Skocz do pozycji: 1.

Tytuł:

Heavy Subgraph Conditions for Longest Cycles to Be Heavy in Graphs

Autorzy:

Lia, Binlong
Zhang, Shenggui

Powiązania:

https://bibliotekanauki.pl/articles/31340942.pdf

Data publikacji:

2016-05-01

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

heavy cycles
heavy subgraphs

Opis:

Let G be a graph on n vertices. A vertex of G with degree at least n/2 is called a heavy vertex, and a cycle of G which contains all the heavy vertices of G is called a heavy cycle. In this note, we characterize graphs which contain no heavy cycles. For a given graph H, we say that G is H-heavy if every induced subgraph of G isomorphic to H contains two nonadjacent vertices with degree sum at least n. We find all the connected graphs S such that a 2-connected graph G being S-heavy implies any longest cycle of G is a heavy cycle.

Źródło:

Discussiones Mathematicae Graph Theory; 2016, 36, 2; 383-392
2083-5892

Pojawia się w:

Discussiones Mathematicae Graph Theory

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Distribution of Heavy Metal Fractions in Sewage Sludge from a Selected Municipal Sewage Treatment Plant

Autorzy:

Wojciula, Ada
Boruszko, Dariusz
Kacprzak, Amadeusz

Powiązania:

https://bibliotekanauki.pl/articles/2069929.pdf

Data publikacji:

2021

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

sewage sludge
heavy metals
heavy metal fraction

Opis:

Sewage sludge used for reclamation of egraded areas or in agriculture must have a certain total heavy metal content, as required by law. In practice, however, it is important to carry out a fractional analysis of the elements contained in the sludge. This activity allows to determine the chemical form of a given metal, thanks to which it is possible to assess the assimilability of elements by plants. The study proved that the fraction of certain metals in sewage sludge can vary depending on the period studied. The combination of elements with other compounds in sludge from one treatment plant can vary from month to month. Once analysis has been carried out, it should not be the basis for assessing the bioavailability of metals if sludge from a given treatment plant were to be sampled several times a year.

Źródło:

Rocznik Ochrona Środowiska; 2021, 23; 369--383
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Analysis of Heavy Metal Fraction Content in Sewage Sludge from Selected Wastewater Treatment Plants

Autorzy:

Wojciula, Ada
Boruszko, Dariusz
Pajewska, Gabriela

Powiązania:

https://bibliotekanauki.pl/articles/1839655.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

sewage sludge
heavy metals
heavy metal fraction

Opis:

Assessment of the assimilability of elements contained in sewage sludge can only be carried out if their fractions, by means of which the chemical form of the element can be identified, are determined. The total content of heavy metals only makes it possible to determine whether the sludge meets the legal requirements and can be used, inter alia, for reclamation, in agriculture or for the adaptation of land to specific needs that result from waste management plans. Therefore, when planning the agricultural use of sewage sludge, attention should be paid above all to the heavy metal fractions contained in it. This is due to the fact that plants do not assimilate every form of element to the same extent. The research and analysis carried out indicate that the metals were most closely related to fractions IV and III, for example they formed connections with silicates, as well as sulphides and organic matter. The metal forms available to plants occupied a small percentage of the total heavy metal content. It was noted that with the metastable fraction of lead increased along with population equivalent. Furthermore, the population equivalent value did not affect the distribution of individual heavy metal fractions in the sludge.

Źródło:

Journal of Ecological Engineering; 2021, 22, 4; 98-105
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

On Implicit Heavy Subgraphs and Hamiltonicity of 2-Connected Graphs

Autorzy:

Zheng, Wei
Wideł, Wojciech
Wang, Ligong

Powiązania:

https://bibliotekanauki.pl/articles/32083821.pdf

Data publikacji:

2021-02-01

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

implicit degree
implicit o-heavy
implicit f-heavy
implicit c-heavy
Hamilton cycle

Opis:

A graph G of order n is implicit claw-heavy if in every induced copy of K1,3 in G there are two non-adjacent vertices with sum of their implicit degrees at least n. We study various implicit degree conditions (including, but not limiting to, Ore- and Fan-type conditions) imposing of which on specific induced subgraphs of a 2-connected implicit claw-heavy graph ensures its Hamiltonicity. In particular, we improve a recent result of [X. Huang, Implicit degree condition for Hamiltonicity of 2-heavy graphs, Discrete Appl. Math. 219 (2017) 126–131] and complete the characterizations of pairs of o-heavy and f-heavy subgraphs for Hamiltonicity of 2-connected graphs.

Źródło:

Discussiones Mathematicae Graph Theory; 2021, 41, 1; 167-181
2083-5892

Pojawia się w:

Discussiones Mathematicae Graph Theory

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Content of Heavy Metals and Their Fractions in Organic Soils of Podlasie

Autorzy:

Wiater, Józefa

Powiązania:

https://bibliotekanauki.pl/articles/124491.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

heavy metal
organic soils
speciation of heavy metals

Opis:

The purpose of this study was to determine the total content of cadmium, lead, nickel, copper, zinc and their fractions in organic soils of Podlasie used as permanent grassland. The research material were samples taken from 30 soils of the Podlasie province in 2011-2013. The samples were taken from the determined layer to depth of 0-30 cm. Basic physicochemical properties were determined in the taken soil samples: organic carbon content, pH in 1 M KCl potentiometrically. The total content of metals after mineralization in aqua regia was determined, and cadmium fractions were determined with a modified BCR method. The measurements were conducted by means of atomic absorption spectroscopy with electrothermal atomization using Varian AA-100 spectrometer. It was found that only 2 soils can be included in the soils with first pollution degree due to the cadmium content. The content of other metals was at geochemical background level. The distribution of investigated metals in the fractions in studied organic soils was different comparing to mineral soils. Most of the analyzed elements were present in the fraction associated with organic substance, which limited their mobility, as evidenced by their low share in the available and potentially available fraction. The proportion of metals in the residual fraction was low, which is typical for organic soils. The share of studied metals in particular fractions varied depending on the sampling date, which may be related to the climatic conditions course in the study period and the treatments performed on these soils.

Źródło:

Journal of Ecological Engineering; 2019, 20, 3; 179-184
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Heavy-mineral analysis in Polish investigations of Quaternary deposits: a review

Autorzy:

Marcinkowski, Bogusław
Mycielska-Dowgiałło, Elżbieta

Powiązania:

https://bibliotekanauki.pl/articles/94664.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

heavy mineral analysis
heavy mineral resistance
heavy mineral habit
heavy mineral density
Polska
analiza ciężkich minerałów
odporność ciężkich minerałów
gęstość mineralna
Polska

Opis:

The composition of heavy-mineral assemblages is one of the main textural features of sediments because they can have significant value for the interpretation of, among others, their depositional environment, their depositional processes, and their stratigraphic position. Distinctive features of heavy minerals include their resistance to chemical weathering and mechanical abrasion, their habit, and their density. These parameters are the most widely used in the heavy-mineral research of Quaternary deposits in Poland, as well as in such research in other countries conducted by Polish scientists. Several other heavy-mineral parameters can also be used in various types of interpretation. It is discussed whether heavy-mineral analysis is decisive in the evaluation of deposits or whether it plays mainly a role that may support evidence obtained by other types of analysis. The attention is mainly devoted to transparent heavy minerals; the significance of opaque heavy minerals for interpretational purposes is only mentioned.

Źródło:

Geologos; 2013, 19, No. 1-2; 5-23
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Heavy Metals in Soils

Autorzy:

Draszawka-Bołzan, Beata

Powiązania:

https://bibliotekanauki.pl/articles/1153848.pdf

Data publikacji:

2015

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

heavy metals
soils

Opis:

For the purposes of this Issue Paper, metals most commonly found at Superfund sites will be discussed in terms of the processes affecting their behavior in soils, as well as in those of the laboratory methods available to evaluate this behavior. The retention capacity of soil will also be discussed with regard to the movement of metals between the other environmental compartments: ground water, surface water, or the atmosphere. Long-term changes in soil environmental conditions, due to the effects of remediation systems or to natural weathering processes, are also explained with respect to the enhanced mobility of metals in soils.

Źródło:

World News of Natural Sciences; 2015, 2; 20-37
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Leaching of heavy metals from monolithic waste

Autorzy:

Mizerna, K.
Król, A.

Powiązania:

https://bibliotekanauki.pl/articles/208246.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

heavy metals
leaching heavy metals
metale ciężkie
wymywanie metali ciężkich

Opis:

Leaching of heavy metals (Zn, Pb, Cu, Ni and Cr) from hazardous waste originating from steel works (slag) has been investigated. Contaminant leaching behavior from monolithic waste materials in the function of time was examined. There was established the cumulative leaching of elements per surface area of waste material and the impact of the duration of the leachant contact with the waste on the leachability. The types of processes accompanying the release of heavy metals were determined as well. Surface wash-off and dissolution were dominant processes during the leaching of the analyzed elements. Chromium was the only element whose release from the sample was controlled by diffusion when subjected to leaching in a liquid of pH 7. Due to the low levels of heavy metal leaching in relation to their concentrations in the samples, it seems that longer duration of the tank test can contribute to the release of additional amounts of the heavy metals.

Źródło:

Environment Protection Engineering; 2018, 44, 4; 143-158
0324-8828

Pojawia się w:

Environment Protection Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Beneficiation of oxide ores using dense medium cyclones. A simulation study

Autorzy:

Aghlmandi Harzanagh, A.
Ergun, S. L.
Gulcan, E.

Powiązania:

https://bibliotekanauki.pl/articles/110337.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

heavy medium cyclone
heavy liquid
simulation
iron ores
manganese
chromite

Opis:

Recent investigations of particle behavior and segregation phenomena in a cyclone underline that little is known about particle distribution within a heavy medium separation. For this purpose, density profiles in a heavy medium cyclone (HMC) is measured with techniques such as computational fluid dynamics (CFD) in combination with discrete element modelling (DEM), electrical resistance tomography (ERT), X-ray tomography, particle dynamics analyzer (PDA) etc. Along with these modern efforts of determining the performance of HMC, traditional methods depending on empirical inferences based on experimental data are still important and in progress. The aim of this research was to investigate the possibility of using HMC for the concentration of problematic ores which are not coarsely aggregated. Towards this purpose, current empirical methods were applied to experimental data which were derived from float-sink tests of selected heavy minerals and Fe, Mn, and Cr ore samples. Low density difference between particles made the enrichment difficult using other gravity methods like jigs and shaking tables. After determining physical and mineralogical properties of the samples, appropriate size fractions were prepared for float-sink tests. Combination of sodium polytungstate and tungsten carbide powder were used to prepare non-toxic heavy liquids with density up to 3.5 g/cm3. Using the sink-float test results and existing empirical models for high-density DMC plants simulations were performed. The results of the simulations followed by experimental studies showed that HMCs are applicable to process Fe, Mn, and Cr ores with acceptable grade and recovery.

Źródło:

Physicochemical Problems of Mineral Processing; 2017, 53, 1; 379-393
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Sewage sludge as barrier material for heavy metals in waste landfill

Autorzy:

Zhang, H.
Yang, B.
Zhang, G.
Zhang, X.

Powiązania:

https://bibliotekanauki.pl/articles/204656.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sewage sludge
hydraulic conductivity
heavy metal pollution
heavy metal retardation

Opis:

Heavy metal pollutants in the leachate of waste landfill are a potential threat to the environment. In this study, the feasibility of using municipal sewage sludge as barrier material for the containment of heavy metal pollutants from solid waste landfills was evaluated by compaction test and hydraulic conductivity test concerning compaction property, impermeability and heavy metal retardation. Results of the compaction test showed that the maximum dry density of 0.79 g·cm⁻³ was achieved at the optimum water content of about 60%. The hydraulic conductivities of compacted sewage sludge permeated with synthetic heavy metal solutions were in the range of 1.3×10⁻⁸ – 6.2×10⁻⁹ cm·s⁻¹, less than 1.0 ×10−⁻⁷cm·s⁻¹ recommended by regulations for barrier materials. Chemical analyses on the effluent from the hydraulic conductivity tests indicated that the two target heavy metals, Zn and Cd in the permeants were all retarded by compacted sewage sludge, which might be attributed to the precipitation and adsorption of heavy metal ions. The results of this study suggest that specially prepared material from sewage sludge could be used as a barrier for waste landfills for its low permeability and strong retardation to heavy metal pollutants.

Źródło:

Archives of Environmental Protection; 2016, 42, 2; 52-58
2083-4772
2083-4810

Pojawia się w:

Archives of Environmental Protection

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Effect of bottom sediment on content, bioaccumulation and translocation on heavy metals in maize biomass
Wplyw osadu dennego na zawartosc, bioakumulacje i translokacje metali ciezkich w biomasie kukurydzy

Autorzy:

Jasiewicz, C
Baran, A.
Tarnawski, M.

Powiązania:

https://bibliotekanauki.pl/articles/16168.pdf

Data publikacji:

2010

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

bottom sediment
heavy metal content
bioaccumulation
translocation
heavy metal
maize
biomass

Opis:

The research aimed to assess the effect of bottom sediment on the content, bioaccumulation and translocation of heavy metals in maize biomass. The investigations were conducted in 2006-2007 as a pot experiment on light soil of the granulometric composition of weakly-loamy sand. The experimental design comprised 3 treatments: without sediment (I), a 5% sediment admixture (II) and a 10% sediment admixture to the soil (III). Bottom sediment was added to the soil in the first year of the investigations. The content of Zn, Cu, Ni. Pb, Cd and Cr was determined using the ICP-EAS method in the plant material after its dry mineralization and ash solution in HNO3. The uptake of the above-mentioned metals by maize was computed alongside their bioaccumulation and translocation coefficients. The effect of bottom sediment admixture on heavy metal concentrations in maize was determined to be varied, e.g. a 5% dose of sediment added to soil decreased the content of all the analyzed heavy metals in the biomass of maize aerial parts, whereas a 10% admixture increased the content of Cu, Ni, Pb and Cr. The values of bioaccumulation coefficients revealed that an admixture of both doses of bottom sediment led to a decreased accumulation of Zn, Cu, Cd, Cr and Ni (5% dose) in maize aerial biomass. Moreover, the plant more easily accumulated Zn, Cd and Cu than Cr, Ni or Pb. Permissible amounts of heavy metals in plants to be used as animal fodder were not exceeded in the maize biomass.
Celem badań była ocena wpływu osadu dennego na zawartość, bioakumulację i translokację metali ciężkich w biomasie kukurydzy. Badania prowadzono w latach 2006-2007, w warunkach doświadczenia wazonowego, na glebie lekkiej o składzie granulometrycznym piasku słabogliniastego. Schemat doświadczenia obejmował 3 obiekty: bez osadu (I), z dodatkiem 5% osadu (II) i dodatkiem 10% osadu do gleby (III). Osad denny dodano do gleby w pierwszym roku badań. Zawartość Zn, Cu, Ni, Pb, Cd, Cr w materiale roślinnym oznaczono po suchej mineralizacji i roztworzeniu popiołu w HNO3. Obliczono wynos ww. metali przez kukurydzę oraz ich współczynniki bioakumulacji i translokacji. Stwierdzono niejednoznaczny wpływ dodatku osadu dennego na zawartość metali ciężkich w kukurydzy. Osad dodany w ilości 5% do gleby wpłynął na zmniejszenie zawartości wszystkich analizowanych metali w nadziemnej biomasie kukurydzy, natomiast 10% dodatek osadu na zwiększenie ich zawartości (Cu, Ni, Pb, Cr). Wartości współczynników bioakumulacji świadczą, że dodatek osadu dennego w obu dawkach spowodował zmniejszenie akumulacji Zn, Cu, Cd, Cr oraz Ni (dawka 5%) w biomasie nadziemnej kukurydzy, ponadto rośliny łatwiej akumulowały Zn, Cd i Cu niż Cr, Ni i Pb. W biomasie kukurydzy nie stwierdzono przekroczenia dopuszczalnych zawartości metali ciężkich przyjętych do oceny roślin pod względem ich przydatności paszowej.

Źródło:

Journal of Elementology; 2010, 15, 2; 281-290
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Metale ciężkie - korzyści i zagrożenie dla zdrowia i środowiska
Heavy metals – Benefits and hazards for the health and the environment

Autorzy:

Kondej, D.

Powiązania:

https://bibliotekanauki.pl/articles/180493.pdf

Data publikacji:

2007

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

metale ciężkie
zatrucie metalami ciężkimi
heavy metals
poisoning by heavy metals

Opis:

W artykule przedstawiono zagadnienia dotyczące występowania metali ciężkich w środowisku życia i pracy człowieka. Scharakteryzowano wybrane metale ciężkie niezbędne dla zdrowia człowieka oraz toksyczne metale ciężkie. Opisano objawy zatrucia wybranymi metalami ciężkimi oraz sposoby zapobiegania im.
This paper presents issues related to heavy metals in residential and occupational environments. It characterizes both heavy metals essential for good health and toxic heavy metals. Symptoms of toxicological effects are presented and prevention of heavy metal poisoning is discussed.

Źródło:

Bezpieczeństwo Pracy : nauka i praktyka; 2007, 2; 25-27
0137-7043

Pojawia się w:

Bezpieczeństwo Pracy : nauka i praktyka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Heavy metals distribution in different soil series of district Swabi, Khyber Pakhunkhawa, Pakistan

Autorzy:

Jamal, Aftab
Sarim, Muhammad

Powiązania:

https://bibliotekanauki.pl/articles/1166358.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Heavy metals
Swabi soils

Opis:

The present research was carried out with the main aim to evaluate the levels of heavy metals in some contaminated or expected to be contaminated by industrial effluents and some non contaminated soils of district Swabi. A total of 30 soil samples were collected from 15 different selected soil series of Swabi area at 0-15 cm and 15-30 cm depths and analyzed for various chemical properties using standard analytical techniques and for extractable heavy metals Zn, Cu, Fe, Cr, Co, Ni, Cd and Pb using Atomic Absorption Spectrophotometer. All soil samples were found non saline having EC values between 0.13-0.56 dsm-1. Soil reaction or pH value ranged from 7.21-8.60 except Mansabdar soil which had pH value of 9.21. It was found that swabi soil was moderately to strongly calcareous in nature, alkaline in reaction having deficient to marginal in organic matter content. Furthermore all soil samples were found almost adequate in Fe, Cu and Zn for most of agriculture crops. The higher concentrations of Ni (22.21 and 21.9 mg kg-1) and Cr (8.02 and 5.11 mg kg-1) at both surface and sub surface were recorded in Gadoom Amazai soils located near ghee mills and many other industries. Higher levels of heavy metals were observed in contaminated soils as compared with non contaminated soils. Decreased in concentration levels of metals were observed in majority of soils with increase in depth. No correlation was found between AB-DTPA extractable heavy metals and soil chemical properties and it might be due to samples collected from different locations with different thermodynamic characteristics.

Źródło:

World Scientific News; 2018, 105; 1-13
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Heavy metals in circulation biogeochemical

Autorzy:

Cyraniak, Emil
Draszawka – Bołzan, Beata

Powiązania:

https://bibliotekanauki.pl/articles/1194079.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

biogeochemical
circulation
heavy metals

Opis:

Heavy metals can come from two types of sources: natural and anthropogenic. Natural origin of heavy metals associated with: volcanic eruptions, weathering of rocks, processes soil - creative, forest fires or evaporation of the oceans. Anthropogenic sources of pollution these elements is primarily the burning of fuels, both in power and heating plants and power plants as well as regional and local municipal boiler houses, as well as in the home. In addition to the natural environment gets heavy metals as a result of non-ferrous metals and iron, waste incineration and transport. The rapid development of technology and the changes that are occurring in the world today largely affect on the environment. One of the primary sources of pollution of the biosphere are industrial plants, which emit both gaseous substances (eg. Carbon monoxide, sulfur and nitrogen) and dust, containing all sorts of toxic substances. For the serious consequences of the development of civilization and industry should be spread include heavy metals [6]. Included in the atmosphere, dust and heavy metals fall to the ground parts of plants and enters the soil. Shall be collected by the roots of plants or animals grazing on the roads and thus incorporated into the food chain. These elements are not biodegradable.

Źródło:

World Scientific News; 2014, 6; 10-16
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

The school performance of boys from rural schools in Lower Silesia in the light of lead concentration in blood
Osiągnięcia szkolne chłopców z Dolnego Śląska w świetle stężenia ołowiu we krwi

Autorzy:

Żurek, Grzegorz

Powiązania:

https://bibliotekanauki.pl/articles/1178966.pdf

Data publikacji:

2012

Wydawca:

Instytut Medycyny Wsi

Tematy:

heavy metals
school performance

Opis:

Research conducted in many research centers all over the world indicate health threats resulting from the presence of lead in the blood gradually decreases to the permissible amount. Lead accumulation in a living organism results in adverse changes in different body systems, symptoms of which include various behavioral changes. They can be reflected in grades obtained by the child at school. The aim of this paper was to establish whether the blood lead level diversify the boys in the respect of their school performance during consecutive years of primary education. The amount of lead in blood of 94 boys at the age of 10 has been measured; subsequently, the group of subjects was divided into two subgroups; the first one (termed in this paper „L”) comprised students whose Pb-B level was lower than 6 μg/dl (4,846 μg/dl on average) and the second one (termed „H”) comprised boys whose blood level exceeded 6 μg/dl (9,256 μg/dl on average). Academic performance in the arts, scientific subjects, geography and natural science in respective groups was assessed. Said procedure was replicated in respective subgroups after a year when the subjects were 11 years old. It was ascertained that the academic performance of the boys with higher blood lead levels deteriorated in scientific subjects and tended to worsen also in other school subject groups. Performance of the students whose blood lead level was lower in the initial examination remained unchanged or improved.
Badania podejmowane w wielu ośrodkach naukowych na całym świecie, wskazujące na zagrożenia zdrowotne wynikające z obecności ołowiu we krwi, zaowocowały stopniowym obniżeniem dopuszczalnej zawartości tego metalu ciężkiego w organizmie. Konsekwencją jego kumulacji są bowiem niekorzystne zmiany obserwowane w układach wewnętrznych, których jednym z przejawów są m.in. różnego rodzaju zmiany behawioralne. Mogą one przekładać się na oceny uzyskiwane przez dziecko w szkole. Celem niniejszej pracy było określenie czy poziom ołowiu we krwi różnicuje chłopców pod kątem ich osiągnięć szkolnych w kolejnych latach kształcenia w szkole podstawowej. Wykonano pomiar zawartości ołowiu we krwi 94 chłopców 10-letnich, a następnie całą grupę badanych podzielono na dwie podgrupy; pierwszą (zwana umownie „N”), w której znaleźli się uczniowie, których poziom Pb-B był mniejszy niż 6 μg/dl (średnio 4,84 μg/dl) i drugą (W) o zawartości ołowiu we krwi przekraczającej ten poziom (średnio 9,25 g/dl). Wgrupach tych oceniono osiągnięcia w nauce z przedmiotów humanistycznych, ścisłych oraz geograficzno-przyrodniczych. Procedurę tę w wyodrębnionych podgrupach powtórzono w kolejnym roku, a więc wśród 11-latków, Wśród chłopców o wyższej zawartości ołowiu we krwi stwierdzono istotne obniżenie się wyników w nauce przedmiotów ścisłych oraz tendencję do obniżania się ocen z pozostałych grup przedmiotów. Uczniowie, których poziom ołowiu we krwi był niższy w badaniu wyjściowym utrzymali lub podnieśli poziom swoich osiągnięć szkolnych.

Źródło:

Medycyna Środowiskowa - Environmental Medicine; 2012, 15, 1; 27-31
1505-7054
2084-6312

Pojawia się w:

Medycyna Środowiskowa - Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Effectiveness of removing heavy metals by bacteria from water solutions

Autorzy:

Loc, N.T.B

Powiązania:

https://bibliotekanauki.pl/articles/395815.pdf

Data publikacji:

2010

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

bakteria
metale ciężkie
usuwanie metali ciężkich
bacteria
heavy metals
removing heavy metals

Opis:

The research on the effectiveness of removing heavy metals from water solutions by bacteria was carried out at the laboratory of the Institute of Environmental Engineering of the University of Zielona Góra in 2007-2008. The research covered bacterial strains isolated from sludge, soil and water. The tests concerned the effect of 3 heavy metals: Pb (0,1%), Cu (0,1%) and Zn (0,1%). The results prove that due to the presence of heavy metals, the size of colonies was much lowered in comparison with the control pan. Some of the strains, reader doesnt know numbers in the 0,1% concentration of Cu and Zn in the culture scale. It turns out that this concentration was completely hazardous with respect to the growth of those bacterial strains. Considering all the heavy metals under analysis, it was found that Cu had the most hazardous effect on the growth of 4 bacterial strains, then Zn and Pb. Under the influence of 4 bacterial strains, the content of the metals that after 7-day long incubation remained is different depending on metal and bacterial strain. Removing Heavy Metals by bacteria from Water solutions heavy metals by bacteria from water solutions: Pb (34,38%), then Cu (29,69%) and Zn (21,88%). The content of the heavy metals removing by 4 strains was from 65,62% to 78,12%. The biggest amount removing was for Zn (78,12%) and the smallest for Zn (65,62%).

Źródło:

Civil and Environmental Engineering Reports; 2010, 5; 263-272
2080-5187
2450-8594

Pojawia się w:

Civil and Environmental Engineering Reports

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Anthropogenic sediments from facultative lagoons of the Konstancin - Jeziorna sewage treatment facility and their usability for soil recultivation

Autorzy:

Kostrz-Sikora, P.
Bojakowska, I.
Wołkiewicz, S.
Dobek, P.
Lech, D.
Narkiewicz, W.

Powiązania:

https://bibliotekanauki.pl/articles/184200.pdf

Data publikacji:

2015

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

anthropogenic soils
heavy metals
revitalization

Opis:

The sewage treatment facility of a paper mill at Konstancin-Jeziorna was opened to process industrial and domestic wastewater. After closure of that mill, the sewage treatment facility had to be rebuilt and modernized. Therefore, it was necessary to analyse the chemical and phase composition of the sediments from facultative lagoons used for biological treatment of wastewater. Eight samples of sediments were taken to identify a general phase composition by X-ray diffraction and ten to determine concentrations of selected main and trace elements with the use of ICP-AES and AMA methods.The analyses showed that the sediments consisted of over 90% of mineral fraction, mainly kaolinite, calcite, and quartz and also neomorphic smithsonite. They contained low quantities of Hg, Cd, Co and Mo, and elevated concentrations of Zn, Ba, Mn and Sr. Comparisons of the obtained mean values with admissible concentrations of metals, as defined by Regulation of the Minister of Environment of 9 September 2002, showed that the mean concentrations of As, Sn, Co, Mo and Ni (and also of Hg and Cr in the southern lagoon) met quality standards for soils in areas under protection (group A). Mean concentrations of Pb (both lagoons), Ba, Cu, Cd (northern lagoon) as well as Cr and Hg (southern lagoon) in sediments are higher. However, they still meet standards for areas usable for agricultural and other purposes (group B). The highest concentrations were recorded for Zn, Cd, Cu and Ba in samples from the southern lagoon. These continued to be lower than all the limits acceptable for industrial areas.

Źródło:

Geology, Geophysics and Environment; 2015, 41, 2; 177-185
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Chromium in urothelial carcinoma of the bladder

Autorzy:

Gołąbek, Tomasz
Socha, Katarzyna
Kudelski, Jacek
Darewicz, Barbara
Markiewicz-Zukowska, Renata
Chłosta, Piotr
Borawska, Maria

Powiązania:

https://bibliotekanauki.pl/articles/987066.pdf

Data publikacji:

2017

Wydawca:

Instytut Medycyny Wsi

Tematy:

chromium
bladder cancer
heavy metals

Opis:

Introduction and objectives. Many epidemiological and experimental studies report a strong role of chemical carcinogens in the etiology of bladder cancer. However, the involvement of heavy metals in tumourigenesis of urothelial carcinoma of the bladder has been poorly investigated. Therefore, the aim of this study was to examine the relationship between chromium (Cr) and bladder cancer. Materials and methods. Chromium concentration in two 36-sample series of bladder cancer tissue and sera from patients with this neoplasm were matched with those of a control group. The amount of trace elements in every tissue sample was determined using atomic absorption spectrometry. This was correlated with tumour stage. Results. While the median chromium concentration levels reached statistically higher values in the bladder cancer tissue, compared with the non-cancer tissue (99.632ng/g and 33.144ng/g, respectively; p<0.001), the median Cr levels in the sera of the patients with this carcinoma showed no statistical difference when compared to those of the control group (0.511μg/l and 0.710μg/l, respectively; p=0.408). The median levels of Cr in the bladder tissue, depending on the stage of the tumour, compared with the tissue without the neoplasm, observed the same relationship for both non-muscle invasive and muscleinvasive tumours (p<0.001 and p<0.01, respectively). Conclusions. This study shows that patients with urothelial carcinoma of the bladder had higher tissue Cr levels than people without tumour, while no difference was found in the Cr serum levels between the two groups of patients under investigation.

Źródło:

Annals of Agricultural and Environmental Medicine; 2017, 24, 4
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Heavy metals in tundra plants of the Bellsund in West Spitsbergen, investigated in the years 1987-1995

Autorzy:

Jóźwik, Zbigniew

Powiązania:

https://bibliotekanauki.pl/articles/2052450.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Arctica
Spitsbergen
plants
heavy metals

Źródło:

Polish Polar Research; 2000, 21, 1; 43-54
0138-0338
2081-8262

Pojawia się w:

Polish Polar Research

Dostawca treści:

Biblioteka Nauki

/5

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Tytuł:

Effect of overlying water pH, dissolved oxygen and temperature on heavy metal release from river sediments under laboratory conditions

Autorzy:

Huang, Y.
Zhang, D.
Xu, Z.
Yuan, S.
Li, Y.
Wang, L.

Powiązania:

https://bibliotekanauki.pl/articles/204852.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

heavy metal
release
river sediment

Opis:

The heavy metal release experiments were conducted in the laboratory to examine the effects of 3 factors - pH, dissolved oxygen (DO), and temperature on the metal release from sediments taken from the Huangpu River. The metal concentrations in the dry sediments ranged from 0.030 to 0.296 mg g^-1 for Cr, 0.021 to 0.097 mg g^-1 for Ni, 0.014 to 0.219 mg g^-1 for Cu, 0.035 mg to 0.521 mg g^-1 for Zn, 0.0002 to 0.001 mg g^-1 for Cd and 0.023 to 0.089 mg g^-1 for Pb. Most of the metals found in the sediments were in the form of residual fraction, the exchangeable fraction consisted of only a small portion of total metals. The average dissolved metal concentrations in the overlying water during the 13-day period under different conditions were ranging from 0.82 to 1.93 μg L^-1 for Cr, 1.08 to 4.19 μg L^-1 for Ni, 40.79 to 82.28 μg L^-1 for Cu, 20.30 to 29.96 μg L-1 for Zn, 1.57 to 4.07 μg L^-1 for Cd, and 22.26 to 75.50 μg L^-1 for Pb, respectively. Statistical interpretation of the data indicated that pH (7, 8, 9), dissolved oxygen DO (1.0 and 5.0 mg L^-1) and temperature (4, 16, 25°C) had no significant effects on the heavy metal release under the studied conditions. Cu and Pb had the highest release flux, while Cd, Pb and Cu had higher mobility. The main factors controlling the metals release might be the inherent characters of metals and sediments.

Źródło:

Archives of Environmental Protection; 2017, 43, 2; 28-36
2083-4772
2083-4810

Pojawia się w:

Archives of Environmental Protection

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Scale of pollutions with heavy metals in water and sediment of River Ibër from landfill in Kelmend, Kosovo

Autorzy:

Kadriu, Sadija
Sadiku, Milaim
Kelmendi, Mensur
Mulliqi, Ismet
Aliu, Mehush
Hyseni, Arbër

Powiązania:

https://bibliotekanauki.pl/articles/89156.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

river
waters
sediments
heavy metals

Opis:

Pollution with heavy metals and waters in Mitrovica with surroundings, both in the past and in present days, is a preoccupation for the citizens of Mirtovica, as well as for the other inhabitants living around it. Such a problem has been a concern which still continues for a number of researchers who have been dealing with this issue, and who still continue to be preoccupied with the issue of heavy metal (habitat) pollution in this part of Kosovo. Heavy metal's contamination of the environment's main components, dates back to the 1970s/90s to this date. This pollution, especially of the rivers, is due to the industrial activity taking place in the Trepça Combine and the presence of industrial landfill sites of this Combine near the flow of two main rivers: the Sitnica and Ibër River waters, in the city of Mitrovica. The focus of our study, this time consists solely in the research and illumination of pollution with these heavy metals and waterworks of the Ibër River, as a result of the pollution caused by the industrial waste landfill located in Kelmend village. In the paper, we have attempted to show the concentration of heavy metals in sediment and water, by pointing at four sample sites of the Ibër river: in the Bosniak U₁ neighborhood, then in the flow in front the U₂ landfill, discharge flows from landfill U₃ and a certain distance from the U₄ landfill.

Źródło:

Mining Science; 2019, 26; 147-155
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Soil Pollution in the Azov Territories of Rostov-on-Don and Taganrog

Autorzy:

Zabaikin, Yuri V.
Lyutyagin, Dmitry V.
Yashin, Vladimir P.
Yashina, Valentina I.

Powiązania:

https://bibliotekanauki.pl/articles/1955493.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

soil
pollution
heavy metals
Azov

Opis:

The research on the topic of the dissertation was carried out within the coastal (southern) part of the Azov oblique dissected accumulative-denudated plain and the coastal strip of the coast of the Sea of Azov, as well as the valleys of the lower reaches of the Don and Kalmius rivers. The research area covered the modern territory of Taganrog and Rostov-on-Don cities and a suburban area up to 15-20 km away from the borders of these cities. According to the materials of the USSR soil map, as well as modern schemes of soil zoning in Russia, the study area covers the distribution area of ordinary chernozems and partially southern low-humus chernozems on loess rocks. The main zonal soil studied was ordinary chernozem. Ordinary warm chernozems with a short freezing period, belonging to the Azov-Ciscaucasian province of powerful and super-powerful chernozems, predominate in the soil cover of the Azov inclined plain, extending from the Donets Ridge to the shores of the Sea of Azov and the lower Don River.

Źródło:

Journal of Ecological Engineering; 2021, 22, 8; 165-171
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Binding of Industrial Deposits of Heavy Metals and Arsenic in the Soil by 3-Aminopropyltrimethoxysilane

Autorzy:

Grzesiak, P.
Łukaszyk, J.
Schroeder, G.
Kurczewska, J.

Powiązania:

https://bibliotekanauki.pl/articles/778689.pdf

Data publikacji:

2014

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

nanotechnology
heavy metals
soil stabilization

Opis:

The results of the research studies concerning binding of heavy metals and arsenic (HM+As), occurring in soils affected by emissions from Głogów Copper Smelter and Refinery, by silane nanomaterial have been described. The content of heavy metals and arsenic was determined by AAS and the effectiveness of heavy metals and arsenic binding by 3-Aminopropyltrimethoxysilane was examined. The total leaching level of impurities in those fractions was 73.26% Cu, 74.7% – Pb, 79.5% Zn, 65.81% – Cd and 55.55% As. The studies demonstrated that the total binding of heavy metals and arsenic with nanomaterial in all fractions was about as follows: 20.5% Cu, 9.5% Pb, 7.1% Zn, 25.3% Cd and 10.89% As. The results presented how the safety of food can be cultivated around industrial area, as the currently used soil stabilization technique of HM by soil pH does not guarantee their stable blocking in a sorptive complex.

Źródło:

Polish Journal of Chemical Technology; 2014, 16, 2; 12-15
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Effect of Vermicomposting on the Concentration of Heavy Metals in Soil with Drill Cuttings

Autorzy:

Kujawska, Justyna
Wójcik-Oliveira, Katarzyna

Powiązania:

https://bibliotekanauki.pl/articles/123685.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

drill cuttings
vermicomposting
heavy metals

Opis:

Organic and non-organic pollution present in the drilling waste may negatively impact flora and fauna. The tests conducted on earthworms may serve as indicators for the assessment of pollution bioavailability, i.a. heavy metals, polycyclic aromatic hydrocarbons, due to the relatively stable ratios between the concentration of certain pollutants in earthworms and soil. Moreover, earthworms are capable of metal bioaccumulation in tissues; therefore, they can be utilized as an ecological indicator of soil pollution. The studies on bioaccumulation of heavy metals from soils with the addition of drilling wastes in tissues of earthworms were conducted. The reduction percentage (R) of each scenario was calculated for the total concentration of all heavy metals. As data showed, all heavy metal content was reduced from its initial concentration.

Źródło:

Journal of Ecological Engineering; 2019, 20, 1; 152-157
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Evaluation of the Content of Selected Heavy Metals in Samples of Polish Honeys

Autorzy:

Sitarz-Palczak, E.
Kalembkiewicz, J.
Galas, D.

Powiązania:

https://bibliotekanauki.pl/articles/123800.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

bee products
heavy metals
FAAS

Opis:

This paper presents the result of the determination of the total content of Cu, Pb and Zn by the method of atomic absorption spectrometry with atomization in an air-acetylene flame in Polish honeys samples. The research material was a honeydew, monofloral honey and buckwheat honey. For the mineralization of samples, the following solutions were applied: 1) HNO_3(conc), 2) HNO_3(conc) and H₂O_2(conc) in the volume ratio equal to 4:1 and 3:1. On the basis of the results and recommended food standards the percentage of the recommended dietary allowances (RDA) in connection with the consumption of 100 g of product were estimated. To verify the results validation of analytical method used was carried out. It was included defining the following validation parameters values: the limit of detection and quantification; linearity and measurement range; repeatability and accuracy of the results. The contamination of the analyzed honeys by Pb is higher than the acceptable level of contamination of this element. The highest contents of Cu and Zn were characterized by monofloral honeys.

Źródło:

Journal of Ecological Engineering; 2015, 16, 3; 130-138
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Bees as Bioindicators of Environmental Pollution with Metals in an Urban Area

Autorzy:

Skorbiłowicz, E.
Skorbiłowicz, M.
Cieśluk, I.

Powiązania:

https://bibliotekanauki.pl/articles/124666.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

bees
bioindicators
pollution
heavy metals

Opis:

The commonness of metal contamination, even at considerable distances from industrial centers and intensively used economic areas, has become the interest of many researchers. The issue of evaluating the state of the environment with the help of living organisms has become a very important part in the control of the natural environment. Honey bee (Apis mellifera L) is a good bioindicator as it is inextricably linked to the natural environment in which it lives. The aim of the research, and at the same time the main assumption of the study, was to evaluate the effectiveness of honeybees (Apis mellifera L) as bioindicators for the presence of Cu, Cr, Zn, Mn, Fe in the urban area (example of Bialystok city). The study includes pilot studies covering three sampling periods (March, June and September 2015). Analyses of metals were made by ASA method. The results showed the presence of Cu, Cr Zn, Mn and Fe in all bees samples. An increased content of Cr in bees was also found, which may be the result of the presence of this element in the environment (air, soil, water, plants, pollen) and in the impregnation agent applied to protect wooden elements of the bee hive. The research showed seasonal variation of metals in bees bodies. The main sources of studied metals in bee samples seem to be motorization, industry, and municipal economy within the urban area. Statistical calculations showed a common origin of majority of studied metals. Bee studies for metals contents can be an important element of a bio-monitoring of changing natural environment as a consequence of anthropogenic activity.

Źródło:

Journal of Ecological Engineering; 2018, 19, 3; 229-234
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Bać się czy się nie bać? Bioakumulacja, bioindykacja i toksyczność metali ciężkich Rośliny w świetle badań terenowych i laboratoryjnych
To be afraid or not to be afraid? Bioaccumulation, bioindication and toxicity of heavy metals Plants in the light of field and laboratory studies

Autorzy:

Nadgórska-Socha, Aleksandra

Powiązania:

https://bibliotekanauki.pl/articles/1367524.pdf

Data publikacji:

2021-06-21

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

heavy metals
biomonitoring
metallophytes
phytoremediation

Opis:

Heavy metals that pose a threat to the environment include lead (Pb), zinc (Zn), copper (Cu), arsenic (As), cadmium (Cd), chromium (Cr), nickel (Ni) and mercury (Hg). Biomonitoring of environmental quality using plants is widely accepted as a reliable and inexpensive way of obtaining information on contamination also by heavy metals. It allows the assessment of the direction of changes in the natural environment and development of prognoses and methods for early warning related to predicted transformations in ecosystems. This paper presents the results of field and laboratory studies on floristic biodiversity in the areas of southern Poland related to extraction and processing of Zn and Pb ores. The paper also shows the selected plant defence mechanisms against the excess of heavy metals and the results of bioindication studies using different plant species, including the selected metallophytes related to the assessment of contamination levels and the most frequently used plant ecophysiological parameters. It is necessary to monitor contamination level, popularize knowledge and take action at the level of local authorities to mitigate adverse effects of human activity, bearing in mind possible bioaccumulation of heavy metals in the food chain and the adverse health effects associated with environmental contamination.

Źródło:

Narracje o Zagładzie; 2021, specjalny; 225-253
2450-4424

Pojawia się w:

Narracje o Zagładzie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Study of the Variations in the Vertical and Horizontal Distribution of Heavy Sand Minerals in the Hilla River Sediments

Autorzy:

Hameed, Iman A.
Rahman, Haleema Abdul Jabbar Abdul
Anmar, Alsaadi

Powiązania:

https://bibliotekanauki.pl/articles/27323812.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

sediment
heavy minerals
specific gravity

Opis:

This study was conducted to investigate the effect of the Hilla River sediments on the heterogeneity of the distribution of heavy sand minerals for the fine and very fine sand classes as well as for the surface and subsurface layers. The results showed that the heavy sand minerals that were determined according to the specific gravity of each mineral and the specific gravity of the particles of minerals identified in the soils under study ranged between (2.5–4.5) and were divided into four groups in terms of the specific gravity. The first group included each of the minerals (Mica and Chlorite) of low specific gravity, while the second group contains (Pyroxene, Amphibole, Epidote Group). The third group includes minerals (Tourmaline and Garnet, Staurolite and Kyanite) and the two groups are classified as minerals of medium-specific gravity; in turn, the fourth group contains minerals of high specific gravity, namely (Zircon, Rutile and Opaques). As a result, the most important factors affecting the sedimentation, sorting and sedimentation processes are the conveyor’s speed, load capacity, the size of the separation particles and their specific gravity. The complete mismatch of the horizontal distribution of the minerals of one group is due to the varying ranges of the specific gravity of the minerals within the general range of specific gravity.

Źródło:

Journal of Ecological Engineering; 2023, 24, 7; 318--330
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 29.

Tytuł:

Analysis of the Possibility of Heavy Metal Ions Removal from Aqueous Solutions on Fruit Pomace

Autorzy:

Krasowska, Małgorzata
Kowczyk-Sadowy, Małgorzata
Szatyłowicz, Ewa
Obidziński, Sławomir

Powiązania:

https://bibliotekanauki.pl/articles/24201639.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

fruit pomace
adsorption
heavy metals

Opis:

Pomace from apples, grapes, blackcurrants, and oranges is a waste product of fruit processing, which is formed during the production of juices. Pomace is a rich source of biologically active compounds such as polyphenols, carotenoids, or vitamins. They also contain pectin, cellulose, lignin, proteins, and minerals. All these components, apart from having many beneficial properties for human health, also show sorption properties towards heavy metal ions. Therefore, this study aimed to evaluate the possibility of removing lead (II) and cadmium (II) ions from aqueous solutions by adding apple, grape, black currant, and orange pomace as well as to determine the adsorption efficiency of selected heavy metals. The studies were carried out in model systems. The results of the research showed that lead (II) and cadmium (II) ions are adsorbed on fruit pomace. The highest removal of cadmium (II) ions was observed in orange pomace and of lead (II) ions in apple pomace. The maximum tested cadmium ions absorption capacity was: 0.117235 mg/g in the case of freeze-dried apple pomace; 0.08618 mg/g in the case of freeze-dried currant pomace; 0.21915 m/g in the case of freeze-dried grape pomace and 0.29549 mg/g in the case of freeze-dried orange pomace. On the other hand, the maximum absorption of lead ions was: 0.457 mg/g in the case of freeze-dried apple pomace; 0.442 mg/g in the case of freeze-dried currant pomace; 0.3445 mg/g in the case of freeze-dried grape pomace and 0.421 mg/g in the case of freeze-dried orange pomace. On the basis of the performed measurements, it can be concluded that the tested waste can potentially be used as a cheap biosorbent for removing heavy metal ions from dilute aqueous solutions.

Źródło:

Journal of Ecological Engineering; 2023, 24, 3; 169--177
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Determination of Heavy Metals in Bee Honey as a Bioindicator in the Istog, Drenas and Kastriot Regions

Autorzy:

Demaku, Skender
Aliu, Arbnorë
Sylejmani, Donika
Ahmetaj, Blerina
Halili, Jeton

Powiązania:

https://bibliotekanauki.pl/articles/24201705.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

pollution
environment
honey
heavy metals

Opis:

The major goal of this research was to employ honey as a bio-indicator to identify the heavy metal levels in bee honey in the Istog, Drenas, and Kastriot regions. As a result, honey was purposely tested in these locations, and two industrial specific areas were chosen for examination and analysis: Kastriot (Graboc) and Drenas (Vrboc), as these are considered to be among the most industrial polluted areas. A honey sample was also taken in the Istog (Vrell, as a clean area) region in order to compare not just honey, but also the area where the bee obtains nectar, as well as the sources of pollution discharge into the environment. Concentrations of heavy metals in honey, (min. and max.) amounted to: Zn (8.705–9.804 mg/kg), Mn (5.620–5.718 mg/kg), Fe (3.635–3.745 mg/kg) and Cu (2.295–2.299 mg/kg). In contrast, lower concentrations of metals, have been observed for: Ni (0.640–1.126 mg/kg), Pb (0.235–0.268 mg/kg), As (0.107–0.199 mg/kg), Cd (0.040–0.058 mg/kg) and Cr (0.025–0.036 mg/kg) while elements such as; Hg, and Co, are almost undetected. The study of hierarchical clusters revealed several groupings of elements with geogenic and anthropogenic origins. The concentrations of heavy metals selected for honey were compared to standards of other countries, such as Poland and other European Union countries. Samples were taken in October 2020 and September 2021. The concentration of heavy metals was determined using inductively coupled plasma optical emission spectrometry, ICP OES.

Źródło:

Journal of Ecological Engineering; 2023, 24, 5; 191--200
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Metal Detoxification in Nature and Its Translation into Functional Adsorbent Materials

Autorzy:

Permana, Rega
Ihsan, Yudi Nurul

Powiązania:

https://bibliotekanauki.pl/articles/1030803.pdf

Data publikacji:

2020

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

adsorbent
bioinspired
heavy metal
polyphenol

Opis:

Nature has a remarkable strategies to overcome the unfavoring environmental condition by producing a unique chemical compounds, including polyphenol. Polyphenol residues in many living organism have been documented to express numerous biological function ranging from antioxidant, mechanical reinforcement as well as metal anchoring substances. This gave us insight of how nature converts toxic metal compound and deposits it into a harmless form. This review will discuss some natural strategies of living organism to metabolize metal in a safe manner so that the metal no longer harmful to them. Example taken from aluminum accumulating plants, vanadium accumulating marine tunicate and iron-reinforced mussel byssus, which all three utilized phenol derivative compound to chelate the metal. Advances made by incorporating cutting edge characterization tools allowed us to understand the exact mechanism of metal chelation at the atomic level. A comprehensive discussion of molecular mechanism governing the complexion between the phenolic compound and metal will be beneficial for further study to fabricate functional materials, for example adsorbent, to remediate contaminated water. Translating these natural strategies into an engineered polyphenol based adsorbent materials will be prospective to be further applied as a remediation agent as it is easily found in nature, cost effective and highly efficient.

Źródło:

World Scientific News; 2020, 145; 144-155
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Seasonal variation of heavy metal contamination of groundwater in and around Udaiyarpalyam taluk, Ariyalur district, Tamil Nadu

Autorzy:

Sekar, K. G.
Suriyakalab, K.

Powiązania:

https://bibliotekanauki.pl/articles/1192980.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Groundwater
Heavy metals
Irrigation
WHO

Opis:

The study was carried out to determine the concentration of heavy metal ions in and around this area. Thirty two ground water samples were collected from in and around Udaiyarpalyam taluk during pre-monsoon and post monsoon season during the year of 2014. The concentration of trace metals such as iron, lead, cadmium, and chromium were determined using atomic absorption spectrophotometer and the results were compared with the World Health Organization (WHO) and Bureau Indian standard (BIS) values. It reveals revealed the presence of some heavy metals in few ground water samples and hence refers heavy metal contamination of water sources. The result shows that most of the groundwater is deteriorated less than the permissible limit of WHO.

Źródło:

World Scientific News; 2016, 36; 47-60
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Physicochemical properties and selected metals in soils of Ohaji-Egbema, Imo State, Nigeria

Autorzy:

Chukwuemeka, Apakama N.
Ngozi, Verla E.
Chukwuemeka, Ihenetu S.
Wirnkor, Verla A.

Powiązania:

https://bibliotekanauki.pl/articles/1114214.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Characterization
Heavy metals
Oil pollution

Opis:

This study assesses the physiochemical characteristics and heavy metals content of crude oil polluted soils and non-polluted soils from Ohaji/Egbema, Imo State. Soil samples were collected at depths of 0-30 cm at each sampling point and then analyzed using standard analytical methods. Data from the five areas were compared to standards for soils in Nigeria and in World Health Organization (WHO) data banks. The results obtained from the analysis showed an average pH of (4.88 ± 0.02 to 5.02 ± 0.04) for polluted soil and (6.57 ± 0.05 to 6.82 ± 0.03) for non-polluted soil, electrical conductivity (571 ± 1.1 to 592 ± 0.8 µS/cm) for oil polluted soil and (383 ± 0.5 to 415 ± 1.6 µS/cm) for non-polluted samples, moisture content (5.2 ± 0.2 to 9.1 ±0.1 %) for polluted soil and (4.5 ± 0.1 to 4.7 ± 0.3 %) for non-polluted soil samples. There was no significant difference in temperature and organic matter for both the polluted and non-polluted soil samples. The heavy metals analysis results showed Fe3+ (0.615 to 0.989 ppm) for oil-polluted soil samples and (0.0453 to 0.273 ppm) for non-polluted soil samples, Pb2+ (0.017 to 0.180 ppm) for oil-polluted soil and (0.008 to 0.010 ppm) for non-polluted soil. The study reveals that areas that are polluted need urgent remediation if the soil is to be used for agricultural purposes.

Źródło:

World News of Natural Sciences; 2017, 10; 39-48
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Heavy metals in tundra plants of Bellsund area, Spitsbergen

Autorzy:

Jóźwik, Zbigniew

Powiązania:

https://bibliotekanauki.pl/articles/2052866.pdf

Data publikacji:

1990

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Arctic
Spitsbergen
plants
heavy metals

Źródło:

Polish Polar Research; 1990, 11, 3-4; 401-409
0138-0338
2081-8262

Pojawia się w:

Polish Polar Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Odbiór bodźców środowiskowych przez glony Characeae sygnalizowany za pomocą ultrasłabej luminescencji
Reception of environmental stimuli by Characeae algae manifested by ultraweak luminescence

Autorzy:

Jaśkowska, A.
Dudziak, A.
Borc, R

Powiązania:

https://bibliotekanauki.pl/articles/1819387.pdf

Data publikacji:

2012

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

photon emission
heavy metals
inhibition

Opis:

Protecting the environment requires ensuring such conditions that organisms living in it did not suffer permanent damage to their structures and life functions. This also applies to algae living in the aquatic environment. Some species of water flora especially quickly react to negative stimuli arriving from the environment. Their reactions to experienced stress may be a subtle criterion for assessing the condition of aquatic environment. To this kind of plants belong Chara, which are bioindicators of water quality. Their response to applied environmental stimuli is rapid changes of the electrical parameters of the cell membrane. Our research shows that there is also a change in the intensity of ultraweak luminescence (UWL) generated by these plants. UWL is a phenomenon that continuously accompanies processes occurring in living cells and its intensity is less than the threshold sensitivity of the human eye. The method of measurement of this little known way of Chara's response to environmental stimuli has the advantage that it is completely non-invasive for the test material. Non-invasiveness is due to the fact that the radiation emitted from the samples is measured outside the cell membrane separating the living matter from the surrounding environment. In our study, after exposure to a selected stimulus, three types of responses of plant cells were observed: 1) - after a temporary increase of UWL, there is a return to the level of light corresponding to undisturbed homeostasis (e.g. when ascorbic acid is added to the environment); 2) - after a temporary increase in the UWL, the emission of photons slightly falls and stabilizes at a new higher level of illumination (when the stress stimulus is e.g. lead acetate, the emission intensity is 2.2 times larger than in the beginning); 3) - after a sudden and significant increase of UWL, the high emission level is maintained for many hours (e.g. after adding sucrose follows a 20-fold increase of UWL). UWL curves obtained in our experiments correlate with the changes of entropy corresponding to the disturbance of homeostasis in individual cases, depending on the applied stimulus. Respectively: for 1) - an increase of entropy is temporary and is followed by a return to values before the application of the stimulus, 2) - a lasting change occurs, which consists in an increase of entropy to a new fixed level, 3) - change in entropy is so large that its value exceeds the so-called point of no return, which means that the disorder of homeostasis leads to cell death. The application of luminescence imaging technique Single Photon Counting Imaging (SPCI) to the test cells have revealed that the emission of photons from different parts of the plant has a different intensity. When the plant suffered mechanical damage by cutting pseudoleaves, the emission from the damaged sites increased dramatically. This observation allows the damage to be located. Thanks to SPCI technique, it is also possible to track over time any repair processes. The clear differentiation of UWL kinetics leads to the conclusion that monitoring its intensity can be a good research tool in environmental protection. It makes it possible to determine whether chemicals found in the aquatic environment are harmful to a given species of plants. It can be also assessed whether the degree of the harm threatens the entire population with extinction. Thus, the presented method can be used as an ecotoxicity test.

Źródło:

Rocznik Ochrona Środowiska; 2012, Tom 14; 380-392
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Influence of Decreasing Supplementation to Transformation of Chemical Forms of Ni, Zn and Cu During CompoInfluence of Decreasing Supplementation to Transformation of Chemical Forms of Ni, Zn and Cu During Composting of Sewage Sludge

Autorzy:

Sidełko, Robert
Janowska, Beata
Leśniańska, Aleksandra
Kraszewska, Katarzyna
Grabowska, Karina

Powiązania:

https://bibliotekanauki.pl/articles/2069914.pdf

Data publikacji:

2021

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

sewage
composting
heavy metals
speciation

Opis:

This paper pertains to the influence of decreasing supplementation to transformation of chemical forms of Ni. Zn and Cu during composting of sewage sludge. A universally used supplementing material constituting a rich source of organic carbon is straw. Addition of straw to sewage sludge is aimed at increasing C/N proportion up to at least 15 due to the risk of formation of toxic forms of nitrogen, concentration of which in sewage sludge is exceptionally high. We have presented in this paper the results of speciation research of three elements applying Tessier’s sequential extraction. It’s been proven that decreasing of straw share in the composted mixture with sewage sludge down to the level of C/N value below the admissible value, has a beneficial effect on the allocation of tested heavy metals towards the forms that are permanently bound in compost matrix. A systematic increase of organic (IV) and residual (V) fractions share and decrease of mobile forms of heavy metals content in bioavailable fractions i.e. ion-exchange (I) and carbonate (II) has been ascertained.

Źródło:

Rocznik Ochrona Środowiska; 2021, 23; 580--593
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Air pollution with heavy metals compounds in Vinnytsia region, Ukraine

Autorzy:

Ishchenko, V.
Styskal, O.
Vasylkivsky, I.
Kvaterniuk, S.

Powiązania:

https://bibliotekanauki.pl/articles/402485.pdf

Data publikacji:

2014

Wydawca:

Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw

Tematy:

heavy metals
air pollution
emissions

Opis:

The dynamics of emission of heavy metals compounds into the air in Vinnytsia region (Ukraine) in 2003-2010 years is analyzed. The level of pollution for compounds of some heavy metals (Cd, Hg) has arisen, for others – has decreased (Pb, Cr) or has not changed (As, Ni). The sources of such pollution are defined according to the amount of the emissions of heavy metals compounds in different sectors of economy. In Vinnytsia region they include transport, industrial plants and municipal sector. Great quantity of transport and hazardous materials are consdered as the reasons of increasing of heavy metals emissions. Usage of more environment friendly resources (e.g. unleaded gasoline, natural gas instead of coal) is defined as the reason of reduction of heavy metals emission.

Źródło:

Structure and Environment; 2014, 6, 1; 33-37
2081-1500

Pojawia się w:

Structure and Environment

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Lokalna zmienność zawartości metali ciężkich w glebach okolicy Olkusza
Local variability in the content of heavy metals in soils in the region of Olkusz

Autorzy:

Trafas, M.
Eckes, T.
Gołda, T.

Powiązania:

https://bibliotekanauki.pl/articles/269314.pdf

Data publikacji:

2006

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

metale ciężkie
Olkusz
heavy metals

Opis:

W pracy omówiono wyniki badań gleb pola badawczego zlokalizowanego w rejonie olkuskim. Z pola o wymiarach 50 x 50 m pobrano próbki gleb z warstwy 0--20 cm w odstępach 10-metrowych jako próby pojedyncze, a poza tym pobrano próbę średnią z 30 nakłuć. Wykonano też 5 odkrywek, z których pobrano próbki z warstw o miąższości 5 cm do głębokości 20 cm i 10 cm do głębokości 80 cm. Określono ich podstawowe właściwości fizyczne (skład ziarnowy, gęstość objętościową) i chemiczne (pH w H2O i KCl, PEW, zawartość CaCO3, straty prażenia), a także zawartość metali ciężkich. Wyniki przeanalizowano pod kątem zmienności powierzchniowej, a także wpływu występujących w podłożu dolomitów kruszconośnych na rozmieszczenie metali ciężkich na różnych głębokościach w profilach glebowych. Stwierdzono, że gleby zawierają w warstwie powierzchniowej znaczne ilości Zn, Pb i Cd, których ilości zmniejszają się wraz z głębokością, lecz ponownie wzrastają w poziomach z domieszką gliniastej zwietrzeliny dolomitów. Sformułowano też uwagi dotyczące definicji zanieczyszczenia gleb i standardów jakości gleb.
In the paper the results of the survey on soils were presented The soil samples were located in a study field in the Olkusz region. Single samples were taken from the fields 50 x 50 m, layer 0-20 cm in distances of 10 meters. Apart from this a mean sample of 30 small samples was taken. There were also 5 excavations made from the layers of 5 cm thickness, up to 20 cm depth and 10 cm up to 80 cm depth. Their basic physical properties were defined (grain composition, volume density) as well as chemical properties (pH in H2O and KCl, PEW, content of CaCO3, losses at roasting) and the content of heavy metals. The results were analysed in terms of surface variability and the influence of ore-bearing dolomites on the distribution of heavy metals in soil profiles of different depth. It was found that, in the surface layers, the soils contained significant quantities of Zn, Pb and Cd. These quantities diminish with depth, but increase again in the levels with the addition of clay-like weathered dolomites. The comments on the definition of soil pollution and standards of soil quality were also made.

Źródło:

Inżynieria Środowiska / Akademia Górniczo-Hutnicza im. S. Staszica w Krakowie; 2006, 11, 2; 127-144
1426-2908

Pojawia się w:

Inżynieria Środowiska / Akademia Górniczo-Hutnicza im. S. Staszica w Krakowie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Phytoplankton Susceptibility Towards Toxic Heavy Metal Cadmium: Mechanism and Its Recent Updates

Autorzy:

Permana, Rega
Akbarsyah, Nora

Powiązania:

https://bibliotekanauki.pl/articles/1839870.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Cadmium
Heavy Metals
Phytoplankton
Toxicity

Opis:

Environmental pollution particularly heavy metal pollution into aquatic ecosystem has led to multiple damage in almost all life forms. Cadmium is one of the priority pollutant listed by United States Environmental Protection Agency or US EPA that widely known to have an adverse effect to organisms as well as human health. One type of organism that is susceptible to the effects of metal pollution is phytoplankton. Phytoplankton is a group of microalgae that are easy to find and are primary producers in aquatic environments. Phytoplankton plays an important role in aquatic ecosystems because they serve as primary producers. They are representing the water total primary productivity and reinforcing the aquatic life on the higher food chain. Thus, any threats that endangered the population of phytoplankton can lead to trophical cascade or even worse, biodiversity loss. The exposure of cadmium in high concentration to phytoplankton can lead to various impact including cell damage and disruption, biosynthesis inhibition of photosynthetic pigment (e.g. chlorophyll and carotenoid), chlorphyll degradation or known as chlorosis, thylakoid membrane degradation, inhibition of cellular metabolism and cell division. It is important to study the impact of cadmium to phytoplankton in a cellular level to better understand what mechanism lies and to what extent that the cadmium will be transferred to higher trophical organism via bioaccumulation or biomagnification.

Źródło:

World News of Natural Sciences; 2021, 38; 83-97
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

The Content of Heavy Metals in Bottom Sediments of Selected City Rivers of the Podlasie Province

Autorzy:

Skorbiłowicz, M.
Skorbiłowicz, E.
Górska, M.

Powiązania:

https://bibliotekanauki.pl/articles/124842.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

heavy metals
river
bottom sediments

Opis:

The purpose of the work was to determine the relationship between the state of the water environment quality of selected rivers (Zn, Cr, Pb, Cd and Cu tests in bottom sediments), and the sources of pollution resulting from the close proximity to the cities, through which they flow. The following rivers were selected for the study: the Biała river flowing through the city of Białystok, the Narew river flowing through the city of Tykocin and the village of Złotoria, the Supraśl river flowing through the village of Michałowo and Gródek as well as the Biała river flowing through the city of Bielsk Podlaski. The sediments were collected four times from the same points in 2016 in the period from July to October. The sediment samples were collected from the points located on rivers before and beyond towns and villages. The contents of the following metals were tested in the bottom sediment samples: Zn, Cr, Pb, Cd and Cu. The analyses were carried out applying the flame absorption spectrometry method. The statistical multivariate CA and FA analyzes were used. The highest contents of Zn, Pb and Cr were recorded in the bottom sediments from the following rivers: Biała (Białystok) and Biała inflow of Orlanka (Bielsk Podlaski), which resulted from the anthropogenic activity. The research also showed the impact of the agricultural activity due to the slightly elevated Cd level.

Źródło:

Journal of Ecological Engineering; 2018, 19, 4; 197-206
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Removal of Heavy Metals from Aqueous Solutions with the Use of Lignins and Biomass

Autorzy:

Miros-Kudra, Partycja
Sobczak, Paulina
Kopania, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/2171985.pdf

Data publikacji:

2022

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

heavy metals
adsorption
biosorbents
lignin

Opis:

The overproduction of pollutants resulting from the development of industry causes the deposition of large amounts of toxic and carcinogenic substances, including heavy metals, in the aquatic ecosystem and other ecosystems. This is a civilisation problem of the present times, posing a serious threat to the natural environment, including humans. For this reason, it has recently become extremely important to develop effective methods to minimise the concentration of heavy metal ions in the aquatic systems and thus reduce their negative impact on the environment. One such technique is adsorption, which is believed to be an effective method of removing contaminants such as heavy metal ions from aqueous solutions. Looking at the available literaturę of the last few years, it can be concluded that adsorbents of natural origin are becoming more and more important. These are agricultural waste, all kinds of biomass, and waste from various industries. The study attempts to present and evaluate the sorption capacity of materials of natural origin, including oat bran, chitosan, alginate, tree bark, coconut fibre, and lignin. The use of such biosorbents is more friendly for the environment compared to their synthetic counterparts and perfectly fits the concept of sustainable development and the circular economy.

Źródło:

Fibres & Textiles in Eastern Europe; 2022, 2 (151); 99--111
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

The effect of soil acidification on Cd and Pb precipitation

Autorzy:

Sari, D.
Morvai, B.

Powiązania:

https://bibliotekanauki.pl/articles/802266.pdf

Data publikacji:

1998

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

soil acidification
cadmium
lead
precipitation
heavy metal
sustainable environment
environment pollution
heavy metal accumulation

Opis:

A model for estimating the precipitation of Cd-, Pb- and As-sulphide in soils at various pH is presented. pH influences not only the solubility of heavy metal-sulphides but also on the distribution of the S atom among sulphide (S²⁻, SH⁻, H₂S) and sulphate (SO₄²⁻) species by the redox potential of the soil solution. The model, based on the Nerst-equation. considers the equilibrium of protolitic processes and complex ion formation. In order to test the model, a long term field experiment polluted with different levels of toxic heavy metals on Hungarian typical soils was performed. Coarse textured soils were treated with Cd. Pb and As salts at pH = 6.8 and 8 and after 6 months and 2 years the heavy metal precipitation was investigated. The Pb ion precipitated at pH = 8.0 and pH = 6.2 while Cd ion at pH = 8. The As ion did not show precipitation effect in any soil according to the majority of arsenate ions at the actual redox potential. Although the solubility of CdS (pK = 26.1) and PbS (pk = 26.6) is similar, the Cd concentration in the solution was higher than that of Pb. The difference between the two ion concentrations is interpreted by the stronger Pb ion adsorption to organic and inorganic soil constituents. It indicated that the adsorbed and complex ion should be considered for the prediction of precipitation.

Źródło:

Zeszyty Problemowe Postępów Nauk Rolniczych; 1998, 456
0084-5477

Pojawia się w:

Zeszyty Problemowe Postępów Nauk Rolniczych

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

The heavy metals in water of select Spitsbergen and Iceland glaciers

Autorzy:

Jóźwiak, M.

Powiązania:

https://bibliotekanauki.pl/articles/295268.pdf

Data publikacji:

2007

Wydawca:

Stowarzyszenie Geomorfologów Polskich

Tematy:

heavy metals
water
glacier
Spitsbergen
Iceland

Źródło:

Landform Analysis; 2007, 5; 32-34
1429-799X

Pojawia się w:

Landform Analysis

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

The Presence of Metals and Antibiotics Resistant Bacteria in Arable Manure Soils

Autorzy:

Erdem, B.
Dayangaç, A.
Şahin, İ.

Powiązania:

https://bibliotekanauki.pl/articles/1031124.pdf

Data publikacji:

2017-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

heavy metals
antibiotics
resistance
manure soils

Opis:

Heavy metals and antibiotics resistance are intense public interest owing to their pollution in the environment and potential deleterious effects on human health. A total of 15 isolates of Bacillus subtilis, Bacillus cereus, Pseudomonas aeruginosa and Escherichia coli (50 manure garden soils) were tested for their resistance against certain heavy metals and antibiotics. Minimum inhibitory concentrations of Pb²⁺, Co²⁺, Cu²⁺, and Zn²⁺ for each isolate were also determined. B. subtilis, B. cereus, P. aeruginosa and E. coli exhibited high tolerance to minimum inhibitory concentrations of 3,200 μg/ml for Pb²⁺, 400 μg/ml for Cu²⁺ and Co²⁺, and 100 μg/ml for Zn²⁺ in agar plates. All the isolates were highly resistant to lead and they showed 100% growth in 3,200 μg/ml concentration. It was observed that all isolates were resistant to a wide range of antibiotics namely clindamycin, ceftazidime, aztreonam and vancomycin.

Źródło:

Acta Physica Polonica A; 2017, 132, 3; 570-571
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Heavy metal accumulation in two peat bogs from southern Poland

Autorzy:

Fiałkiewicz-Kozieł, Barbara
Smieja-Król, Beata
Palowski, Bernard

Powiązania:

https://bibliotekanauki.pl/articles/2026703.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

heavy metals
variability
ombrotrophic peat bog

Opis:

The dy namic changes in se lected heavy metal con cen tra tions were an a lyzed in two ombrotrophic peat bogs from south ern Po land: Puoecizna Ma³a (PK) and Puoecizna Krauszowska (PM). The high est con tents of Pb and Zn oc cur at the top of pro files ex am ined: 115.36 mg/kg (PM1), 90.61 mg/kg (PM2), 182.40 mg/kg (PK1), 121.68 mg/kg (PK2) and 127.43 mg/kg (PM1), 89.73 mg/kg (PM2), 170 mg/kg (PK1), 130.4 mg/kg (PK2), re spec tively. Con cen tra tions of cop - per are sim i lar to those of lo cal soils vary ing from 9.4 to 12.8 mg/kg. Cad mium strongly var ies with depth, which in di - cates dis tinct mo bil ity of this el e ment. Two peaks of el e vated Fe con cen tra tions are ob served at the top and bot tom of the Puoecizna Ma³a pro file, while the max i mum in Puoecizna Krauszowska was at the top of the peat bog. The Ti con tent dis tinctly var ies with depth and cor re lates with the ash con tent (R2 = 0.91–0.99). The stron gest and pos i tive cor re la tion is ob served be tween Zn-Pb and Ti-Pb con tents. The sig nif i cant dif fer ences of metal con cen tra tions are noted be tween the pro files, which is prob a bly con nected with a rate of peat ac cu mu la tion and plant com po si tion of the pro files in ves - ti gated, as well as with their dis tur bance by hu man ac tiv ity.

Źródło:

Studia Quaternaria; 2011, 28; 17-24
1641-5558
2300-0384

Pojawia się w:

Studia Quaternaria

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Investigation of the process of adsorption of heavy metals in coastal sands containing micro-plastics, with special attention to the effect of aging process and bacterial spread in micro-plastics

Autorzy:

Seyfi, Sara
Katibeh, Homayoun
Heshami, Monireh

Powiązania:

https://bibliotekanauki.pl/articles/2073767.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

adsorption
aging
heavy metals
Erythrobacter
microplastics

Opis:

The chief purpose of this study is to investigate the process of adsorption of heavy metals in sands containing microplastics due to aging and bacterial culture. For this purpose, first, the experiment’s conditions were determined by reviewing previous studies and examining the effects of factors on the duration of bacterial culture and UV radiation. Finally, the test conditions were determined as follows: 25 g of adsorbent in 250 ml solution containing 50 mg/l of lead, cadmium, copper, zinc, chromium, and nickel, 750 micrograms of microplastic, bacterial culture time two days, aging time with UV light 14 days. Results of the study show that the addition of virgin microplastics has little effected on increasing the adsorbent strength, except in the case of nickel which reduces adsorption strength. The aging process increases the absorption of all studied metals by up to 60%. Bacterial culture without an aging process reduces the absorption of nickel and cadmium. Simultaneous use of bacterial culture and aging increases the adsorption power by up to 80% for all metals.

Źródło:

Archives of Environmental Protection; 2021, 47, 3; 50--59
2083-4772
2083-4810

Pojawia się w:

Archives of Environmental Protection

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Leachate Monitoring and an Assessment of Groundwater Pollution from the Tangier Landfill

Autorzy:

Elmaghnougi, Ikram
Tribak, Abdelghani Afailal
Maatouk, Mustapha

Powiązania:

https://bibliotekanauki.pl/articles/2105516.pdf

Data publikacji:

2022

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

leachate
pollution
groundwater
physicochemical
heavy metals

Opis:

Leachate from public landfill in the city of Tangier, which is neither collected nor treated, could constitute a probable source of pollution of the groundwater table and of those of the Mlalah and Khandak Bou Hajjar wadis in the east, and the Mghogha and Ghir Boudra wadis to the south. This work aims to analyze the level of contamination at Tangier’s municipal waste disposal. The leachate samples were collected and analyzed during the period from 2016 to 2019 and the physicochemical parameters (humidity, pH, organic matter, etc.) were determined on these samples as well as the contents of five heavy metals (lead, cadmium, iron, chrome and zinc). Analysis of the well water shows the presence of polluting elements in the leachate water and a high concentration of metals (especially iron) that exceeds standards. This makes the effluent extremely toxic and thus presents a permanent threat to the health of the local population and the surrounding environment.

Źródło:

Geomatics and Environmental Engineering; 2022, 16, 3; 111--130
1898-1135

Pojawia się w:

Geomatics and Environmental Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

The influence of silica functionalized with silanes on migration of heavy metals in soil

Autorzy:

Grzesiak, P.
Łukaszyk, J.
Gabała, E.
Kurczewska, J.
Schroeder, G.

Powiązania:

https://bibliotekanauki.pl/articles/777881.pdf

Data publikacji:

2016

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

functionalized silica
heavy metals
Soil stabilization

Opis:

3-Mercaptopropyl-trimethoxysilane and [3-(2-aminoethylamino)propyl]trimethoxysilane were used to functionalize the surface of silica from Piotrowice in Poland to stabilize heavy metals (HMs) and arsenic in soil. The soil for the study was sampled from the impact zone of Głogów Copper Smelter and Refinery. The soil samples were exposed to five-step Tessier sequential extraction. The speciation studies were limited to five sequentially defined fractions in which metal content was determined. The addition of unmodified silica did not affect significantly the concentration of metals in individual fractions. Significant changes were noted upon introduction of functionalized silica in the soil. The hybrid formulations obtained significantly reduce the release of heavy metals and arsenic from soil sorption complex. The results indicate the potential use of functional formulations for reduction of metal migration in soil in the areas of exceeded concentration of heavy metals and arsenic in the soil, caused by industrial activity.

Źródło:

Polish Journal of Chemical Technology; 2016, 18, 1; 51-57
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Remediation of heavy metals from soil using quartz sand functionalized with organic amino silanes

Autorzy:

Grzesiak, P.
Łukaszyk, J.
Schroeder, G.
Kurczewska, J.

Powiązania:

https://bibliotekanauki.pl/articles/777891.pdf

Data publikacji:

2013

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

quartz sand
heavy metals
soil stabilization

Opis:

The results of the research studies concerning the binding of heavy metals (HMs) by quartz sand functionalized with amino silanes have been described. The studies have been carried out on soils sampled from the areas affected by emissions from Copper Smelter and Refinery. The research aims to increase the food safety in the areas of industrial impact. The presence of polyamine chain in the hybrid materials obtained enables a binding of heavy metals (nickel, copper, cobalt). The best results are observed for the hybrid material having four amine groups (four coordination centers) per molecule. For this material the highest content after two extraction cycles (pH 7.0 and 5.0) is observed for copper (98.2%), but for other ions (nickel, cobalt) it is at least 85% of the initial amount of components available for plants.

Źródło:

Polish Journal of Chemical Technology; 2013, 15, 4; 116-120
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Preliminary assessment of agriculture influence on heavy metal content in bottom sediments of small water reservoirs and in rushes

Autorzy:

Szydłowski, K.
Podlasińska, J.

Powiązania:

https://bibliotekanauki.pl/articles/100909.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN

Tematy:

agriculture
ecology
heavy metals
sediments
ponds

Opis:

The main purpose of the paper was to determine the influence of catchment management on the bottom sediments quality of small water reservoirs as well as to determine toxic metal content in rushes. Samples of bottom sediments were collected in winter 2013 year, form 4 sediment layers (0-5, 5-10, 10-20 and 20-30 cm) at three points along the body of water. The 48 samples were collected. Soil material was prepared according to the procedures used in soil science, the analysis was performed for the fraction with a particle diameter of less than 1 mm. Plant samples from single species aggregations were randomly cut from 5 to 10 locations of 20-50 m2 area. From these samples the average composite sample was prepared. The total content of such elements as Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn was determined by atomic absorption spectrometry (using the Thermo Scientific iCE 3000 series spectrometer) after prior digestion in the mixture (5:1) of concentrated acids HNO3 (65%) and HClO4 (60%). Total Hg content was determined by the AMA 254 analyzer. Between the small water reservoirs adjacent to the areas where organic farming is used, and the reservoirs adjacent to the areas with mineral fertilization there are statistically significant differences in the concentrations of such metals as nickel (layers: 0-5, 5-10, 10-20 and 0-30 cm), as well as cobalt, chromium and iron (in a layer 5-10 cm). It has been found that some plants accumulate higher amounts of heavy metals (average values). Based on obtained results it can be stated that rushes actively captures large amounts of elements reaching studied objects and thereby protect the surface water of the reservoirs from contamination.

Źródło:

Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/1; 949-962
1732-5587

Pojawia się w:

Infrastruktura i Ekologia Terenów Wiejskich

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Accumulation of selected heavy metals in willow shoots (Salix viminalis L.) cultivated in the neighbourhood of a coal ash and slag landfill

Autorzy:

Mundała, P.
Szwalec, A.
Kędzior, R.

Powiązania:

https://bibliotekanauki.pl/articles/101175.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN

Tematy:

willow
landfill
bottom ash
heavy metals

Opis:

The aim of the study was to evaluate the contents of Cd, Pb, Zn and Cu in shoots of willow (Salix viminalis L.) cultivated in the vicinity of a coal ash and slag landfill. The landfill is surrounded by arable lands and meadows. There are two major negative influences of the landfill - dusting and flooding. The result of these interactions is the systematic reduction of agricultural value of the land. A field with an area of 9600 m2 were chosen. The land is located east to the landfill. A total of 40 samples of biomass was collected. The contents of analysed elements were determined by FAAS using a Unicam Solaar M6 spectrometer. Distance from the landfill affects the contents of Cd, Pb, Zn and Cu in the tested willow shoots. However, there is no single concentration pattern for all the investigated metals. An increase in willow cultivation on the described area can bring a good environmental effect and become an example of proper management of the ash and slag landfill neighbourhood.

Źródło:

Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/1; 1043-1051
1732-5587

Pojawia się w:

Infrastruktura i Ekologia Terenów Wiejskich

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

Combined Adsorption of the Copper and Chromium Cations by Clinoptilolite of the Sokyrnytsya Deposit

Autorzy:

Sabadash, Vira
Gumnitsky, Jaroslaw
Lyuta, Oksana

Powiązania:

https://bibliotekanauki.pl/articles/123357.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

copper
chromium
heavy metals
adsorption
zeolite

Opis:

In the paper, the assessment of the impact of heavy metals on water objects, namely copper and chromium was performed, and the methods for their neutralization were defined. A scientifically grounded method for the selection of natural zeolite for the purification of wastewater from heavy metals has been developed, provided that they are jointly present. The physicochemical characteristics of two metals related to heavy metals are presented: copper and chromium. The methods for determining the sorption capacity of natural zeolite for copper and chromium compounds, as well as the methods of analytical control of the wastewater components were presented. The results of the experimental studies on the combined adsorption of copper and chromium cations by natural zeolite under static conditions were presented. The changes in the chemical composition of the zeolite surface as a result of heavy metal sorption have been investigated. The influence of the nature of the ions and the pH of the adsorption medium on the selectivity of the heavy metal ions extraction by zeolite was analyzed. A diagram of the composition of the solution, depending on the pH values, was constructed. The pH of the beginning of deposition of the corresponding heavy metal hydroxides on the zeolite surface was calculated. While analyzing the results of experimental studies on the combined adsorption of copper and chromium ions, it was found that the copper ions are significantly better adsorbed by the sorbent than the chromium ions. Despite the same concentration of the chromium and copper ions in solution, Cu²⁺ is extracted selectively. As can be seen from the results of experimental studies, the concentration of copper on the surface of the sorbent increases from 0.628% mass at a concentration of 0.01 g/dm³ to 47.380% mass at a concentration of 1 g/dm³. The studies on the static activity of clinoptilolite for the copper and chromium ions indicate a simultaneous mechanism of the process, which involves ion exchange and physical adsorption. The concentration of the chromium ions on the surface of the sorbent after adsorption depends on the increase of the concentration of Cr³⁺ in the original solution to a lesser extent. The results of the studies on the combined adsorption of the Cu²⁺ and Cr³⁺ ions indicate the possibility of their chromatographic separation, which makes their further use possible.

Źródło:

Journal of Ecological Engineering; 2020, 21, 5; 42-46
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

Determination of Land Pollution with Heavy Metals along Sitnica River, Kosovo

Autorzy:

Abazi, Albona Shala
Sallaku, Fatbardh
Ukaj, Shkëlzim
Bytyçi, Pajtim
Spahiu, Mimoza Hyseni

Powiązania:

https://bibliotekanauki.pl/articles/123367.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

pollution
heavy metals
land
Sitnica river

Opis:

The main river of the Kosovo valley is the Sitnica River, which collects a large number of streams, recipients of wastewaterfrom various urban and industrial centers. The blockage of Sitnica river with waste and non-regulation of the bedding of this river makes this river flood tens of acres of worked ground surface through its course, causing great damage every spring and autumn. Uncontrolled discharge of heavy metals into the contaminated terrestrial environments ensures their transfer to plants, animals and humans and results in an impact on the environment and public health. Determination of the heavy metals concentration level for the assessment of soil pollution along the Sitnica River course was also the main purpose of this study, which was carried out in 2016. For analysis, 8 soil samples were taken at depths of 30–50 cm. From the analysis of the data it was noticed that the content of heavy metals such as Zn, Cd, Pb, Cr in some analyzed samples exceeds the maximum allowed values. The findings indicate high values of metal pollution in the samples taken in meadows as well as the agricultural lands stretching around the river.

Źródło:

Journal of Ecological Engineering; 2019, 20, 11; 23-28
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

Vermicomposting as an Alternative Method of Sludge Treatment

Autorzy:

Boruszko, Dariusz

Powiązania:

https://bibliotekanauki.pl/articles/123533.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

vermicomposting
sewage sludge
earthworms
heavy metals

Opis:

The article presents the results of the research from several years of exploitation of the vermiculture plots located in the municipal wastewater treatment plant in Zambrów. It is the only facility in Poland where the vermicompost from municipal sewage sludge has been produced continuously since 2004 (for 16 years). The results of tests of ready-made vermicomposts conducted regularly twice a year (32 tests) were subjected to a simple statistical analysis. The vermicompost analyses of heavy metals, biogenic compounds, organic matter and selected macroelements were compared with the requirements for mineral-organic fertilizers. In terms of the heavy metals content, the highest total content was observed in the first year of plots exploitation, i.e. in 2004, when it amounted to over 1200 mg^-1 kg DM. The lowest sum content of heavy metals in vermicomposts, amounting to 398 mg^-1 kg DM, was recorded in 2017. The median total content of heavy metals from all observations was 821 mg^-1 kg DM. During the whole research period, the content of nutrients in vermicomposts was high, for nitrogen it ranged from 9.8 g^-1 kg DM to 31.1 g^-1 kg DM (median 14.3 g^-1 kg DM), whereas for phosphorus it ranged from 2.1 g^-1 kg DM to 14.5 g^-1 kg DM (median 5.5 g^-1 kg DM). The content of organic matter in the whole several-year study period was high and ranged from 21.3% DM to 59.0% DM (median 33.1% DM). The conducted research confirmed that the use of California earthworm in the process of municipal sewage sludge vermicomposting results in its good mineralization and humification, and the final product (vermicompost) may be a valuable mineral-organic fertilizer.

Źródło:

Journal of Ecological Engineering; 2020, 21, 2; 22-28
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

Influence of charcoal calcination in field conditions on heavy metal content in plants and in the immediate vicinity of the retorts

Autorzy:

Orłowska, K.
Mierzwa-Hersztek, M.
Kopeć, M.

Powiązania:

https://bibliotekanauki.pl/articles/123693.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

charcoal
dry distillation
heavy metals
effect

Opis:

One of the ways of charcoal producing is its calcination in charcoal kilns called retorts in field conditions. In the charcoal production wood of deciduous trees is being subjected to the process of dry distillation. The process affects the surrounding environment. During the process a lot of pollutants are emitted to natural environment. One of them is ash, which contains heavy metals. The paper aimed at determining the effect of charcoal calcination on heavy metal content in the soil and plant material in the immediate vicinity. Charcoal calcination causes the alkalinization of the soil to 10 metres. In the closest vicinity, the calcination process increases Mn, Cd, Ni and Cu concentrations in the soil material. The influence of charcoal production on the concentrations Fe, Zn, Pb, Cr in soil material cannot be determined unanimously. The effect of the process on heavy metal content in plant material cannot be determined unanimously.

Źródło:

Journal of Ecological Engineering; 2014, 15, 1; 50-54
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

The Content of Heavy Metals in Waste as an Indicator Determining the Possibilities of Their Agricultural Use

Autorzy:

Łapiński, Dawid
Wiater, Józefa
Szatyłowicz, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/123784.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

heavy metals
digestate
ash
dried sludge

Opis:

The aim of the study was to evaluate the available waste in view of the heavy metals and fractions thereof. Three waste materials were analyzed in the work, namely dried, granular sludge, digestate from agricultural biogas plant and ash after combustion of biomass from the combined heat and power plant, in terms of the content of heavy metals in them. Their mobility through fractional analysis was determined and the possibilities of their agricultural use were assessed. The analyzed waste was varied due to the pH. Biomass ashes had the highest pH and it was alkaline. The pH of the dried precipitate was neutral and digestate was slightly alkaline. In the analyzed wastes, the content of permissible concentrations of heavy metals determined in the Regulation of the Minister of the Environment was not exceeded. The content of individual elements varied and depends on the type of waste tested. The conducted sequential analysis showed that various metal fractions are present in the tested wastes. The content of heavy metals in individual factions was varied and the content of mobile and potentially mobile fractions, i.e. metals of fractions I and II, was lower compared to the non-mobile fractions III and IV.

Źródło:

Journal of Ecological Engineering; 2019, 20, 4; 225-230
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

The Effect of Compost Made With Sewage Sludge on Heavy Metal Content in Soil and in Lolium Multiflorum Lam

Autorzy:

Malinowska, E.

Powiązania:

https://bibliotekanauki.pl/articles/124115.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

heavy metals
compost
Lolium multiflorum
soil

Opis:

The aim of this paper is to assess the effects of different doses of sewage sludge compost mixed with wheat straw on heavy metal content in Italian ryegrass and in soil. A two year experiment with the Italian ryegrass was set up in autumn 2012. The experimental design consisted of a control plot, a plot with NPK fertiliser and three plots with three different doses of municipal sewage sludge compost (5, 10 and 15 Mg of fresh matter·ha^-1). Those different compost doses contained the amounts of Nitrogen equivalent to 60, 120 and 180 kg·N.ha^-1. The two lower doses of compost were supplemented with nitrogen fertiliser so that the amount of this chemical element introduced to the soil of all plots with compost stood at 180 kg·ha^-1. During 2013 and 2014 seasons the grass was cut three times a year after about a 30-day growing period. After dry mineralisation, the content of Zn, Cu, Ni, Pb and Cd in the plant samples was measured with the ICP-AES method. The fertilisers applied significantly diversified the content of chemical elements in the grass and in the soil. The highest dose of compost resulted in the highest concentration of Zn, Cu and Cd in the grass while the highest concentration of Ni and Pb was in the soil and the grass from the plot where the mid dose of compost had been applied. Cadmium concentration in the soil was the highest in the plot where the mid dose was applied. The experiment proved that compost made with sewage sludge and wheat straw is beneficial for plants.

Źródło:

Journal of Ecological Engineering; 2016, 17, 3; 106-112
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Influence of Chemical Amelioration of Solonetzic Soils on the Presence of Heavy Metals and Radionuclides in Soil Profile

Autorzy:

Anatolievna, Guzeeva Svetlana

Powiązania:

https://bibliotekanauki.pl/articles/124832.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

phosphogypsum
amelioration
consequence
heavy metals
radionuclides

Opis:

The article considers the results pertaining to the influence of solonetzic soils chemical amelioration on the presence and redistribution of heavy metals and radionuclides in meter profile of soils. Meliorative procedures were carried out 45 years ago. Phosphogypsum has been used as chemical ameliorant up to 90-s on the solonetzic soils of Tyumen region. It is a by-product of phosphates production. The objective aimed at revealing possible negative consequences connected with the introduction of the chemical elements associated with phosphogypsum. The studies showed that phosphogypsum introduction contributes to some increase in the content of active forms of heavy metals (zinc Zn, copper Cu, cadmium Cd and lead Pb) in soil. However, critical values are achieved only by active lead Pb. The evaluation of radioactive state of meadow crusted solonetzic soils after carrying out of meliorative procedures (for the same period) on the content of isotopes of thorium-232 (Th-232), calium-40 (K-40), radium-226 (Ra-226), caesium-137 (Cs-137) and strontium-90 (Sr-90) indicated that redistribution of radionuclides after chemical melioration does not cause a negative change of radiation background. Vibrations in the soil profile are connected with various initial concentration in rock formations or weathering detritus. Specific effective activity (А_eff ≤ 370 Bq/kg) testifies to the soils being studied and absence of their additional introduction with introduced doses of phosphogypsum.

Źródło:

Journal of Ecological Engineering; 2019, 20, 5; 179-183
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Spatial Diversity Characterising Certain Chemical Substances in Sediments of Besko Reservoir

Autorzy:

Piwińska, D.
Gruca-Rokosz, R.
Bartoszek, L.
Czarnota, J.

Powiązania:

https://bibliotekanauki.pl/articles/125420.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

sediments
organic matter
phosphorus
heavy metals

Opis:

The article reports the conducted analyses of certain chemical parameters characterising the sediments of Poland’s Besko Reservoir. Specifically, determinations concerned the pH value, percentage organic matter (OM), total organic carbon (TOC), total nitrogen (TN), carbonates (CO₃^2-), total phosphorus (TP) and its fractions, as well as heavy metals (Fe, Al, Cr, Cu, Ni, Cd, Zn, Mn). The sediments have a slight alkaline reaction, with pH values correlating positively with the high content of carbonates. The sediments have low organic matter content, while organic carbon accounts for about 30% of OM. The values for the C:N ratio point to an allochthonous origin for organic matter. The analysis of phosphorus fractionation showed that inorganic phosphorus (IP) is predominant at every research station. The lowest percentage for a fraction was in turn obtained for NAIP. This testifies to a slight anthropogenic impact of the catchment area. The sediments can be classified as of the 2nd purity class (according to PIG), due to their highest concentration of chromium. According to Müller’s classification, the sediments can be classified as purity class 3 (i.e. with moderate contamination). The values noted for the EF coefficient confirm a very strong enrichment by chromium ions. In addition, chromium, copper, nickel and cadmium have a negative effect on aquatic organisms. The results show that the sediments can be used for example in building and maintaining hydraulic structures.

Źródło:

Journal of Ecological Engineering; 2018, 19, 1; 104-112
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

Assessment of heavy metals contents in bottom sediments of Bug river

Autorzy:

Skorbiłowicz, E

Powiązania:

https://bibliotekanauki.pl/articles/123129.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Bug river
bottom sediment
heavy metals

Opis:

The development of industry, agriculture, and transport contributes to an increased environmental pollution by heavy metals. The aim of the study was preliminary assessment of the contents of selected metals (lead, cobalt, copper, chromium, cadmium and nickel) in the sediments of Bug river. The study comprised part of the river flowing through Poland. It was found that the Bug river sediments are not contaminated in respect to the content of tested metals. Based on the analysis of the study results, these metals can be lined up in the following order: Cr > Pb > Cu > Ni > Co > Cd. Statistical analysis showed that copper and chromium occur in Bug river sediments in forms bindings with organic matter in majority of cases. The granulometric analysis of sediments from Bug river revealed the largest percentage of two fractions: 1.0–0.2 mm with average of 47.7 ± 19.77% and 0.2–0.1 mm with average of 20.6 ± 7.7%. These are the dominant fractions with the accumulation of metals in river sediments, which has been confirmed by statistical analysis.

Źródło:

Journal of Ecological Engineering; 2014, 15, 3; 82-89
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

Cyclical metal adsorption and desorption through sludge immobilized in chitosan media

Autorzy:

Kuczajowska-Zadrożna, Małgorzata
Filipkowska, Urszula
Jóźwiak, Tomasz
Szymczyk, Paula

Powiązania:

https://bibliotekanauki.pl/articles/1034744.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe

Tematy:

adsorption
chitosan
desorption
heavy metal
immobilization

Opis:

In this research, a cyclical adsorption/desorption of cadmium and zinc from solutions containing a single metal or its mixture in ratio of 1:1 and 1:2 using immobilized activated sludge in the chitosan (ASC) was examined. In the adsorption studies, the optimal dose of ASC was 4 g/L. The highest desorption efficiency was achieved for 1M HNO3. Both adsorption and desorption occurred in accordance with a pseudo-second order reactions which is confirmed by R2 values. Mass of zinc adsorbed and desorbed in one cycle from a solution containing a single metal was 0.78 and 0.40 mmol/g d.w. when cadmium was lower (respectively 0.41 and 0.21 mmol/g d.w.). In subsequent cycles, both metals were adsorbed and desorbed at a lower efficiency. The highest efficiency of desorption was observed for a mixture of Cd:Zn in the ratio of 1:1 and 1:2, respectively 86% and 89% of cycle1, whereas for the zinc it was 70% and 53%. Desorption efficiency of both metals and its mixtures, in subsequent cycles gradually decreased.

Źródło:

Progress on Chemistry and Application of Chitin and its Derivatives; 2016, 21; 135-146
1896-5644

Pojawia się w:

Progress on Chemistry and Application of Chitin and its Derivatives

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

Biosorption/desorption of cadmium(ii) and zinc (ii) from aqueous solutions by activated sludge immobilized onto chitosan beads

Autorzy:

Kuczajowska-Zadrożna, Małgorzata
Filipkowska, Urszula
Jóźwiak, Tomasz
Szymczyk, Paula

Powiązania:

https://bibliotekanauki.pl/articles/1035015.pdf

Data publikacji:

2015

Wydawca:

Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe

Tematy:

adsorption
chitosan beads
desorption
heavy metal

Opis:

In this study, we evaluated the effectiveness of cadmium and zinc adsorption and desorption from solutions containing single metals and a mixture of metals in the ratio of 1:2 by activated sludge immobilized onto chitosan (ASC). The optimal pH value determined for metals adsorption ranged from pH 5 to pH 6, whereas that established for desorption reached pH 2. In the case of individual metals, the state of adsorption equilibrium in the solution was achieved after 180 min, whereas in the case of a metal mixture – after 270 min. In the case of desorption, the state of equilibrium was achieved after 45 min. It was stated that both adsorption and desorption proceeded according to the pseudo-second order reaction. The study enabled determining the maximum adsorption capacity based on Langmuir, Freundlich and Sips models. The Sips model was found suitable for the description of adsorption of single metals onto ASC, whereas both Sips and Freundlich models – for description of the adsorption of a metal mixture, which was indicated by the determined values of R2 coefficient. The adsorption capacity of ASC determined from Sips model for individual solutions of cadmium and zinc reached 216 and 188.3 mg/g d.m., respectively, whereas that determined for their mixture reached 106 mg/g d.m. for both metals.

Źródło:

Progress on Chemistry and Application of Chitin and its Derivatives; 2015, 20; 142-155
1896-5644

Pojawia się w:

Progress on Chemistry and Application of Chitin and its Derivatives

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 63.

Tytuł:

Heavy Metals Contamination of Local and Imported Rice in Semarang, Central Java, Indonesia

Autorzy:

Wahyuningsih, Nur Endah
Setiawan, Henry
Nabiha, Puteri Inandin
Kartasurya, Martha Irene
Azam, Mahalul

Powiązania:

https://bibliotekanauki.pl/articles/27323834.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

pH
heavy metals
rice
local
import

Opis:

This study defined the heavy metal concentration in rice, a commonly consumed staple food in Indonesia that is domestically produced and also imported from other countries due to its high demand. A total of six rice samples, comprising of four domestic and two foreign were randomly taken from Semarang stores and analyzed using the Atomic Absorbance Spectrometer (AAS). The laboratory results revealed that three varieties of rice, two from Indonesia (MW and PW; 0.561 and 0.456 mg/kg, each), and one from the United States (B; 0.307 mg/kg), exceeded the Indonesian dietary standard for lead (Pb) (SNI). Furthermore, the concentration of chromium (Cr) in two rice that are imported (B, 0.241 mg/kg and J, 0.723 mg/kg) were greater than the 0.2 mg/kg threshold established by the Chinese government. However, all samples had acceptable levels of As and Hg, and none had detectable levels of Cd. In terms of pH levels, domestically produced rice had a wider range (3.88–5.78) compared to imported rice (4.96–5.68). Although locally grown and imported rice had acceptable levels of LCR, only one local rice sample and two imported rice samples exceeded the Target Hazard Quotient (THQ) as well as Hazard Index (HI) values. In conclusion, consuming heavy metals contamination rice on a regular basis poses carcinogenic as well as non-carcinogenic health risks.

Źródło:

Journal of Ecological Engineering; 2023, 24, 7; 49--60
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

Heavy Subgraphs, Stability and Hamiltonicity

Autorzy:

Li, Binlong
Ning, Bo

Powiązania:

https://bibliotekanauki.pl/articles/31341693.pdf

Data publikacji:

2017-08-01

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

heavy subgraphs
hamiltonian graphs
closure theory

Opis:

Let G be a graph. Adopting the terminology of Broersma et al. and Čada, respectively, we say that G is 2-heavy if every induced claw (K1,3) of G contains two end-vertices each one has degree at least |V (G)|/2; and G is o-heavy if every induced claw of G contains two end-vertices with degree sum at least |V (G)| in G. In this paper, we introduce a new concept, and say that G is S-c-heavy if for a given graph S and every induced subgraph G′ of G isomorphic to S and every maximal clique C of G′, every non-trivial component of G′ − C contains a vertex of degree at least |V (G)|/2 in G. Our original motivation is a theorem of Hu from 1999 that can be stated, in terms of this concept, as every 2-connected 2-heavy and N-c-heavy graph is hamiltonian, where N is the graph obtained from a triangle by adding three disjoint pendant edges. In this paper, we will characterize all connected graphs S such that every 2-connected o-heavy and S-c-heavy graph is hamiltonian. Our work results in a different proof of a stronger version of Hu’s theorem. Furthermore, our main result improves or extends several previous results.

Źródło:

Discussiones Mathematicae Graph Theory; 2017, 37, 3; 691-710
2083-5892

Pojawia się w:

Discussiones Mathematicae Graph Theory

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 65.

Tytuł:

Organic Soil Amendments: Potential Source for Heavy Metal Accumulation

Autorzy:

Ganesh, K. Sankar
Sundaramoorthy, P.
Nagarajan, M.

Powiązania:

https://bibliotekanauki.pl/articles/1193967.pdf

Data publikacji:

2015

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Biofertilizers
Bioremediation
Growth
Heavy metals
Yield

Opis:

Effects of heavy metals on plants result in growth inhibition, structure damage, a decline of physiological and biochemical activities as well as of the function of plants. The effects and bioavailability of heavy metals depend on many factors, such as environmental conditions, pH, and species of element, organic substances of the media and fertilization, plant species. But, there are also studies on plant resistance mechanisms to protect plants against the toxic effects of heavy metals. The microorganisms act in synergism with the plants for effective phytoremediation. This synergistic relationship promotes the exchange of water and nutrients established between plant roots and specialized soil microorganisms thus, enhancing the plant growth. The application of microorganisms in phytoremediation helps to improve plant growth and survival rate. The microbial activity in the contaminated site acts as an indicator for the plant growth and bioremediation. So an attempt were made on the toxic effects of chromium in paddy plants growth and yield and thereby mitigating its toxicity by using microbial inoculants especially Azospirillum.

Źródło:

World Scientific News; 2015, 16; 28-39
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

Assessment of some heavy metals in the selected freshwater fish species collected from Veeranam Lake Cuddalore District, Tamil Nadu, India

Autorzy:

Ambedkar, G.
Kmalakkannan, J.
Muniyan, M.

Powiązania:

https://bibliotekanauki.pl/articles/1178333.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Freshwater Fish
Heavy metals
Veeranam Lake

Opis:

The present study was conducted to assessment the some heavy metals, chromium, cadmium, copper, lead, iron, zinc and manganese concentrations in gill, liver, kidney, intestine and muscle of the selected freshwater fish Tilapia mossambica, Claris batrachus, Labeo rohita, Mystus vittatus and Cyprinus carpio communis of the Veeranam Lake Cuddalore district, Tamilnadu, India collected between January 2010- December 2010. Heavy metals concentrations varied in significantly depending upon the type of fish tissues and locations. In the selected freshwater fish, liver tissues appeared to have significantly highest level of chromium followed by Cd, Cu, Pb, Fe, Zn and Mn. The maximum level of chromium in liver tissue followed by the gill, kidney and intestine was found in the of Tilapia mossambica, Claris batrachus, Labeo rohita, Mystus vittatus and Cyprinus carpio communis while the minimum level of manganese was observed in the muscle tissue of Tilapia mossambica, Claris batrachus, Labeo rohita, Mystus vittatus and Cyprinus carpio communis. These levels of metals higher in the fish tissue may be due to increased fertilizers, agricultural wastes, industrial effluents and some anthropogenic activities high in the investigated area.

Źródło:

World Scientific News; 2017, 81, 2; 235-245
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Seasonal variation in heavy metal distribution in the sediments of selected dams in Nasarawa State, Nigeria

Autorzy:

Gav, B. L.
Aremu, M. O.
Etonihu, A. C.

Powiązania:

https://bibliotekanauki.pl/articles/1109614.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Dams
Heavy metal
Seasonal variations
sediments

Opis:

The study was carried out to ascertain seasonal variation in heavy metal distribution in sediments from Dams located in Nasarawa State, Nigeria. Sediment samples were collected twice each at two different seasons for two years from May to September, 2014 and November-December, 2014 to March, 2015 for wet and dry seasons, respectively. Similarly, sediment samples were collected from May to September, 2015 and November-December, 2015 to March, 2016 for wet and dry seasons, respectively. The samples were then assessed for heavy metal properties, using atomic absorption spectrophotography (AAS). Analysis of variance (ANOVA) was then applied. The mean results of the heavy metal levels showed high values in dry seasons and low values in wet seasons in the two years of the study. Herein, the results of ANOVA revealed significant difference in the heavy metal concentrations between the seasons, dams and years. Our study also indicated that for heavy metals, the levels determined in sediments were within the WHO acceptable standards, except for Pb and Mn. These exceeded the WHO acceptable standards for drinking water. Based on these results, the dam waters are, therefore, polluted and unsuitable for human consumption, except after treatment.

Źródło:

World News of Natural Sciences; 2018, 20; 148-159
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

Assessment of Heavy Metal Concentration of Groundwater in Veppanthattai Block, Perambalur District, Tamil Nadu

Autorzy:

Ibraheem, A. Mohamed
Mazhar Nazeeb Khan, S. M.

Powiązania:

https://bibliotekanauki.pl/articles/1113912.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

AAS
Groundwater
Heavy metal
Veppanthattai
WHO

Opis:

The current study was aimed to find out the heavy metal concentration of groundwater in the Veppanthattai block. Here, 45 water samples from different sites were collected during the year 2015 at post monsoon, and Cd, Cr, Cu, Fe, Ni, Pb and Zn heavy metal content was analyzed using an atomic absorption spectrophotometer (AAS), The obtained results were then compared with the WHO standard for the specific highest pollution level. Accordingly, some or all water samples are above the permissible limit, particularly for Cd metal (all samples). The elevated concentration of cadmium in water samples of the study area may be due to agricultural runoff, as pesticides and cadmium-containing fertilizer have been used. The study showed that without proper treatment, the groundwater of the study area is not suitable for domestic applications.

Źródło:

World News of Natural Sciences; 2017, 12; 21-26
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Evaluating the Behavior of Metals in soil environment

Autorzy:

Draszawka-Bołzan, Beata
Cyraniak, Emil

Powiązania:

https://bibliotekanauki.pl/articles/1118209.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Heavy metal
Soil sorption
sorption study

Opis:

Metals added to soil will normally be retained at the soil surface. Movement of metals into other environmental compartments, i.e., ground water, surface water, or the atmosphere, should be minimal as long as the retention capacity of the soil is not exceeded. The extent of movement of a metal in the soil system is intimately related to the solution and surface chemistry of the soil and to the specific properties of the metal and associated waste matrix. The retention mechanisms for metals added to soil include adsorption of the metal by the soil solid surfaces and precipitation. The retention of cationic metals by soil has been correlated with such soil properties as pH, redox potential, surface area, cation exchange capacity, organic mater content, clay content, iron and manganese oxide content and carbonate content. Anion retention has been correlated with pH, iron and manganese oxide content and redox potential. In addition to soil properties, consideration must be given to the type of metal and its concentration and to the presence of competing ions, complexing ligands, and the pH and redox potential of the soil-waste matrix.

Źródło:

World News of Natural Sciences; 2017, 9; 19-34
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

Concentration of heavy metals in the soil and translocation with phytoremediation potential by plant species in military shooting range

Autorzy:

Magaji, Y.
Ajibade, G. A.
Yilwa, V. M. Y.
Appah, J.
Haroun, A. A.
Alhaji, I.
Namadi, M. M.
Sodimu, A. I.

Powiązania:

https://bibliotekanauki.pl/articles/1157708.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Heavy metals
Physicochemical parameters
Phytoremediation
Translocation

Opis:

Concentration of seven (7) metals (Pb, Cu, Zn, Mu, Ni, Cr, and Cd) in the samples of soil and some plant species collected from Kachia military shooting range were determined. The mineral ions were assayed using the acid digestion method and atomic absorption spectrophotometry (AAS). Physicochemical parameters (pH, EC, Bulk density, water holding capacity and Total Nitrogen) of the soil samples were also determined. Of the 7 metals determined in the soils samples, the concentration of Pb (14.85 ± 6.78 mg/kg-1) was the highest compared to the concentrations of other metals. Physicochemical parameters were within the range that allows effective phytoremediation. Cu showed the lowest concentration (0.55 ± 1.68 mg/kg-1). Ni was below the detectable limit in most of the samples. Similarly, concentrations of Pb (12.30 mg/kg-1) in the shoot of Albizia zygia among other metals were higher than those of the other metals in the plant tissues. Concentration of Cd (0.07 mg/kg-1) in the root of Eragotis tremula was the lowest. Generally, metal ion concentration in the soil and plant samples of the shooting range (polluted site) significantly) differed from those of the non-polluted site (P<0.05). Combretum hispidium among the plant species had the highest translocation factor (TF = 2.91). Although the TF was higher in the plant of the polluted site TF >1), reasonable amount of them were retained within the underground tissues (roots).

Źródło:

World Scientific News; 2018, 92, 2; 260-271
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

Hydrochemiczne konsekwencje zasilania zbiorników przepływowych wodami zanieczyszczonymi
Hydrochemical consequences of feeding flow-through reservoirs with contaminated water

Autorzy:

Jaguś, A.
Rzętała, M.

Powiązania:

https://bibliotekanauki.pl/articles/1819396.pdf

Data publikacji:

2012

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

surface sediments
quality
lake
heavy metals

Opis:

The research concerned flow-through reservoirs fed with contaminated river water. The aim of the research was to recognize the impact of reservoirs on fluvial transportation of contaminants. Three reservoirs, situated in the Upper-Silesian region (southern Poland) and operating in different environmental conditions, were selected for the research: Pogoria I reservoir - operating in the quasi-natural direct catchment (with fluvial load of industrial-municipal wastewater), Przeczyce reservoir - under agricultural anthropopressure, and Dzierzno Due reservoir - under urban-industrial anthropopressure. The research included analyses of the quality of river water flowing into and leaving the reservoirs and calculation of contaminant loads at the inflows and outflows. The research showed that Pogoria I reservoir neutralised inflowing contaminants, thus purifying the river water. Nitrogen and phosphorus compounds were particularly efficiently retained. Electrolytic conductance of water in Pogoria was reduced by up to 50%. Przeczyce reservoir was alimented with eutrophic water (especially rich in biogenic elements) from agricultural land. The reservoir accumulated contaminants at the initial stage of the research. After several years, however, it started releasing some of the accumulated substances, causing an increase in contamination of river water with e.g. organic substances. The data concerning Przeczyce reservoir revealed that reservoirs can purify water from some substances and simultaneously cause an increase in contamination with other substances. Selectivity of hydrochemical impact of reservoirs was particularly visible in case of Dzierzno Due reservoir, which received wastewater from the urban-industrial catchment. It largely reduced the loads of suspended matter, phosphates or zinc, among other substances, at the same time causing secondary contamination with substances like ammonia, lead or cadmium. The results of the research show individuality of reservoirs in terms of their impact on fluvial transportation of substances. It might be believed, however, that each reservoir which is fed with contaminated water will have at least partly (selectively) contaminating impact in the course of time. That should be related to increasing eutrophication in conditions of limited capacity of accumulation of contaminants in the limnic environment. Detailed assessment of transfer of substances by a particular reservoir would require individual research for that reservoir.

Źródło:

Rocznik Ochrona Środowiska; 2012, Tom 14; 632-649
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 72.

Tytuł:

Synthesis of hydroxyapatite derived from agricultural waste and its applications as an adsorbent for heavy metal removal from wastewater

Autorzy:

Kalbarczyk, Marta
Szcześ, Aleksandra

Powiązania:

https://bibliotekanauki.pl/articles/2079904.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej

Tematy:

hydroxyapatite, eggshell, adsorption, heavy metal, wastewater

Opis:

 The presence of heavy metals in aquatic systems can be harmful to living species. Heavy metals are not biodegradable, and their tendency to accumulate in living organisms often causes different, undesirable consequences. Therefore, removing these impurities from wastewater has become one of the key issue related to environmental protection [Babel and Kurniawan 2004].There are many methods developed to remove heavy metals from wastewater and adsorption is one of the most popular one. Despite of the diversity of these technologies there is still a need to develop methods that do not require a large financial input [Hegazi 2013, Renu et al. 2017].The most important features that determine materials used as adsorbent is their low cost, biocompatibility and environmental friendly nature and hydroxyapatite presents all of them. Moreover, hydroxyapatite particles are characterized by high specific surface area and simple method of synthesis. It is also reported that it can be obtained from agricultural waste based on calcium like eggshells [Akram et al. 2014].The aim of this paper is to show and compare different methods of hydroxyapatite synthesis using eggshells as a source of calcium and it sorption capacity due to different metal cations from aqueous solution.

Źródło:

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2019, 74, 2; 53-68
2083-358X

Pojawia się w:

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 73.

Tytuł:

Nickel in the environment

Autorzy:

Harasim, P.
Filipek, T.

Powiązania:

https://bibliotekanauki.pl/articles/14480.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

environment
nickel
micronutrient
heavy metal
allergen

Opis:

The importance of nickel (Ni) in the environment is an issue that is gaining broader recognition. While nickel is an element essential for plants, it is also a heavy metal. Nickel is a component of nine metalloenzymes, including urease, which participates in urea hydrolysis. It also helps some plants to protect themselves against pathogens and herbivorous insects. There are many sources of Ni in the environment, which can be a problem because at higher concentrations this element is toxic to plants and other living organisms. Therefore, standards have been defined for the Ni content in air, water, soil and plants. Its content is monitored in the air. More and more frequently, attention is paid to this element as an allergen in humans. In the world, attempts have been made to phytoextract nickel from contaminated soils using nickelphilous plants, the so-called hyperaccumulators, and even to recover the metal from these plants by so-called phytomining. On the other hand, nickel-containing fertilizers are marketed and used in cases of nickel deficiency in plants. In industry, this element is primarily used for the production of steel and alloys. The most recent application of nickel is related to graphene, which was invented 10 years ago. Although nickel contamination does not occur in Poland, we cannot rule out this risk in the future. Thus, it is important to monitor the fate of nickel in the environment.

Źródło:

Journal of Elementology; 2015, 20, 2
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 74.

Tytuł:

Zinc, Copper and Chromium Content in Soils and Needles of the Scots Pine (Pinus silvestris L.) from the Krakow Agglomeration Terrain
Zawartość cynku, miedzi i chromu w glebach oraz szpilkach sosny zwyczajnej (Pinus silvestris L.) z terenu aglomeracji krakowskiej

Autorzy:

Arasimowicz, M.
Niemiec, M.
Wiśniowska-Kielian, B.

Powiązania:

https://bibliotekanauki.pl/articles/388254.pdf

Data publikacji:

2010

Wydawca:

Towarzystwo Chemii i Inżynierii Ekologicznej

Tematy:

heavy metals
soils
pine needles
bioaccumulation

Opis:

The aim of the study was to determine soils pollution by heavy metals (Zn, Cu and Cr) and their content in pine needles taken from terrain of Krakow Agglomeration. It was found large changeability of individual trace metals content in analyzed plants and soils material. The metals content in soils amounted to: 12.64–631.9 mg Zn, 1.24–35.06 mg Cu and 2.39–158.9 mg Cr kg–1 dm. The average content of zinc, copper and chromium in soil samples from the city of Krakow terrain was visibly higher than in the analogous material taken from neighboring localities. Variation coefficients of individual trace elements content were: 102.8 % for Cr, 72 % for Zn and 54.2 % for Cu. The highest amounts of analyzed heavy metals was found in soils from places of Krakow Agglomeration located in zones of large intensity of road traffics and in Old Town where the influence of anthropopressure lasts the longest. High their contents were observed also in soil samples taken from the periphery of Krakow and in localities with dense one-family buildings situated along the main traffic routes. The relatively low content of these metals in soils were observed in multifamily dwelling housing estates and in smaller villages from the periphery of the Agglomeration. On average, the most pollution of studied soils with Cu and Zn was found in the eastern part of the Agglomeration, while the lowest in western one. The highest average Cr content was observed in the soil samples taken from northern part of the Krakow Agglomeration while the lowest in southern part. Contents of zinc and copper in soil were significant positively correlated with organic matter content in soil. The average contents of analyzed trace metals in pine needles taken from the city of Krakow terrain and from neighboring localities were differed slightly. The average content of these metals in pine needles from the Agglomeration terrain amounted to: 55.45 mg Zn, 4.76 mg Cu and 2.54 mg Cr kg–1 d.m. Individual metals content in plant was differentiated in diverse extent. The largest variation was found in case of Cr (V = 40 %), lower for Zn (V = 30.8 %), and the lowest in case of Cu (26.4 %). The highest average analyzed heavy metals content was found in needles of pine grown in southern part of the Krakow Agglomeration. The smallest Cu and Cr contents were observed in needles taken from the trees grown in northern part of the city and neighboring localities, while the smallest Zn content was noted in samples from the northern part of the Krakow Agglomeration. Obtained results did not prove a substantial correlation between heavy metals content in soil and in pine needles, what points at origin of Zn, Cu and Cr from deposition from the atmosphere. The bioaccumulation coefficients of analyzed elements had higher values in case of samples taken from countryside than those taken from city Krakow terrain.
Celem pracy było okreoelenie zanieczyszczenia gleb metalami ciężkimi (Zn, Cu i Cr) oraz ich zawartooeci w szpilkach sosen z terenu aglomeracji krakowskiej. Stwierdzono duże zróżnicowanie zawartooeci poszczególnych metali oeladowych w analizowanym materiale glebowym i rooelinnym. Gleby zawierały: 12,64–631,88 mg Zn, 1,24–38 mg Cu oraz 2,39–158,9 mg Cr kg–1 s.m. OErednie zawartooeci cynku, miedzi i chromu w próbkach glebowych z terenu miasta Krakowa były wyższe niż w analogicznym materiale pobranym z okolicznych miejscowooeci. Współczynniki zmiennooeci zawartooeci poszczególnych metali przyjmowały wartooeci: 102,8 % dla Cr, 72 % dla Zn i 54,2 % dla Cu. Najwięcej metali zawierały gleby pobrane z punktów aglomeracji krakowskiej, zlokalizowanych w rejonach o dużym natężeniu ruchu drogowego oraz na terenie Starego Miasta, które najdłużej podlegają antropopresji. Duże ich zawartości zanotowano także w próbkach gleb pobranych na obrzeżach Krakowa oraz w miejscowościach o zwartej zabudowie domów jednorodzinnych, usytuowanych przy głównych szlakach komunikacyjnych. Stosunkowo mało tych metali zawierały gleby z osiedli o zabudowie wielorodzinnej oraz z mniejszych wsi położonych na obrzeżach aglomeracji. Średnio największe zanieczyszczenie badanych gleb Zn i Cu stwierdzono we wschodniej częoeci aglomeracji, a najmniejsze w częoeci zachodniej. Największą średnią zawartością Cr odznaczały się gleby z północnej, a najmniejszą z południowej częoeci aglomeracji krakowskiej. Zawartość cynku i miedzi w glebie były istotnie dodatnio skorelowane z zawartością materii organicznej. Średnie zawartości badanych metali śladowych w szpilkach sosen pobranych z terenu miasta Krakowa oraz z pobliskich miejscowości różniły się nieznacznie. Przeciętna zawartość tych metali w igliwiu sosen rosnących na terenie aglomeracji wyniosła: 55,45 mg Zn, 4,76 mg Cu i 2,54 mg Cr kg–1 s.m. Zawartości poszczególnych metali ciężkich były zróżnicowane w niejednakowym stopniu. Największą zmienność stwierdzono w przypadku Cr (V = 40 %), następnie Zn (V = 30,8 %), a najmniejszą w przypadku Cu (26,4 %). Średnio najwięcej wszystkich analizowanych metali stwierdzono w szpilkach sosen rosnących w południowej części aglomeracji krakowskiej. Najmniej Cu i Cr zawierały igły pobrane z drzew z północnej części miasta oraz z graniczących z nią miejscowości, natomiast najmniejszą zawartość Zn zanotowano w próbkach pobranych w północnej części aglomeracji. Nie wykazano statystycznie istotnej korelacji między zawartością badanych metali w glebie i igliwiu sosny, co wskazuje na ich pobieranie z depozycji z atmosfery. Współczynniki bioakumulacji badanych metali przyjmowały znacznie większe wartości w przypadku próbek pobranych na terenach wiejskich w porównaniu z pobranymi na terenie miasta Krakowa.

Źródło:

Ecological Chemistry and Engineering. A; 2010, 17, 12; 1543-1552
1898-6188
2084-4530

Pojawia się w:

Ecological Chemistry and Engineering. A

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 75.

Tytuł:

A survey of multiplicity fluctuations in PHENIX

Autorzy:

Mitchell, J.

Powiązania:

https://bibliotekanauki.pl/articles/148455.pdf

Data publikacji:

2006

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

fluctuations
multiplicity
relativistic heavy-ion collisions

Opis:

The PHENIX Experiment at the Relativistic Heavy Ion Collider has made measurements of event-by-event fluctuations in the charged particle multiplicity as a function of collision energy, centrality, collision species, and transverse momentum in heavy-ion collisions. The results of these measurements will be reviewed and discussed.

Źródło:

Nukleonika; 2006, 51,suppl.3; 89-92
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 76.

Tytuł:

Examination of heavy-ion collisions using EPOS model in the frame of BES program

Autorzy:

Stefaniak, M.

Powiązania:

https://bibliotekanauki.pl/articles/227252.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

BES program
heavy-ion collisions
EPOS

Opis:

EPOS is a generator which allows one to simulate various types of collisions of divers systems with different initial parameters. It considers the parton-based Gribov-Regge theory. So far the EPOS model has been used to describe higher collision energies obtained with RHIC or LHC data. On the other hand, there is another program under investigation: Beam Energy Scan conducted at Brookhaven National Laboratory. The beams of gold ions are collided at energies such as √_sNN - 7:7; 11:5; 19:6; 27; 39, and 62.4 GeV in order to collect and analyze data needed in examination of QGP Phase Diagram. The EPOS model could become a useful tool in such studies. Simulated with EPOS data will be verified using elliptic flow analyses and two-particles femtoscopic correlations, which allow one to measure the size of sources determined by newly created particle.

Źródło:

International Journal of Electronics and Telecommunications; 2018, 64, 1; 65-70
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 77.

Tytuł:

Application of Assessment Models for Health Risk and Pollution from Surface Water from Okumpi River in Nwangele, Imo State, Nigeria

Autorzy:

Chukwuemeka, Ihenetu Stanley
Obinna, Njoku Victor
Chizoruo, Ibe Francis

Powiązania:

https://bibliotekanauki.pl/articles/1840785.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Environment
Health
Heavy-metal
Metals
Water

Opis:

The mean and standard deviation of pH value in the present study during the wet and dry seasons varied from 6.21±0.22 - 5.75±0.41. The mean and standard deviation of EC in the current study ranges between 219.15±12.20 - 193.30±14.81 μS/cm for wet and dry seasons which are found to be in line with the WHO standard used. The mean and standard deviation of DO for this study during the wet and dry seasons were found to be 10.03±0.58 - 6.47±0.41 (mg/L). TDS for wet and dry seasons ranges from 374.79 ±5.33 - 121.65 ±6.33 mg/L. The nitrate [9.05 ±1.08 - 8.09 ±1.57], sulphate [3.91 ±0.51 – 3.73 ±0.46] and phosphate [82.78 ±3.86 - 81.76±3.32] in this present study for wet and dry season were all found to be below the standard. The Hazard quotient via ingestion and Hazard quotient via dermal has a reduction in the order of lead > nickel > iron > manganese > copper > zinc and lead > zinc > nickel > copper > iron > manganese > cadmium, in cooperation in children and adults in wet season, correspondingly. The Hazard quotient via ingestion and Hazard quotient via dermal has a decrease in the following order of nickel > lead > manganese > copper > iron > zinc and lead >zinc > nickel > copper > manganese > iron > for both children and adults in dry season, respectively. Lead possess carcinogenic risk for the inhabitants of this area due to the value of the carcinogenic risk n wet season of 4.05E-4 in adult and 1.55E-3 in children, in dry season of 2.57E-4 in adult and 9.88E-4 in children, against the standard set by the USEPA of 10-6 – 10-4. The surface water is not suitable for drinking as seen by the high water quality index of > 300. Lead possess carcinogenic risk for the inhabitants.

Źródło:

World News of Natural Sciences; 2021, 38; 20-36
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 78.

Tytuł:

Measuring Heavy Metals Content in Wastewater using Laser Induced Breakdown Spectroscopy

Autorzy:

Ali, S.
Jamil, H.
Imran, M.

Powiązania:

https://bibliotekanauki.pl/articles/412386.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

heavy metals
leather factories
wastewater
spectroscopy

Opis:

In the present study, laser-induced breakdown spectroscopy (LIBS) has been applied for the determination of chromium and cadmium contents in wastewater of different canneries surrounding by leather factories. The plasma was generated with a Q-switched Nd:YAG laser having a fundamental wavelength of 1064 nm and delivers maximum pulse energy of 180 mJ. Experimental conditions were optimized to improve the sensitivity and to get a reasonable signal from the generated plasma. The results show that the concentration of chromium and cadmium are varying in different samples depending on the incoming flow of the wastewater from factories. The results from LIBS and standard analytical technique called flame atomic absorption spectroscopy (FAAS) were compared and found in good agreement within the experimental uncertainties.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 2; 69-75
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 79.

Tytuł:

Assessment of the Acoustic Microclimate in the Zone of the Switch Unit in the Heavy Roller Conveyor Line – Case Study

Autorzy:

Sokolski, Marek

Powiązania:

https://bibliotekanauki.pl/articles/504594.pdf

Data publikacji:

2013

Wydawca:

Międzynarodowa Wyższa Szkoła Logistyki i Transportu

Tematy:

heavy-duty roller conveyors
noise hazards

Opis:

The sign of the so-called human engineering policy introduced in the industry is decreasing the occupational hazards and making the workplaces as comfortable as possible. That tendency finds expression in the tightened industrial safety-code. Among the annoying /damaging physical factors occurred in the workplace environment, the noise is of especially great importance. One of the most active noise sources in the warehouse systems are the conveyor lines for continuous transport of palletized load units. The measurement results of the main acoustic quantities in the zone of the heavy switch unit in the roller conveyor line are presented. The noise hazards, the speech intelligibility and the perception of the warning acoustic signal in this area are determined.

Źródło:

Logistics and Transport; 2013, 20, 4; 49-56
1734-2015

Pojawia się w:

Logistics and Transport

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 80.

Tytuł:

Simultaneous adsorption of heavy metals from water by novel lemon-peel based biomaterial

Autorzy:

Šabanović, Elma
Memić, Mustafa
Sulejmanović, Jasmina
Selović, Alisa

Powiązania:

https://bibliotekanauki.pl/articles/778437.pdf

Data publikacji:

2020

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

lemon peel
heavy metals
biosorption
FAAS

Opis:

Simultaneous adsorption of heavy metals in complex multi metal system is insuffnciently explored. This research gives results of key process parameters optimization for simultaneous removal of Cd(II), Co(II), Cr(III), Cu(II), Mn(II), Ni(II) and Pb(II) from aqueous solution (batch system). New lemon peel-based biomaterial was prepared and characterized by infrared spectroscopy with Fourier transformation (FTIR), scanning electron microscopy (SEM), electron dispersive spectroscopy (EDS), while the quantifi cation of metals was made by atomic absorption spectrometry (AAS). Simultaneous removal of seven metals ions was favorable at pH 5 with 300 mg/50 mL solidliquid phase ratio, within 60 min at room temperature with total obtained adsorption capacity of 46.77 mg g^–1. Kinetic modeling showed that pseudo-second order kinetic and Weber-Morris diffusion models best describe the adsorption mechanism of all seven heavy metals onto lemon peel.

Źródło:

Polish Journal of Chemical Technology; 2020, 22, 1; 46-53
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 81.

Tytuł:

Effect of Mining Activity in Accumulation of Heavy Metals in Soil and Plant (Urtica dioica L)

Autorzy:

Bislimi, Kemajl
Sahiti, Hazbije
Halili, Jeton
Bici, Mentor
Mazreku, Ilir

Powiązania:

https://bibliotekanauki.pl/articles/1839574.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

heavy metals
soil
translocation factor
bioaccumulation

Opis:

Contamination of soil and water by various heavy metals such as Cd, Pb, Ni, Cu, and Fe is increasing day by day as a result of different activities, such as industrialization and urbanization. Lead (Pb), Cadmium (Cd), and Nickel (Ni) are examples of potential heavy metals that are neither essential elements nor have any role in the process of cell metabolism, but are easily absorbed and accumulated in different parts of a plant and living beings. This study was to investigate the translocation and bioaccumulation of heavy metals such as Pb, Ni, Cd, Cu, and Fe in Urtica dionica L and soil samples from 2 sites (uncontaminated – Koliq and contaminated – Kishnica in the Republic of Kosovo). The results revealed that in the contaminated site, the mean level of all the metals in soil and different parts (root, stalk, and leaf) of the plant were found to be significantly (p < 0.01) higher than the uncontaminated site. Multivariate analysis was used to determine the distribution of metals within the study area. The trace metal contents from different parts of these plants were determined by the use of AAS. The results revealed that Urtica dionica L. translocated high amounts of metals to its organs, especially to leaves, so that translocation factors were much higher than one (> 1). However, these concentrations of heavy metals in the soil and Urtica dionica L were higher than levels specified according to the standards in UK and Germany.

Źródło:

Journal of Ecological Engineering; 2021, 22, 1; 1-7
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 82.

Tytuł:

Heavy Metal Contamination in Agricultural Soils: A Case Study in Mohammedia Benslimane Region (Morocco)

Autorzy:

Zaakour, Fatna
Kholaiq, Mariame
Khouchlaa, Aya
El Mjiri, Ikram
Rahimi, Abdelmejid
Saber, Najib

Powiązania:

https://bibliotekanauki.pl/articles/2086417.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

pollution
soil
wheat
heavy metals
vine

Opis:

This research aimed to determine the physicochemical characteristics and heavy metal concentrations of agricultural soils used for grape and wheat production in Morocco in the Mohammedia Benslimane area. The organic matter (OM) content ranged from 0.6% to 2.93%. The degree of total nitrogen was higher in the wheat plots than in the vine plots in the Mohammedia and Benslimane regions. Total nitrogen average rates ranged from 0.04 to 0.5% and from 0.07 to 0.8% in the vine and wheat plots. These results imply that the soil was silty clay and clay texture, neutral to slightly acidic at all stations. The P2O5 concentrations were 11.15 ppm and 68.14 ppm under the vine and the wheat plots, respectively, while the potassium concentration ranged from 33.1 to 287.9 ppm and from 26.9 to 184.75 ppm under the vine and the wheat plots, respectively. Furthermore, the concentrations of Cd at a few stations exceeded the standard value (2 ppm), reaching 10.375 ppm. The Pb and Zn concentrations were higher in vineyard plots than in wheat plots. The Pb and Zn concentrations were 20.22 ppm and 148.60 ppm, respectively. This study reports updated information on the states of eight stations in Mohammedia and Benslimane. However, further research is necessary to determine the pollution factors in local practice crops and naturally growing plants at these stations to assess their impact on livestock and humans.

Źródło:

Journal of Ecological Engineering; 2022, 23, 5; 1--15
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 83.

Tytuł:

The Impact of Sewage Treatment Plant on the Amount of Heavy Metals in Water of the Supraśl River Catchment Area

Autorzy:

Skorbiłowicz, M.
Skorbiłowicz, E.
Wójtowicz, P.
Ofman, P.
Zamojska, E.

Powiązania:

https://bibliotekanauki.pl/articles/123581.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

sewage treatment plant
heavy metals
water

Opis:

The main purpose of this study was to evaluate the effect of treated sewage flowing from sewage treatment plants located in the basin of the Supraśl river on the concentration and load of metals in river waters and its main tributaries. Three measuring- control points were chosen, on the river and its tributaries, located near Gródek, Sokółka and Dobrzyniewo. Selected points were located behind the discharge of treated wastewater from sewage treatment plants respectively – Gródek, Sokółka and Bialystok. The samples of treated sewage and water were collected in a period from May to November, once a month in 2014. Each individual sample was examined for the content of dissolved form of the following metals: Pb²⁺, Cu²⁺, Cd²⁺, Ni²⁺, Zn²⁺, Fe²⁺/³⁺. After taking into account water flow of the Biała, Sokołda and Supraśl in every month, metals loads expressed in mg·h^-1., transported by the Supraśl and its tributaries waters were calculated. In the study monthly metals loads discharged into the Biała, Sokołda and Supraśl by sewage treatment plants in Białystok, Sokółka and Gródek were also calculated. The studies have shown the impact of metals load in treated wastewater on metals loads in waters of studied rivers based on the obtained correlation. Most of the searched relations between loafs of Pb²⁺ – r = 0,88; Cd²⁺ – r = 0,98; Fe²⁺/³⁺ – r = 0,45; Ni²⁺ – r = 0,55; Zn²⁺ – r = 0,86 were obtained in case of wastewater treatment plant in Gródek and Supraśl waters. In the study period we observed a diversity in concentration of Cd²⁺, Fe²⁺/³⁺, Ni²⁺ and Zn²⁺ in treated sewage and in river waters, which affected loads of this metals.

Źródło:

Journal of Ecological Engineering; 2016, 17, 1; 136-142
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 84.

Tytuł:

Efficiency of leaching tests in the context of the influence of the fly ash on the environment

Autorzy:

Kalembkiewicz, J.
Sitarz-Palczak, E.

Powiązania:

https://bibliotekanauki.pl/articles/125254.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

heavy metals
fly ash
leaching test

Opis:

The leachability of heavy metals (Cu, Pb and Zn) from the coal fly ash samples was studied. The investigations executed using three leachability tests (USEPA, TCLP, ASTM). The effect of different parameters was determined (the diameter of ash grains, the kind of leaching solutions, pH of leaching solutions, the volume ratio of leaching solutions to the mass of ash samples, and the leaching time) on the leachability of the heavy metals from fly ash samples. Moreover, the influence of pH and changes in the redox potential of the leaching solutions as well as the presence of organic compounds that could potentially form complexes with metals and solubility changes of metals. The concentration of the metals studied (Cu, Pb and Zn) in all obtained solutions was determined by FAAS method. On the basis of the research investigations, optimal leachability conditions for Cu, Pb and Zn from fly ash in this study have been determined. We have also found that pH of the leaching solution, and the presence of organic compounds which have a potential capacity of complexion the metals are the important factors in determining the solubility of Cu, Pb and Zn.

Źródło:

Journal of Ecological Engineering; 2015, 16, 1; 67-80
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Distribution and Seasonal Variation of Heavy Metals in Sediments of Muthupet Lagoon, Southeast Coast of India

Autorzy:

Balakrishnan, T.
Sundaramanickam, A.
Shekhar, S.
Balasubramanian, T.

Powiązania:

https://bibliotekanauki.pl/articles/125289.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

seasonal variation
heavy metals
Muthupet lagoon

Opis:

This study deals with seasonal variation of heavy metals in sediments of Muthupet lagoon, Southeast coast of India from September 2011 to August 2012. The bulk sediments were association with sand, silt and clay. Geoaccumulation index (lgeo) was used to quantitatively assess the influences of heavy metal pollution. Heavy metals were determined by using Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES) and the results were compared to permissible limits of WHO/USEPA. The minimum concentration of heavy metals in all the stations were found during the post monsoon and summer seasons and the maximum concentration of heavy metals in all the stations were found during the premonsoon and monsoon seasons. The reason for the pollution was land drainage, irrigation through channels and municipal wastes and also the peak agricultural activities due to the release of fresh water from reservoirs. Among all the metals iron was found to be maximum in all the stations in postmonsoon and summer season followed by magnesium and manganese. Apart from these three metal, all other six metals are recorded in moderate range. The reason for the high concentration of these metals are anthropogenic activity, agriculture, aquaculture and the rivers regular in and out flow throughout the study duration in the lagoon area.

Źródło:

Journal of Ecological Engineering; 2015, 16, 3; 49-60
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

Trace Elements in Consumer Plants

Autorzy:

Wiater, Józefa
Wojciula, Ada

Powiązania:

https://bibliotekanauki.pl/articles/125474.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

heavy metals
vegetables
fruits
bioaccumulation
soils

Opis:

The aim of this study was to estimate the content of trace elements (Zn, Cu, Cr, Cd, Pb) in soils and consumer plants grown under and without the influence of traffic. The species such as lettuce, raspberry, beetroot, apple, carrot, chives and onion were selected for the study. The samples were mineralized and the heavy metal content in plants and soils was determined by means of atomic absorption spectrometry. The content of heavy metals in the soil from municipal allotments was higher than in the soil from the Saniki Colony. For both samples, the permissible soil content was not exceeded. The amount of trace elements in plants varied depending on species, but the place of vegetables and fruits origin was also important. Most of trace elements occurred in larger amounts in the plants from allotments, and in smaller amounts in the plants from Saniki Colony.

Źródło:

Journal of Ecological Engineering; 2019, 20, 10; 252-256
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

Heavy metal and mould contamination of herbal medicinal products – an overview

Autorzy:

Ałtyn, Iwona
Twarużek, Magdalena

Powiązania:

https://bibliotekanauki.pl/articles/2176838.pdf

Data publikacji:

2018-12-31

Wydawca:

Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie

Tematy:

contamination
heavy metals
medicinal plants
mould

Opis:

Rośliny zielarskie są powszechnie wykorzystywane jako surowce w przemyśle farmaceutycznym. Od czasów starożytnych ziół używa się w leczeniu i zapobieganiu chorób. Jednakże w dzisiejszych czasach mogą one nie spełniać wymagań dotyczących jakości, bezpieczeństwa i skuteczności. Większość produktów ziołowych nie jest testowana, a ich efekty działania są słabo monitorowane. Konsekwencją tego jest niewystarczająca wiedza na temat przebiegu ich działania, skutków ubocznych, przeciwwskazań oraz interakcji z występującymi na rynku produktami farmaceutycznymi oraz żywnością. Przyczyną negatywnego wpływu surowców ziołowych na organizm może być ich zanieczyszczenie przez różne grzyby pleśniowe, powstające podczas zbioru, przetwarzania, przechowywania, a także dystrybucji. Zanieczyszczenie surowców zielarskich może być również spowodowane przez różnorodne metale ciężkie, które występują w wielu aspektach współczesnego życia. Celem niniejszej pracy jest przegląd informacji na temat stanu mykologicznego i chemicznego roślin leczniczych, a także wskazanie kilku ważnych wyzwań związanych z efektywnym monitorowaniem ich bezpieczeństwa.

Źródło:

Annales Universitatis Paedagogicae Cracoviensis Studia Naturae; 2018, 3; 125-134
2543-8832
2545-0999

Pojawia się w:

Annales Universitatis Paedagogicae Cracoviensis Studia Naturae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Recreation Areas Optimisation and Nature Exploitation in Urban Ecosystems

Autorzy:

Bezuhla, Liudmyla
Bieloborodova, Mariia
Bondarenko, Liudmyla
Herasymenko, Tetiana

Powiązania:

https://bibliotekanauki.pl/articles/24496514.pdf

Data publikacji:

2023

Wydawca:

Uniwersytet Warszawski. Instytut Ameryk i Europy. Centrum Europejskich Studiów Regionalnych i Lokalnych (EUROREG)

Tematy:

nature exploitation
recreational areas
parks
heavy metals
pollution
accumulation of heavy metals
phytomass of deciduous fraction

Opis:

It has been substantiated that the increase in the concentration of heavy metals in the environment has especially aggravated in the conditions of military operations on the territory of Ukraine. The use of woody plants for the purposes of phytoremediation is one of the most effective options for optimising the state of the environment in urban ecosystems, regardless of the nature and source of contamination by metallic elements, which is of significant relevance in the conditions of post-war environmental restoration of Ukraine. The purpose of the study is to explore the peculiarities of some heavy metals accumulation by the assimilation apparatuses of the black locust (Robinia pseudoacacia L.) plants growing in the recreational areas of the city of Dnipro in order to further optimise tree plantings with the aim of improving the environment. The content of heavy metal elements (Cu, Zn, Pb, and Cd) in the biomass of the Robinia pseudoacacia L. leaves and in the soils of Dnipro recreation areas has been determined. The intensity of the accumulation of heavy metals in the phytomass of the Robinia pseudoacacia L. represents the following sequence Zn > Cu > Pb > Cd, which demonstrates a more intense absorption and accumulation in the phytomass of the leafy fraction of Zn and Cu in the phytomass of the deciduous fraction, and less significant of Pb and Cd. With the help of geo-information systems, cartographic material has been developed. It demonstrates the concentration gradient of Pb, Cu, Cd, and Zn in the assimilation organs of the black locust plants in the city of Dnipro recreational areas. Based on the cartographic analysis, it has been proved that the general condition of the soils in the recreation areas of Dnipro is characterised by significant disproportions in the level of pollution. The maps show the existing potential of the accumulative capacity of Robinia pseudoacacia L. to deposit Pb, Cu, Cd, and Zn, which allows for additional city functional zoning by considering phytoremediation functions of the existing and planned green spaces.

Źródło:

Studia Regionalne i Lokalne; 2023, 93, 3; 55-68
1509-4995

Pojawia się w:

Studia Regionalne i Lokalne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 89.

Tytuł:

Heavy metals in shells of freshwater molluscs from the Odra estuary

Autorzy:

Piotrowski, S.
Wiertlewska, A.

Powiązania:

https://bibliotekanauki.pl/articles/84300.pdf

Data publikacji:

1999

Wydawca:

Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich

Tematy:

heavy metal
shell
freshwater mollusc
mollusc
heavy metal concentration
habitat
Dreissena polymorpha
Viviparus viviparus
Odra estuary

Źródło:

Folia Malacologica; 1999, 07, 4
1506-7629

Pojawia się w:

Folia Malacologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 90.

Tytuł:

Equilibrium and kinetic studies on the removal of heavy metal ions with natural low-cost adsorbents

Autorzy:

Varank, G.
Demir, A.
Bilgili, M. S.
Top, S.
Sekman, E.
Yazici, S.
Erkan, H. S.

Powiązania:

https://bibliotekanauki.pl/articles/207257.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

adsorbents
adsorption
bentonite
dyes
heavy metals
kinetics
metal ions
water treatment
heavy metal removal
heavy metal ions
heavy metals ions removal
adsorbenty
adsorpcja
bentonit
barwniki
metale ciężkie
kinetyka
jony metali
usuwanie jonów metali ciężkich
uzdatnianie wody

Opis:

Adsorption isotherms and kinetics of the removal of heavy metal ions (Ni, Pb, Zn) from aqueous solutions by natural adsorbents (zeolite, bentonite, clay) were investigated in a lab-scale batch study. The effect of various parameters such as adsorbent dosage, initial concentration of heavy metal ions, temperature, and agitation time were studied to optimise the conditions. Under those optimized conditions (180 rpm agitation rate, 120 min agitation time, pH 4.0, 298 K, 100 mg/dm3 initial adsorbate concentration), the removal percentages of heavy metal ions for natural adsorbents have been determined. The adsorption mechanisms and characteristic parameters of the process were analyzed by two and three parameter isotherm models (Langmuir, Freundlich, Temkin, Redlich-Peterson, Toth and Sips), and kinetic models (Lagergren's pseudo-first order, Ho and McKay's pseudo-second order). Adsorption thermodynamics of heavy metal ions (changes of standard enthalpy, entropy and free energy) on zeolite, bentonite and clay were also studied at 298,318 and 338 K.

Źródło:

Environment Protection Engineering; 2014, 40, 3; 43-61
0324-8828

Pojawia się w:

Environment Protection Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 91.

Tytuł:

Heavy metals and phosphorus in snails of the River Liwiec and its tributaries

Autorzy:

Krolak, E.

Powiązania:

https://bibliotekanauki.pl/articles/83429.pdf

Data publikacji:

1999

Wydawca:

Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich

Tematy:

heavy metal
phosphorus
snail
Liwiec River
tributary
shell
Lymnaea stagnalis
Planorbarius corneus
phosphorus concentration
heavy metal concentration

Źródło:

Folia Malacologica; 1999, 07, 4
1506-7629

Pojawia się w:

Folia Malacologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

Effects of cadmium and lead concentrations and arbuscular mycorrhiza on growth, flowering and heavy metal accumulation in scarlet sage [Salvia splendens Sello 'Torreador']
Wplyw stezen kadmu i olowiu oraz mikoryzacji na wzrost, kwitnienie i akumulacje metali ciezkich w szalwii lsniacej [Salvia splendens Sello 'Torreador']

Autorzy:

Nowak, J

Powiązania:

https://bibliotekanauki.pl/articles/28604.pdf

Data publikacji:

2007

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

mycorrhization
heavy metal accumulation
plant growth
cadmium
heavy metal pollution
growth
Salvia splendens
scarlet sage
lead
flowering

Opis:

The objective of this research was to examine the influence of Cd (0, 10, 20, 40 mg Cd·dm⁻³) and Pb (0, 10, 100, 200 mg Pb·dm⁻³) in growing substrate and mycorrhizal colonization of root system on growth, flowering, Cd and Pb accumulation in scarlet sage shoots. Both Cd and Pb had a negative effect on mycorrhizal colonization of scarlet sage roots. The effect of Cd and Pb on the growth of scarlet sage was negligible. Cd at 40 mg·dm⁻³ lowered the number of inflorescences and caused slight chlorosis of the lowermost leaves. Pb at 200 mg·dm⁻³ caused drying of the lowermost leaves. Both heavy metals accelerated flowering of non-mycorrhizal plants, independently of the concentration in growing media. Cd and Pb contents in scarlet sage shoots increased with the increasing content of these heavy metals in growing substrate in both non-mycorrhizal and mycorrhizal plants. Mycorrhization decreased the growth of scarlet sage and increased the accumulation of Cd and Pb in shoots of plants grown in media strongly polluted with heavy metals.
Badania miały na celu określenie wpływu zawartości kadmu (0, 10, 20, 40 mg Cd·dm⁻³) i ołowiu (0, 10, 100, 200 mg Pb·dm⁻³) w podłożu oraz mikoryzy arbuskulamej na wzrost, kwitnienie i akumulację Cd i Pb w pędach szałwii lśniącej. Zarówno Cd jak i Pb wpływały ujemnie na kolonizację korzeni przez grzyby tworzące mikoryzę arbuskularną. Wpływ obu metali ciężkich na wzrost szałwii był niewielki. Cd w stężeniu 40 mg·dm⁻³ obniżał liczbę kwiatostanów i powodował lekką chlorozę liści dolnych, a Pb w stężeniu 200 mg·dm⁻³ zasychanie liści dolnych. Oba metale ciężkie przyspieszały kwitnienie roślin nie poddanych mikoryzacji, niezależnie od stężenia w podłożu. Zawartości Cd i Pb w pędach szałwii lśniącej wzrastały wraz ze wzrostem zawartości tych pierwiastków w podłożu, zarówno u roślin nie zmikoryzowanych jak i zmikoryzowanych. Mikoryzacja wpływała ujemnie na wzrost szałwii oraz zwiększała akumulację Cd i Pb w pędach roślin rosnących w podłożach silnie zanieczyszczonych tymi pierwiastkami.

Źródło:

Acta Agrobotanica; 2007, 60, 1
0065-0951
2300-357X

Pojawia się w:

Acta Agrobotanica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

Loads and Road Design for Intermodal Container Terminals with Untypical Heavy Load Traffic

Autorzy:

Majer, Stanisław
Budziński, Bartosz
Gardas, Przemysław

Powiązania:

https://bibliotekanauki.pl/articles/504355.pdf

Data publikacji:

2020

Wydawca:

Międzynarodowa Wyższa Szkoła Logistyki i Transportu

Tematy:

intermodal terminals
heavy load vehicles
road design

Opis:

There is a high demand in Poland for new intermodal container terminals. Increased rate of freight transport requires however new solutions for durable roads. Intermodal operations are carried out by swap bodies, trailers or most often containers. The intermodal terminals play the function of a storage, transportation and handling of the containers. The road surfaces within the terminals are exposed to different types of loads due to untypical types of transportation that operates on them. New types of roads demand new design methods that consider loads applied by special types of vehicles (container cranes, types of forklifts called reach-stackers). They also need to consider the method of container stacking, where the local forces can reach up to 1400 kN. The article presents typical loads that can be found in intermodal terminals, including the storing area and maneuvering aisles. The article presents also typical materials used for road construction, as well as method of dimensioning that incorporates different exposure factors. The method allows to design load-bearing and durable road surfaces. The calculations were performed for materials typically used in road construction, as well as in industrial flooring. The study presents a case study calculation of a parking lot designed for heavy load trucks.

Źródło:

Logistics and Transport; 2020, 45-46, 1-2; 103-110
1734-2015

Pojawia się w:

Logistics and Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 94.

Tytuł:

Urban soil contamination with lead and cadmium in the playgrounds located near busy streets in Cracow (South Poland)

Autorzy:

Aleksander-Kwaterczak, U.
Rajca, A.

Powiązania:

https://bibliotekanauki.pl/articles/184374.pdf

Data publikacji:

2015

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

urban soil
heavy metals
traffic pollutants
playgrounds

Opis:

The pollution of urban soil with heavy metals caused by traffic activity is increasingly becoming a great threat to human health and environmental quality. This paper presents results of research of lead (Pb) and cadmium (Cd) distribution in land on playgrounds situated near busy streets in Cracow (Poland). Samples of sand and soil were collected from the most top layer (0–10 cm). Concentrations of examined metals are: Pb from 6.80 to 54.04 mg/kg and Cd from 1.60 to 2.61 mg/kg, respectively. The highest concentrations were found in sampling points near the busiest roads, and are particularly visible in the case of lead concentration in soil samples. For sand samples, metal concentrations are much lower. Although the results have not determined a high degree of soil’s contamination, they indicate the problem of the children’s exposure to toxic metals. Urban soil should be monitored particularly in such special places as playgrounds.

Źródło:

Geology, Geophysics and Environment; 2015, 41, 1; 7-16
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 95.

Tytuł:

Identification of the Types of Measured Acoustic Modes Inside the Operator’s Cab in a Bulldozer

Autorzy:

Dziechciowski, Z.
Kozień, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/178012.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

heavy duty machine
acoustic modes
structural modes

Opis:

The aim of the study was to identify acoustic and structural modes in the spectrum obtained exper- imentally inside an operator’s cab in a bulldozer. Measurements were taken inside the operator’s cab in a caterpillar-track bulldozer Polremaco TD12NPH2E-2000, designed for work in underground mine enclosures. The acoustic pressure spectrum was obtained for varied rotational speeds of the engine during the free run of the machine. The reverberation time of the cab was determined basing on the pulse-type excited pressure response, followed by identification of the spectral components registered by measure- ments. Thus, identified frequencies were compared with natural acoustic frequencies registered inside the operator’s cab and with frequencies associated with the valves and ignition frequencies due to rotational speed and natural frequencies of structural vibrations of the cab’s walls. This study was conducted in an attempt to reduce the noise inside the operator’s cab using passive methods.

Źródło:

Archives of Acoustics; 2014, 39, 4; 653-663
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 96.

Tytuł:

Rapidity distributions of strange particles in Pb-Pb at 158 AGeV

Autorzy:

Bruno, G.

Powiązania:

https://bibliotekanauki.pl/articles/148576.pdf

Data publikacji:

2006

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

relativistic heavy-ion collisions
strangeness
rapidity distributions

Opis:

The production at central rapidity of KS0, Lambda, Teta and Omega particles in Pb-Pb collisions at 158 AGeV has been measured by the NA57 experiment over a centrality range corresponding to the most central 53% of the inelastic Pb-Pb cross section. We present the rapidity distribution of each particle in the central rapidity unit. The distributions are analysed based on hydrodynamical models of the collisions.

Źródło:

Nukleonika; 2006, 51,suppl.3; 11-15
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 97.

Tytuł:

Analiza zawartości metali ciężkich w nawarstwieniach historycznych Krakowa i ich rola wskaźnikowa w badaniach archeologicznych

Autorzy:

Wardas, M.

Powiązania:

https://bibliotekanauki.pl/articles/343905.pdf

Data publikacji:

2007

Wydawca:

nakł. Maciej Pawlikowski

Tematy:

Kraków
historia
metale ciężkie
history
heavy metals

Źródło:

Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2007, T. 3 spec. ed.; 1-6
1689-6742

Pojawia się w:

Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 98.

Tytuł:

Injection system assessment to optimize performance and emissions of a non - road heavy duty diesel engine : experiments and CFD modelling

Autorzy:

Auriemma, M.
Iannuzzi, S.

Powiązania:

https://bibliotekanauki.pl/articles/246478.pdf

Data publikacji:

2012

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

diesel combustion
heavy duty engines
STAR-CD

Opis:

The advancing emissions requirements and the customer demand for increased performance and fuel efficiency are forcing the diesel engine technology to keep improving. In particular, the large diesel engines are undergoing to a significant restriction in emission standards. Reaching the new limits requires innovative solutions, improved calibration and controls of the engine combustion technology, as well as the optimization of the injection system that has experienced the most fundamental development over the last decade. The objective of the paper is to present preliminary results of an investigation for the development of an efficient combustion system for marine diesel engines. The effect of different engine parameters on performance and engine out emissions were evaluated. Specifically, different nozzle geometries, injection pressure, injection timings were taken into account. The investigation was carried out both experimentally and numerically. Three different nozzles geometries for three different values of the start of injection were tested. The in-cylinder pressure, rate of heat release, NOx and soot were evaluated for a high load engine condition. The experimental activity was carried out on a large displacement single cylinder direct injection diesel engine equipped with a high-pressure common rail injection system able to manage multiple injections. The engine test bench was equipped with an external air supercharger able to set high air boost levels. The system controls the intake air temperature by means of a heater exchanger. The numerical investigation was carried out using the commercial CFD STAR-CD code in a three-dimensional domain including the cylinder head and piston bowl. Combustion behaviour was simulated using the 3 Zones Extended Coherent Flame Model (ECFM3Z).

Źródło:

Journal of KONES; 2012, 19, 3; 19-30
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 99.

Tytuł:

Environmental Long Term Impact on a Romanian Military Testing Range

Autorzy:

Petre, R.
Rotariu, T.
Zecheru, T.
Petrea, N.
Băjenaru, S.

Powiązania:

https://bibliotekanauki.pl/articles/358798.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

contamination
analytical methods
heavy metals
energetic materials

Opis:

Military range management has become extremely important in recent years, in order to comply with the limitations imposed by national and international environmental regulations. In this regard, soil, vegetation and ground water samples from a testing facility belonging to the Romanian Ministry of National Defense were analyzed for contamination with metals and energetic materials. The tests confirmed the presence of contaminants as energetic materials and heavy metals (Pb, Cu, Zn), with a heterogeneous distribution on the range and concentrated in the impact and firing line areas.

Źródło:

Central European Journal of Energetic Materials; 2016, 13, 1; 3-19
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 100.

Tytuł:

Determination of metals in sea water of the Baltic Sea in Międzyzdroje

Autorzy:

Daniszewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/412273.pdf

Data publikacji:

2013

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

toxic heavy metals
sea water
Baltic Sea

Opis:

The present research work deals with the quantification of toxic heavy metals in the water samples collected from sea water in Międzyzdroje. While the annual average concentration of Cadmium was calculated as 0.44 ppm in 2008 of the year and 0.46 ppm in 2009 of the year. The values obtained were found to be below the permissible limit of 2.0 ppm set for inland surface water. While the annual average concentration of Chromium was calculated as 2.67 ppm in 2008 of the year and 2.64 ppm in 2009 of the year. Which was very much above the permissible limit of 0.1 ppm set for inland surface water. The observed annual average concentration of Copper in the water was 0.08 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which was below the permissible limit of 3.0 ppm set for inland surface water. While the annual average concentration of Mercury was calculated as 0.05 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which was very much above the maximum limit of 0.01 ppm set for inland surface water. The annual average concentration of Nickel in the water samples was observed to be 2.47 ppm in 2008 of the year and 2.70 ppm in 2009 of the year, which is close to the limit of 3.0 ppm set for inland surface water. The annual average concentration of Lead in the water samples was observed to be 0.06 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which is above the permissible limit of 0.1 ppm set for inland surface water. The results of the present investigation indicate that the annual average concentration of Zinc in water samples was 3.45 ppm in 2008 of the year and 3.73 ppm in 2009 of the year, which is above the permissible limit of 5.0 ppm set for inland surface water.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2013, 13; 13-22
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

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