Temat: Heavy-metal - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

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

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Skocz do pozycji: 3.

Tytuł:: Phytoremediation as a Barrier to Heavy Metal Distribution in Open Dumping Landfill in Peatlands
Autorzy:: Marsum
Anwar, Taufik
Slamet
Khayan
Wardoyo, Slamet
Powiązania:: https://bibliotekanauki.pl/articles/2105277.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: phytoremediation
barrier
heavy metal
open dumping landfill
Opis:: Landfills with the open dumping method cause many environmental pollution problems, such as pollution, soil, surface water, and groundwater. Pollution cleaning technology (remediation) to reduce the harmful effects in the locations contaminated with heavy metals can be implemented by means of several methods, including using phytoremediation as a barrier to heavy metal contamination in order to preventing contamination distribution to the environment. Ferns (phytoremediation) on the side of the open dumping landfill were investigated as phytoremediation, inhibiting the distribution of heavy metals into the environment. The descriptive-analytic research method was used to analyze the ability of ferns in an open dumping landfill in peatland areas as a barrier to metal contamination distributed to the environment. The results show that ferns can bind heavy metals, such as Hg and Pb, produced from open dumping landfill activities to prevent the distribution of heavy metals to the environment around the landfill. Ferns are able to block the distribution of heavy metals into the environment, especially Pb and Hg. The ability of ferns to become potential plants in peatland areas requires further testing of other heavy metals.
Źródło:: Journal of Ecological Engineering; 2022, 23, 6; 112--117
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Phytoremediation of Copper and Zinc Contaminated Soil around Textile Industries using Bryophyllum pinnatum Plant
Autorzy:: Riza, Mumtahina
Hoque, Sirajul
Powiązania:: https://bibliotekanauki.pl/articles/1839592.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: contaminated soil
heavy metal
phytoremediation
Bryophyllum pinnatum
Opis:: Phytoremediation is an acceptable, economical, and eco-friendly way to remediate the metal contaminated soils beside the industrial zone. Like other industries, the textile industries generate the effluent containing several types of pollutants such as metal conjugated dyes, several inorganic and organic substances, etc. When discharged to the environment, metals - specifically heavy metals - exert an adverse impact on soil and other biotas through the food chain. In this study, Bryophyllum pinnatum was used for phytoremediation in the contaminated soil sample collected from the area located around textile industries in Kaliakair, Bangladesh. The experiment was carried out by ex-situ in earthen pots. The concentration of six heavy metals including Zn, Cu, Ni, Cr, Pb, and Cd was analyzed before applying phytoremediation. Two heavy metals, Cu (28.57 µg/g) and Zn (143.88 µg/g) were found and others were not detected in that soil. After planting of Bryophyllum pinnatum, the concentrations of Cu and Zn in the contaminated soil were analyzed at three intervals of 45 days (S3), 90 days (S4), and 135 days (S5) in three replications. The experiment revealed that there was a decline in the concentration of Cu in soil (27.08 µg/g for 45 days and 13.19 µg/g for 90 days) except for the 3rd replication of 135 days (S5). However, the concentration of Zn (mean 103.09 µg/g) in soil was measured at 45 days and then remained within nearer values of concentration for other replications. The amounts of heavy metals uptake for both Cu and Zn by plants can be presented as leaves> stem >root which indicated that heavy metals were transferred from root to shoot over time. Bryophyllum pinnatum can, therefore, be considered as a good hyperaccumulator plant having BCF>1 and TF>1 values as well as possessing a better capacity of phytoextraction of metals.
Źródło:: Journal of Ecological Engineering; 2021, 22, 4; 88-97
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Accumulation of Heavy Metals in Organs of Aqueous Plants and its Association With Bottom Sediments in Bug River (Poland)
Autorzy:: Skorbiłowicz, E.
Skorbiłowicz, M.
Malinowska, D.
Powiązania:: https://bibliotekanauki.pl/articles/124487.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: heavy metal
bottom sediments
aquatic plant
river
Opis:: The article presents the results of studies upon metals (Pb, Zn, Cr, Ni, Cu, Co) in bottom sediments and in various parts of the aquatic plants taken from the Bug river (Poland). The metal contents in the examined environmental elements were determined by AAS technique. The aim of this study was to evaluate the content of metals in bottom sediments and macrophytes (root, stem, leaf) occurring in the Bug river. It was hypothesized that the heavy metal content in plant tissues reflects the amount of metals in sediments. It has been shown that the average metal distribution in the examined plants present in the Bug river and bottom sediments was as follows: Pb, Zn, Co, and Cu sediments>root>leaf>stem, while in the case of Ni and Cr, the contents were greater in roots than in sediment (root>sediment>leaf>stem), although the differences in contents were not large. The study showed that most metals are present in roots and only a small part of them is transported to the stem and leaves. The size of the metal movement within plants may depend on their contents. It was found that for Ni, Cr and Cu in 2014, the bioaccumulation factor was above one, which confirms the high efficiency of metals uptake from the environment as evidenced by statistical analysis. Bioaccumulation factor (BF) was smaller than one for Pb, Co and Zn, confirming the high ability to retain metals in the root. Aquatic plants are an effective barrier for the surface water by accumulating heavy metals in their biomass. Macrophytes are proposed to monitor the river pollution.
Źródło:: Journal of Ecological Engineering; 2016, 17, 4; 295-303
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Increasing Effectiveness of Heavy Metal Sorption by Biosorbent Microalgae Beads
Autorzy:: Rinanti, Astri
Fachrul, Melati Ferianita
Hadisoebroto, Rositayanti
Minarti, Astari
Sunaryo, Thalia
Powiązania:: https://bibliotekanauki.pl/articles/2173268.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: bead
sorbent
biosorption
functional group
heavy metal
Opis:: This research was conducted to overcome the Cu2+ heavy metal pollution in the environment through a biotechnological approach with heavy metal sorption process by microalgae beads. Biosorbent in form of beads was produced from Chlorella sorokiniana, Monoraphidium sp., and Scenedesmus obliquus tropical microalgae mobilized with Naalginate polymer. The sorption process is observed on a controlled batch culture with variations of temperature (25, 35, and 45 °C), and observation periods (200th, 220th, 250th, 270th min) as contact time. The absorption efficiency on each temperature variation reaches more than 90%, but the highest absorption efficiency rate is at 92.20% on 35 °C temperature and 200 minutes of contact time. Biosorbent beads with 2–3 mm of diameters show the best sorption ability than the 3–4 mm and 4–5 mm ones. Sorption process is also evident with the existence of intensity alteration on amide, ketone, and sulfhydryl function groups which were consistently weakened until the end of the sorption process. The beads utilized in this research are potentially reusable as biosorbent. Thus, further examination is required to acknowledge the maximum reutilization rate of the beads as biosorbent on heavy metal absorption process.
Źródło:: Journal of Ecological Engineering; 2022, 23, 7; 50--57
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Treatment of Laboratory Wastewater by Using Fenton Reagent and Combination of Coagulation-Adsorption as Pretreatment
Autorzy:: Arita, Susila
Agustina, Tuty Emilia
Ilmi, Nurul
Pranajaya, Violanda Dwi Wulandari
Gayatri, Rianyza
Powiązania:: https://bibliotekanauki.pl/articles/2173343.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: laboratory wastewater
fenton reagent
coagulation
adsorption
heavy metal
Opis:: Laboratory wastewater contains organic and inorganic compounds that are harmful to the environment when disposed of without prior treatment. Besides the high COD and BOD values, the laboratory wastewater also contains metals such as iron (Fe), zinc (Zn), copper (Cu), chromium (Cr), and lead (Pb) which is categorized as dangerous waste material and can pollute the groundwater. Although the quantity of wastewater produced by the laboratory is relatively small, it has a real impact on the environment around the laboratory. However, the wastewater has to be treated properly before being discharged into the environment. The aim of the research was to study the laboratory wastewater treatment by using Fenton’s reagent with coagulation and adsorption pretreatment. In the pretreatment with coagulation, three types of coagulants are used, namely PAC (Poly Aluminum Chloride), ACH (Aluminum Chlorohydrate) and Aluminum Sulfate (AS) with their respective concentrations of 10–80 ppm. The highest percentage of average pollutant removal of 58.21% was found when 80 ppm of AS was applied. The pretreatment was continued by adsorption with activated carbon and zeolite adsorbents within 60–120 minutes of mixing time. It was detected that the most optimum adsorbent was activated carbon with average pollutant removal of 50.22% within 1 hour of mixing time. Processing was extended by utilized Fenton’s reagent using a variation of the molar ratio between 1:100 and 1:400. It was obtained that the best molar ratio to degrade the laboratory wastewater is 1:300 with an average removal of pollutant of 43.45%. As a result of laboratory wastewater treatment using combine Fenton’s reagent and coagulation-adsorption pretreatment, an average pollutant removal of 90.81% was obtained. The final content of COD, BOD, TSS, as well as Cu and Pb metal has met the environmental quality standard.
Źródło:: Journal of Ecological Engineering; 2022, 23, 8; 211--221
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Wastewater Treatment Using Activated Carbon Produced from Oil Shale
Autorzy:: Hamdan, Mohmmad Ahmad
Sublaban, Esraa Taha
Al-Asfar, Jamil Jawdat
Banisaid, Mai Abdullah
Powiązania:: https://bibliotekanauki.pl/articles/2202355.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: activated carbon
wastewater treatment
removing
heavy metal
water
Opis:: In recent years, many researchers have expressed interest in wastewater treatment using activated carbon produced from cheap raw materials. In this work, an activated carbo-aluminosilicate (ACS) – supported zero-valent iron (ZVI) composite was produced from Um AL-Rasa oil shale mine and examined to eliminate Chromium (VI) from contaminated water. Activation of raw oil shale fine particles (< 212 μm) was chemically performed using 95 and 5% wt of H2SO4 and HNO3, respectively, as activating agents. The activated material was further treated with caustic soda, named ACS, and modified with fine zero-valent iron particles < 212 μm), called ZVI/ACS composite. Kaolin was added to the composite with the ratio: (50 % wt. light kaolin: 50 % wt. ACS), named as ZVI/ACS/K. The XRD analysis for both composites confirmed iron dispersion at 45°. Adsorption experiments were carried out using the two adsorbents ZVI/ACS & ZVI/ACS/K under different values of pH, and adsorbent dosage. The results indicated that the reduction of Chromium was maximum under the 3 pH value and 2.0 gm amount of ZVI/ACS/K. Furthermore, it was found the removal rate was enhanced by 17% and 24.7% when ZVI/ACS & ZVI/ACS/K adsorbents were used, respectively, compared to that when only ACS adsorbent was used alone. Finally, the dependency of Chromium removal on its initial concentration by ZVI/ACS/K adsorbent was also investigated at two different temperatures of 27° and 50°. The results indicated a decrease in the removal rate of the Chromium as the concentration increased at 27°; however, the removal rate previously enhanced at 50° at all initial concentrations.
Źródło:: Journal of Ecological Engineering; 2023, 24, 2; 131--139
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Heavy Metals Chelating Ability and Antioxidant Activity of Phragmites australis Stems Extracts
Autorzy:: Sellal, Abdelhakim
Belattar, Rima
Bouzidi, Abdelouahab
Powiązania:: https://bibliotekanauki.pl/articles/124953.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: chelation
Phragmites australis
common reed
DPPH
heavy metal
Opis:: In this study, the ability of hexane (HSE), chloroform (CSE), ethyl acetate (EASE) and methanolic (MSE) stems extracts from Phragmites australis or EDTA (as standard) to chelate iron using ferrozine method or zinc and copper using the murexide method is carried out in vitro. When the increased volumes of the HSE studied were taken from a stock solution of a fixed concentration 1 mg/ml at 25–175 μl for the iron and zinc chelating assay, 1–7 mg/ml for the copper chelating assay gave a significant (p≤ 0.01) activity. The obtained results showed that the HSE have the highest capacity to chelate ferrous ions below the EDTA (standard chelator) with absorbance arrive to the lesser extent 0.24±0.005, 0.04±0.013 which expresses 86% and 97% (compared to the control) of inhibition, respectively. For the murexide chelation, the results obtained also showed that the HSE and EDTA have a good (p≤ 0.01) chelating dose dependent effect towards zinc and copper ions with increased absorbance 0.45±0.02 and 0.42±0.02 with 54% and 56% of inhibition, respectively, for the zinc chelation and 0.66±0.03, 0.13±0.005 represent 44% and 88% for copper chelation. In contrast to the antioxidant capacity, the extract of hexane, ethyl acetate, chloroform and methanol from leaves, stems and roots of the Phragmites australis plant have a very low scavenger effect to the radical DPPH where the maximum inhibition is approximately 13.79%, obtained with the maximum volume. Finally, the HPLC analysis of effective extract (HSE) confirmed the presence of oxalic, citric, malic, succinic, fumaric, formic, acetic, propionic and butyric or iso butyric acid.
Źródło:: Journal of Ecological Engineering; 2019, 20, 2; 116-123
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Content of zinc, lead and cadmium in selected agricultural soils in the area of the Śląskie and Ciężkowickie foothills
Autorzy:: Józefowska, A.
Miechówka, A.
Gąsiorek, M.
Zadrożny, P.
Powiązania:: https://bibliotekanauki.pl/articles/125031.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Silesian and Ciężkowickie Foothills
heavy metal
land use
Opis:: The purpose of this study was to evaluate the state of contamination with zinc, lead, and cadmium in selected soils of the Śląskie and Ciężkowickie Foothills and to determine the impact of the type of agricultural use and selected physico-chemical properties of soils on heavy metal content. The test soils were characterized by natural content of zinc, lead, and cadmium in most cases. Only one type of soil located on Śląskie Foothills developed increased levels of Cd (1.1 mg kg-1). The content of zinc, lead, and cadmium in the surface layer (0–30 cm) was higher in the soils of Śląskie Foothills than in soils of Ciężkowickie Foothills. The bedrocks from which the soils of these two mesoregions are formed differed significantly only in the content of zinc (it was higher in the soils of Śląskie Foothills). The content of Zn, Pb, and Cd in the surface layer of soil depends on its texture and organic carbon and total nitrogen content. There was also a positive correlation between the content of Pb and Cd and hydrolytic acidity and between the content of Zn and Ca and CEC. Different types of land uses did not influence the content of the metals.
Źródło:: Journal of Ecological Engineering; 2014, 15, 1; 74-80
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Thermal Recycling of Bentonite Waste as a Novel and a Low-Cost Adsorbent for Heavy Metals Removal
Autorzy:: Shubber, Mukhtar D. H.
Kebria, Daryoush Yousefi
Powiązania:: https://bibliotekanauki.pl/articles/24201677.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: bentonite
heavy metal
isotherm
thermal remediation
hazardous waste
Opis:: The objectives of this study are the thermal remediation of bentonite waste to convert non-hazardous material, and the use of the obtainedthermal recycling bentonite waste (TRBW) as a novel low-cost adsorbent for the removal of heavy metals from aqueous solution using the batch system. The origin of bentonite waste is a by-product from plants of spent engine oil recycling [PSEOR]. It was remediated in two stages, directly burning and in the electrical furnace at 700 °C for 100 minutes to eliminate oil residues and impurities. The tests of XRD, BET, FTIR, EDX, and SEM were accomplished to identify the chemical and physical characteristics of TRBW. After then, the examination of the ability of TRBW to adsorption of the fiveheavy metals (Zn, Ni, Cd, Cr, and Pb) with different experimental parameters such as initial concentration, adsorbent dose, temperature, pH, and contact time. Different models of isotherm, kinetic, and thermodynamic were utilized andthe results indicate that the nature of heavy metals adsorption onto TRBW was homogeneous. According to the maximum adsorption capacities, the metals ranked as Pb> Cd> Zn> Cr> Ni, and adsorption capacities were 94.97, 73.85, 39.56, 38.34, and 36.33 mg/g, respectively.
Źródło:: Journal of Ecological Engineering; 2023, 24, 5; 288--305
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Evaluation of Pesticide and Heavy Metal Contamination on Soil Properties and Microbiota in Thailand’s Mountainous Region
Autorzy:: Kroeksakul, Patarapong
Ngamniyom, Arin
Silprasit, Kun
Sutthisaksopon, Phanom
Sriyapai, Thayat
Phowan, Naphat
Singhaboot, Pakjirat
Powiązania:: https://bibliotekanauki.pl/articles/27323810.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: mountainous region
heavy metal
pesticides
microbiota
soil properties
Opis:: The article aims to investigate the state of soil elements in upland agriculture and the state of pesticide contamination in the environment of differing highland agricultural areas in Thailand. The number of heavy metals present was Fe > Mn > Zn > Pb > Ni > Cu > Cd, dominant pesticide contamination in the carbamate group is methomyl (0.11 mg/kg), and the organochlorine group is triazophos (0.02 mg/kg). Pesticide contamination was found to positively and significantly correlate with the soil’s total N and Fe content (p < 0.01). In the soil microbes, the dominant genera of Aquabacterium were found at the highland agriculture site H1, Massilia at H2, and Sphingomonas at H3.
Źródło:: Journal of Ecological Engineering; 2023, 24, 7; 331--344
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: The Impact Evaluation of Zeolitization Parameters on the Properties of Sewage Sludge Ash
Autorzy:: Latosińska, Jolanta
Powiązania:: https://bibliotekanauki.pl/articles/124836.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: sewage sludge ash
synthetic zeolites
heavy metal
CEC
Opis:: The incineration of municipal sewage sludge causes the formation of ash, which needs further utilization. The literature gives only few examples of the chemical sewage sludge ash conversion with the hydrothermal method. The effect of conversion depends on the properties of the raw material and the process parameters. According to the domestic and foreign test results of the conversion of fly ash from coal, the fusion method is more effective. The aim of the paper was to evaluate the impact of chemical sewage sludge ash conversion with the fusion method on the chosen properties of the obtained material. The applied conversion parameters were the ratio of sewage sludge ash:NaOH, the concentration of NaOH, the activation time and temperature as well as the crystallization temperature and time. In some of the samples, the introduction of the fusion caused the formation of the following, e.g. (hydroxy)sodalite, zeolite X and zeolite Y, zeolite P, (hydroxy)cancrinite. The temperature of the thermal treatment of sludge, the ratio of ash:NaOH and the crystallization time were the parameters having a statistically significant impact on the effect of zeolitization and the properties of the obtained material, but the changes of their values had little effect on the tested features of the modified ash. On the basis of the leaching of Cd, Cr and Ni from the samples after the conversion it was proven that a higher temperature of the thermal treatment of sewage sludge was favourable for the formation of permanent structures.
Źródło:: Journal of Ecological Engineering; 2019, 20, 10; 195-205
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Histological Damage at Gonad of Faunus ater (Gastropod Mollusk) Obtained from Heavy Metal Contaminated River
Autorzy:: Agustina, Rahmi
Sarong, M. Ali
Yulianda, Fredinan
Suhendrayatna, -
Dewi, Ervina
Powiązania:: https://bibliotekanauki.pl/articles/952451.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Bale River
Reuleng River
heavy metal
Faunus ater
gonads
Opis:: The cause of the histological damage of Faunus ater (gastropod mollusk) gonad has been identified in the samples from two rivers, namely Bale River and Reuleng River which flow through residential, agricultural and industrial areas. The heavy metal concentration within the tissue of Faunus ater was analyzed with Atomic Absorption Spectrophotometer (Shimadzu AA 630). Meanwhile, the histological damage on gonads was observed microscopically. Afterwards, the damage levels obtained from the two respective rivers were compared and analyzed with t-test. The results confirm the histological damage that occurred in the gonads of Faunus ater collected from the two rivers. The gonadal damage of female Faunus ater from both rivers was found not to be significantly different, observed by the number of developed and damaged oocytes. It was also found that the gonads of male Faunus ater collected from Bale Riverl, have higher quantity of spermatogenic cells, in which they experience greater necrosis than the ones from Reuleng River.
Źródło:: Journal of Ecological Engineering; 2019, 20, 8; 114-119
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Removal of Cobalt ions from Wastewater by Batch and flowing Forward Osmosis Processes
Autorzy:: Hussein, Tamara Kawther
Powiązania:: https://bibliotekanauki.pl/articles/124436.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: heavy metal
wastewater
potassium chloride
forward osmosis
membrane separation
Opis:: This study was focused on forward osmosis batch and forward osmosis flowing processes to remove heavy metal (Co⁺² ions) from wastewater. Cellulose triacetate (CTA) membrane was used as flat sheet for forward osmosis process. Potassium chloride KCl with different concentrations was used as draw solutions. The experimental work was divided into two parts. Forward osmosis flowing process as first part, was discussed under different operating parameters studied, such as the concentration of draw solutions 10–20 g/l, concentration of feed solutions 15–150 mg/l, temperature of feed and draw solutions 20–50 ºC, pH of feed solution from 2 to 10, feed and draw flow rate were maintained at 50 l/h, and pressure was maintained at 0.25 bar gauge. Forward osmosis batch process as second part, was discussed under different operating parameters, such as the concentration of draw solutions 10–120 g/l, concentration of feed solutions 15–150 mg/l, temperature of feed and draw solutions 20–50 ºC, and pH of feed solution from 2 to 10. The results showed that the water flux increased along with the draw solution concentration, and temperature of feed and draw solutions and decreased with the increasing operating time of experiment, concentration and pH of feed solution. The value of rejection efficiency after 4hrs reached 81.19% for the FO flowing process and 73.19% for the FO batch process.
Źródło:: Journal of Ecological Engineering; 2019, 20, 4; 121-126
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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