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Tytuł:
The Relationship among Dissolved Inorganic Phosphate, Particulate Inorganic Phosphate, and Chlorophyll-a in Different Seasons in the Coastal Seas of Semarang and Jepara
Autorzy:
Maslukah, Lilik
Zainuri, Muhammad
Wirasatriya, Anindya
Maisyarah, Siti
Powiązania:
https://bibliotekanauki.pl/articles/125252.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
dissolved inorganic phosphate
particulate inorganic phosphate
Semarang
Jepara
Opis:
The speciation of particulate inorganic phosphate (PIP) in waters is still rarely studied, unlike the dissolved inorganic phosphate (DIP) which is often used in the assessment of the water quality parameters and their effect on the presence of chlorophyll a. This research aimed at determinig the relationship between DIP and PIP and its effect on the concentration of chlorophyll-a. This research was conducted in the waters of Semarang and Jepara, in different seasons (Rainy and dry). Speciation from PIP was obtained through an extraction process using 1 M HCL and continued with phosphate analysis using the molybdenum blue method, as in the DIP analysis. The linear model was used to find an equation and determine the variables that affect chlorophyll a. Our results showed that the distribution patterns of DIP, PIP and Chlorophyll-a have different patterns in the two study areas and different seasons. The concentration of DIP is always high in the Semarang waters, and is followed by a high chlorophyll-a response. A different pattern was found in the Jepara waters, where the chlorophyll-a response is high in the east monsoon. The relationship of Chl-a to DIP was very significant in the west season in the waters of Semarang and the Jepara region in the east season (p < 0.05). The relationship of chlorophyll a to DIP in the Semarang and Jepara waters produced an equation, Chl a = -56.565 + 76.672 (DIP) with a coefficient of determination R2 = 0.478, at a significant level (p) = 0.004 and Chl a = -25.844 + 68.827 (DIP) with value of R2 = 0.421 at a significance level of p = 0.007, respectively.
Źródło:
Journal of Ecological Engineering; 2020, 21, 3; 135-142
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of Nitrogen Transformations in the Soil Fertilized with Digestate from Agricultural Biogas Plant
Autorzy:
Wysocka-Czubaszek, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/125017.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
digestate
inorganic nitrogen
nitrification
Opis:
The biogas production from dedicated crops creates an additional organic fertilizer which may, at least partially, substitute synthetic-N fertilizers. The digestates are characterized by an elevated NH4-N content; therefore, they may supply more readily-available N to the crops, compared to manures. Thus, the aim of the study was the analysis of N dynamics in the soil fertilized with the digestate from agricultural biogas plant fed mainly with maize silage with addition of poultry manure and potato pulp. A laboratory incubation experiment was conducted for 56 days and the soil was sampled from the field fertilized with the same digestate under the conditions of regular farming practices. In both the incubation experiment and the field study, the digestate supplied the soil in NH4-N. The inorganic-N transformation showed a similar overall pattern with some differences. In the incubation experiment, after the application of the digestate in the amount corresponding to the fertilizer dose of 170 kg N ha-1, the NH4-N content decreased rapidly during the first 14 days from 61.54±5.65 mg N kg-1 to 19.02±4.12 mg N kg-1 and then at the day 42 – to values close to zero. In contrast, the NO3-N content increased from 6.35±0.35 mg N kg-1 to 50.65±4.73 mg N kg-1 at day 14 and further to 79.06±13.95 mg N kg-1 at day 42. In the field, the elevation of the NH4-N content after digestate application was less pronounced as a consequence of lower application rate (114 kg N ha-1); however, the rapid drop in the ammonium-N content from 20.41±9.18 mg N kg-1 at day 0 to 14.80±9.75 mg N kg-1 at day 7 followed by a slow decrease until the day 56, was observed. The average soil NO3-N content was rather constant in the first 7 days after fertilization and the rapid nitrification occurred in next 49 days resulting in the nitrate-N increase to 32.97±24.46 mg N kg-1. The overall pattern of N dynamics in the soil fertilized with digestate was the same in the incubation experiment and under the field condition, even though the studied soils showed some dissimilarities. Rapid ammonium-N transformation to nitrate-N may create favourable conditions for nitrate leaching; therefore, the farm management techniques should be focused on nutrient recycling and N loss prevention.
Źródło:
Journal of Ecological Engineering; 2019, 20, 1; 108-117
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advances in hybridised and inorganic composite metal halide perovskites : a review
Autorzy:
Farfan, Hariana I.
Roa, Karol L.
Castro, Hugo F.
Powiązania:
https://bibliotekanauki.pl/articles/27315695.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
perovskites
halides
hybrid
inorganic
composites
Opis:
In recent years, metal halide perovskites have gained significant attention due to their unique optical and electronic properties of semiconductor materials, which make them ideal for use in sustainable and energy-efficient devices. These devices include solar cells, lasers, and light-emitting diodes. Therefore, this review aims initially to provide an overview of the most important characteristics of metal halide perovskites, including their engineering development in various types, such as those based on lead or lead-free materials, like tin or germanium. Additionally, perovskites made from purely inorganic compounds like caesium bromide, chloride, or iodide, as well as hybrids mixed with organic compounds like formamidinium and methylammonium halides will be discussed. The goal is to improve their stability and efficiency. Secondly, some of the studies have proposed technologies combining electronic and mechanical characteristics of flexibility or rigidity as required, promoting their synthesis with different materials such as polymers (poly methyl methacrylate, polyvinylidene fluoride), biopolymers (starch, cyclodextrin, polylactic acid, and polylysines), among others. Finally, the subject of this work is to establish the main purpose of the research carried out so far, which is to develop simpler and more scalable processes at industrial level to achieve greater efficiency and duration in storage, exposure to visible light, critical environments, humid or high temperatures.
Źródło:
Opto-Electronics Review; 2023, 31, 4; art. no. e148221
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Na-montmorillonite modified with ammonium salts and azobenzene as a photoactive nanomaterial
Autorzy:
Koteja, A.
Matusik, J.
Powiązania:
https://bibliotekanauki.pl/articles/184535.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
inorganic solid structures
organic molecules
minerals
Opis:
Modification of inorganic solid structures (e.g. minerals) with organic molecules is a constantly developed topic in material sciences. The organic functionalization leads to the production of new materials with integrated properties of both the organic and inorganic component. In the presented study we have modified a Na-montmorillonite with alkylammonium surfactants and subsequently azobenzene, in order to obtain a nanomaterial that shows response to UV radiation. Azobenzene is a photoswitchable organic molecule capable to change its conformation upon UV radiation from the trans- to cis-azobenzene isomer. This reaction is coupled with a change of the molecules shape and dimensions (Klajn 2010). The montmorillonite is a layered aluminosilicate that serves as an excellent host structure for organic guest species. Due to the net negative layer charge it shows the ability to swell and to exchange the originally present interlayer cations. These properties allow the intercalation of bulk organic molecules and to control their arrangement. Much attention has been paid to the possibility of transferring the photoswitching ability of organic molecule into the motion of the whole organo-mineral structure (Heinz et al. 2008). Such nanoswitch is particularly appealing as it is controlled with radiation – remotely and at a precise location. The efficiency of a synthesized nanoswitch depends on an accurate selection of the host and guest component. The target of this study to test a series of organic surfactants and to establish a modification pathway that leads to obtaining a material most promising in the view of its photoresponsive behavior. The montmorillonite modification was performed in a two-step procedure, as the direct intercalation of a nonionic azobenzene is not possible. First, the Na-montmorillonite (denoted SWy) was ion-exchanged with trimethylalkylammonium cations abbreviated C n and benzyldimethylalkylammonium cations – BC n , where n refers to the number of carbon atoms in the alkyl chain and is equal to 12, 14 or 16. In the second step the organo-montmorillonites were reacted with azobenzene (AzBz) for 24 h at 120°C in a hermetically closed teflon vessel. The yellowish products were characterized with the X-Ray diffraction (XRD), the infrared spectroscopy (FTIR) and CHN elemental analysis. In all cases the intercalation of the ammonium cation caused an increase of the montmorillonites basal spacing ( d 001 ). The d 001 values were equal to 16.4 Å, 18.2 Å and 20.5 Å for SWy-C 12 , SWy-C 14 and SWy-C 16 , respectively. The samples modified with the BC n cations showed ~1.5 Å larger basal spacing, due to the presence of the benzyl group in the intercalated molecule. A linear relationship was observed between the d 001 value and the alkyl chain length of the introduced salts. This suggests that the organic cations formed paraffin-type aggregates in the interlayer (Ogawa et al. 1999) where the molecules are inclined to the layer surface. The FTIR spectra of modified SWy sample showed intense bands corresponding to CH 2 vibration modes. Along with the increasing alkyl chain length the CH 2 stretching bands shifted towards lower energies. This is an effect of growing packing density of alkylammonium molecules in the interlayer (He et al. 2004) and it is coupled with straightening of the alkyl chains due to transformation of disordered gauche conformer to the ordered all-trans conformer (Vaia et al. 1994). It can be concluded that the longer alkyl chains (C 16 and BC 16 ) form more ordered, solid-like aggregates in the interlayer space. The molar content of organic molecules was calculated basing on the CHN elemental analysis. The amount of intercalated alkylammonium cations was nearly equal to the cation exchange capacity (CEC) of montmorillonite – 88.9 meq/100 g. The reaction with azobenzene was most effective for montmorillonite modified with the alkylammonium cations having the longest chains as confirmed by the XRD patterns. The d 001 values of SWy-C 16 and SWy-BC 16 samples after reaction with AzBz increased to 36.9 Å and 35.9 Å, respecively. Well resolved and intense (001) peaks as well as the presence of the 2 nd and 3 rd order reflections indicated a highly ordered structure of these intercalates. On the contrary, diffraction peaks were less resolved and broadened for samples prepared with the shorter C 12 , C 14 , BC 12 and BC 14 molecules after reaction with AzBz. Based on these results, it is assumed that the long chain alkylammonium ions are more effective surfactants for the further intercalation of azobenzene into the montmorillonites interlayer space. The obtained highly ordered structures are promising materials for application as photo-actuated nanoswitches.
Źródło:
Geology, Geophysics and Environment; 2016, 42, 1; 87-88
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An adsorption of bovine serum albumin on carbon/zirconium oxide microfiltration membranes at different pH’s as determined from breakthrough curves
Autorzy:
Białopiotrowicz, T.
Blanpain, P.
René, F.
Lalande, M.
Powiązania:
https://bibliotekanauki.pl/articles/346995.pdf
Data publikacji:
2002
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:
BSA adsorption
inorganic membranes
breakthrough curve
Opis:
Adsorption of bovine serum albumin (BSA) at different pHs on carbon supported microfiltration (MF) inorganic membranes was measured by using breakthrough (BT) curves derived from liquid frontal chromatography. Adsorption was quantified in the presence of permeation through the membrane thickness at a constant flow rate. Using the method described, it was confirmed that BSA adsorption is dependent on pH and its maximum is near the BSA isoelectric point ( i.e. pH 4.9). Using Langmuir’s equation, monolayer capacities were determined. It was found that adsorption is of monomolecular type. Analysis of the methods ( called algorithms) used for adsorption calculation was carried out. Monolayer capacities found were generally lower than theoretical BSA monolayer capacity in side-on orientation. It was concluded that such effects as pore blocking, deposition of aggregates inside the membrane or slow formation of dimers were not the main mechanisms of BSA uptake by the MF membranes studied during BT curve formation.
Źródło:
Ars Separatoria Acta; 2002, 1; 111-137
1731-6340
Pojawia się w:
Ars Separatoria Acta
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anatomy of contaminated aquifers of an industrial site : insights from the stable isotope compositions of waters and dissolved inorganic carbon
Autorzy:
Vennemann, T. W.
Angloher-Reichelt, S.
Powiązania:
https://bibliotekanauki.pl/articles/2058959.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
isotope compositions
inorganic carbon
geological cross-section
Opis:
The hydrogen and oxygen isotopes of water and the carbon isotope composition of dissolved inorganic carbon (DIC) from different aquifers at an industrial site, highly contaminated by organic pollutants representing residues of the former gas production, have been used as natural tracers to characterize the hydrologic system. On the basis of their stable isotope compositions as well as the seasonal variations, different groups of waters (precipitation, surface waters, groundwaters and mineral waters) as well as seasonably variable processes of mixing between these waters can clearly be distinguished. In addition, reservoir effects and infiltration rates can be estimated. In the northern part of the site an influence of uprising mineral waters within the Quaternary aquifers, presumably along a fault zone, can be recognized. Marginal infiltration from the Neckar River in the east and surface water infiltration adjacent to a steep hill on the western edge of the site with an infiltration rate of about one month can also be resolved through the seasonal variation. Quaternary aquifers closer to the centre of the site show no seasonal variations, except for one bore hole close to a for mermill channel and an other bore hole adjacent to a rain water channel. Distinct carbon isotope compositions and concentrations of DIC for these different groups of waters reflect variable influence of different components of the natural carbon cycle: dissolution of marine carbonates in the mineral waters, biogenic, soil-derived CO2 in ground- and surface waters, as well as additional influence of atmospheric CO2 for the surface waters. Many Quaternary aquifer waters have, how ever, distinctly lower δ13CDIC values and higher DIC concentrations compared to those expected for natural waters. Given the location of contaminated groundwaters at this site but also in the industrially well-developed valley out side of this site, the most likely source for the low δ13CDIC values is a biodegradation of anthropogenic organic substances, in particular the taroils at the site.
Źródło:
Geological Quarterly; 2005, 49, 2; 113-126
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of reagents concentration on the efficiency of obtaining high-purity magnesium hydroxide
Autorzy:
Radomski, Piotr
Jarosiński, Andrzej
Wzorek, Zbigniew
Nowak, Anna K.
Powiązania:
https://bibliotekanauki.pl/articles/778842.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
magnesium hydroxide
precipitation method
inorganic flame retardants
Opis:
The work presents the impact of reagents concentration and the drying process on the efficiency of obtaining magnesium hydroxide and its specific surface area. Magnesium sulphate(VI) within the concentration range of 0.7–2.0 mol/dm3  was used in the research as magnesium feedstock and sodium hydroxide was used as a precipitating agent within the same concentration range. The process of obtaining magnesium hydroxide was carried out with a 25% excess of the precipitating agent in relation to the reaction stoichiometry. The obtained suspension was separated by way of multi-stage sedimentation with the use of acetone and freezing samples. Depending on the concentration of reagents the efficiency of obtaining magnesium hydroxide fell within the range of 88–99%, whereas the specific surface area – within 115–609 m2 /g, while the high purity of samples above 99% of magnesium hydroxide was maintained.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 2; 73-77
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Separation and Immobilization of Vanadium from Industrial Fly Ash as an Insoluble Inorganic Pigmen
Autorzy:
Kwolek, P.
Czubajewski, K.
Wojnicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/351844.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
recovery
inorganic pigments
solubility
vanadium
bismuth
immobilisation
Opis:
It has been shown that the precipitation of bismuth orthovanadate from a fly ash leachate is a promising method of vanadium recovery. BiVO4 obtained after appropriate heat treatment can be sold as a pigment. The yield of recovery of solubilised vanadium is equal to 68% and the precipitate is free from nickel impurity. The precipitate is insoluble in the solutions with pH ≥ 3. In more acidic media the solubility of precipitate increases with the decreasing pH. The solubility of the precipitate increases also with the increasing concentration of chloride ions.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 901-909
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adam Bielański (1912-2016)
Autorzy:
Witko, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/703985.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Adam Bielański
chemistry
inorganic chemistry
catalysis
surface chemistry
Opis:
On September 4, died at the age of 100 Adam Bielański, Professor of Chemistry, an outstanding scientist, widely recognized authority in the field of inorganic chemistry, catalysis and surface chemistry.
Źródło:
Nauka; 2016, 4
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Organic Manure and Inorganic Fertilizers on Seed Germination of Green Gram (Vigna radiata L.)
Autorzy:
Vaithiyanathan, T.
Sundaramoorthy, P.
Powiązania:
https://bibliotekanauki.pl/articles/1190122.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Agriculture
inorganic fertilizer
organic fertilizer
Vigna radiata L.
Opis:
India is one of the agricultural country and food is very important need for our country because growth of population. Nowadays various inorganic fertilizers used for agriculture for high yield purposes but it affect the soil fertility and living organisms. Chemical fertilizers are very costly and it produced environmental pollution. Organic compost is cost effective and sustainable. In this attempt the effect of various organic fertilizers (farm yard manure, vermicompost and composted coirpith) and inorganic fertilizers (nitrogen, phosphorus and potassium) on germination of green gram (Vigna radiata L.). The following parameters were analyzed such as germination percentage, seedling length, fresh weight, dry weight and photosynthetic pigments such as chlorophyll a, chlorophyll b, total chlorophyll and carotenoid. As the result of this study that all above the parameters were increased in vermicompost applicator soil of the plant compared to the other organic and inorganic fertilizers. This study concluded that vermicompost is very used for the crop production.
Źródło:
World Scientific News; 2016, 35; 111-122
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Third Scientific and Technical Conference "Minerals Sorbents", Raw Materials, Power Engineering, Environmental Protection, Modern Technologies, 18–19 September 2017, Cracow
Autorzy:
Bajda, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/127576.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
organic substances
inorganic substances
modern science
industry
editorial
Opis:
We present an issue containing articles that were presented at the Third Scientific and Technical Conference "Minerals Sorbents", Raw Materials, Power Engineering, Environmental Protection, Modern Technologies, which took place on 18–19 September 2017 in Cracow. The conference was a great forum for exchanging experiences, presenting the latest research achievements of the country's leading scientific units to the representatives of the key industry sectors whose production technologies are based on the use of mineral sorbents.
Źródło:
Mineralogia; 2017, 48, 1/4; 1-2
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variation of lignite ash in vertical and horizontal sections of mining walls in the Konin Lignite Mine, central Poland
Autorzy:
Chomiak, Lilianna
Powiązania:
https://bibliotekanauki.pl/articles/184783.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Middle Miocene
backswamp area
inorganic matter
coefficient of variation
Opis:
This paper focuses on the variations of lignite ash along selected sections and mining walls from three lignite opencast mines in central Poland. They are owned by the Konin Lignite Mine, where the first Mid-Polish lignite seam is being mined to produce electricity. Ash content in lignite is important because ash lowers the calorific value of the lignite. The results obtained are based on 266 samples of lignite collected from the Drzewce, Tomisławice, and Jóźwin IIB opencasts. All samples were tested according to ISO 1171 standard procedures, that is, they were first burned at a temperature of 850°C, then the ash content was determined on a dry basis (Ad ), before the basic statistical parameters were calculated. The studied lignite seam is characterised by a variable distribution pattern of ash both along selected vertical sections and lignite walls, as well as between the three opencasts. The ash content of individual samples ranged from 6.5 to 69.8 wt%, while the average content in opencast mines varied from 9.7 to 17.6 wt%. The coefficient of variation is large (80.23–96.33%) in the case of the Drzewce and Tomisławice, and low to average (14.53–37.75%) in the case of Jóźwin IIB. Significant ash enrichment of some beds is interpreted in this article as a consequence of floods occurring in a Mid-Miocene mire (backswamp), but also of chemical precipitation. When lignite is burned to generate electricity, a relatively large amount of ash is produced. Therefore, recognition of ash content in lignite, in addition to the chemical composition and phase of ash, is recommended to better protect the environment. At the first stage of protection, it can be best achieved by analysing field samples for ash content.
Źródło:
Geology, Geophysics and Environment; 2020, 46, 1; 17-28
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie ceramicznych membran ultrafiltracyjnych do usuwania substancji powierzchniowo czynnych z roztworów wodnych
Use of ceramic ultrafiltration membranes for the removal of surfactants from water solutions
Autorzy:
Kowalska, I.
Powiązania:
https://bibliotekanauki.pl/articles/237111.pdf
Data publikacji:
2011
Wydawca:
Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:
surfaktant
ciśnieniowy proces membranowy
membrana nieorganiczna
surfactant
inorganic membrane
Opis:
Zbadano właściwości transportowe i separacyjne rurowych membran ceramicznych wykonanych z dwutlenku tytanu i cyrkonu w stosunku do wodnych roztworów anionowej substancji powierzchniowo czynnej (dodecylobenzenosulfonian sodu - SDBS). Określono wpływ stężenia SDBS w roztworze zasilającym, a także granicznej rozdzielczości membran oraz warunków procesowych na wydajność procesu ultrafiltracji realizowanego w układzie przepływu krzyżowego (cross-flow). Wykazano, że układ separacyjny z membranami ceramicznymi zapewnił zadowalającą eliminację SDBS z roztworów wodnych. W zakresie analizowanych stężeń SDBS zaobserwowano rosnącą podatności membran na blokowanie wraz ze wzrostem ich granicznej rozdzielczości (cut-off). Stwierdzono też istotny wpływ warunków procesowych (ciśnienie transmembranowe, liniowa prędkość przepływu roztworu zasilającego przy powierzchni membrany) na właściwości transportowo-separacyjne membran. Wykazano, że ceramiczne membrany ultrafiltracyjne zapewniają stabilną pracę układu separacyjnego w warunkach długotrwałej filtracji.
Tubular ceramic membranes made of titanium and zirconium dioxides were tested for transport and separation properties with respect to the aqueous solutions of an anionic surface-active substance (sodium dodecylbenzenesulfonate, SDBS). Examined was the problem of how the concentration of SDBS in the feed solution, the molecular weight cut-off (MWCO) of the membranes, and the process conditions influence the efficiency of ultrafiltration performed in a cross-flow system. It has been demonstrated that the separation system involving ceramic membranes provides a sufficiently high SDBS removal from water solutions. Within the range of the SDBS concentrations examined, it has been observed that the membranes were susceptible to fouling, and that this susceptibility increased with the increase in the MWCO value. The effect of the process conditions (transmembrane pressure and cross-flow velocity of the feed solution at the membrane surface) on the transport and separation properties of the ceramic membranes was also found to be of significance. The study has revealed that ceramic ultrafiltration membranes provide a stable operation of the separation system under conditions of long-term filtration.
Źródło:
Ochrona Środowiska; 2011, 33, 1; 41-45
1230-6169
Pojawia się w:
Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological Evaluation of Variously Intercalated Pre-baked Clay
Autorzy:
Ullah, H.
Imtiaz, A.
Powiązania:
https://bibliotekanauki.pl/articles/778613.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
clay
alkali metal intercalation
inorganic modifier
scanning electron microscopy
Opis:
The use of porous materials is enjoying tremendous popularity and attention of the advance scientific communities due to their excellent adsorptive and catalytic activities. Clays are one of the most important candidates in the porous community which shows the above mentioned activities after modifing with a different intercalating agent. The paper is focused on the infiuence of some inorganic intercalating agents (NaOH) on the morphology of the variously intercalated clay samples. The alkali metal was used as the inorganic intercalating agent. The effect of intercalation temperature, intercalation agent concentration and intercalation time on the pre-baked clay morphology were also part of the study. Scanning electron microscopy (SEM) study was performed to evaluate the morphological changes of the resultant intercalates. Different morphological properties were improved significantly in the case of the inorganically modified clay samples. Thus, such intercalations are suggested to be effective if the clays under study are to be used for different industrial process at elevated conditions.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 2; 5-11
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of bacterial activities on nitrogen uptake rates determined by the application of antibiotics
Autorzy:
Tungaraza, C.
Brion, N.
Rousseau, V.
Baeyens, W.
Goeyens, L.
Powiązania:
https://bibliotekanauki.pl/articles/48700.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
bacterial activity
inorganic nutrient
antibiotic
bacteria
nitrogenous nutrient
phytoplankton
Opis:
The influence of bacterial activities on inorganic nutrients has always affected total phytoplankton uptake rates owing to the absence of a reliable method that can exclude these effects. The use of natural samples to determine the contribution of bacterial activities has been based on the size fractionation method which, unfortunately, is encumbered with uncertainties, especially because of the size overlap between bacteria and phytoplankton communities. In this paper, the results are reported of an estimation of bacterial activities by the use of inhibitors (antibiotics). It was shown that the contribution of bacterial activities to the uptake of nitrogenous nutrients was highest for ammonium (79%), followed by nitrate (72%) and urea (62%). In a second set of experiments the concentration of ammonium was raised by 5 μM. This was done to avoid nutrient limitation resulting from the absence of recycled nutrients following the addition of antibiotics and the maximum contribution of bacterial activity to the uptake rate of ammonium increased to 87%. It can be concluded that the use of inhibitors is a good method, a reliable alternative to the fractionation method. However, it is important to note that inhibitors can affect both phytoplankton growth and the nutrient recycling process. Our results indicate that the application of antibiotics had measurable effects not only on the target bacteria but also on the uptake behaviour of phytoplankton. Our observations were therefore limited to the period when there was no effect on the phytoplankton, as was demonstrated by a carbon protein incorporation experiment.
Źródło:
Oceanologia; 2003, 45, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduction of organic and inorganic pollutant from waste water by algae
Autorzy:
Sahu, O.
Powiązania:
https://bibliotekanauki.pl/articles/11244.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
pollutant
reduction
organic pollutant
inorganic pollutant
waste water
alga
Opis:
Recently, algae have become significant organisms for biological purification of wastewater since they are able to accumulate plant nutrients, heavy metals, pesticides, organic and inorganic toxic substances and radioactive matters in their cells/bodies. Biological wastewater treatment systems with micro algae have particularly gained importance in last 50 years and it is now widely accepted that algal wastewater treatment systems are as effective as conventional treatment systems. These specific features have made algal wastewaters treatment systems an significant low-cost alternatives to complex expensive treatment systems particularly for purification of municipal wastewaters. By this method 70 % of biological oxygen demand, 66 % of chemical oxygen demand, 71 % total nitrogen, 67 % of phosphorus, 54 % volatile solid and 51 % of dissolved solid was reduced.
Źródło:
International Letters of Natural Sciences; 2014, 08, 1
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leaching kinetics of atrazine and inorganic chemicals in tilled and orchard soils
Autorzy:
Szajdak, L.W.
Lipiec, J.
Siczek, A.
Nosalewicz, A.
Majewska, U.
Powiązania:
https://bibliotekanauki.pl/articles/25267.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
leaching
kinetics
atrazine
inorganic chemical
tilled soil
orchard soil
Opis:
The aim of this study was to verify first-order kinetic reaction rate model performance in predicting of leaching of atrazine and inorganic compounds (K+1, Fe+3, Mg+2, Mn+2, NH4 +, NO3 - and PO4 -3) from tilled and orchard silty loam soils. This model provided an excellent fit to the experimental concentration changes of the compounds vs. time data during leaching. Calculated values of the first-order reaction rate constants for the changes of all chemicals were from 3.8 to 19.0 times higher in orchard than in tilled soil. Higher first-order reaction constants for orchard than tilled soil correspond with both higher total porosity and contribution of biological pores in the former. The first order reaction constants for the leaching of chemical compounds enables prediction of the actual compound concentration and the interactions between compound and soil as affected by management system. The study demonstrates the effectiveness of simultaneous chemical and physical analyses as a tool for the understanding of leaching in variously managed soils.
Źródło:
International Agrophysics; 2014, 28, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dewatering of barite clay wastewater by inorganic coagulants and co-polymer flocculants
Autorzy:
Deniz, V.
Powiązania:
https://bibliotekanauki.pl/articles/109684.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
dewatering
sedimentation
inorganic coagulant
co-polymer flocculants
wastewater
barite
Opis:
This work is focused on dewatering of barite-containing clay waste from a barite beneficiation plant by coagulation and flocculation to enhance the dewatering rate and recycling of process water. A flocculation performance of co-polymers (Superfloc A-130 and A-100) was compared with coagulants (Al2SO418H2O, CaCl2 and FeCl36H2O). The best results were obtained with an anionic co-polymer, i.e. Superfloc A-130. The settling rate increased 635-fold in the case of using anionic co-polymer Superfloc A-130 in comparison with the natural settling rate of the same wastewater. In laboratory tests, an optimum thickener design was developed for the barite clay wastewater. In this paper, sedimentation studies on the barite clay wastes are presented for the first time, both as the laboratory studies and industrial applications.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 1; 351-364
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency of Integrated Nutrient Management to Improve Eggplant Production in Intercropping Systems
Autorzy:
Maghfoer, Moch. Dawam
Lehar, Laurensius
Lestari, Mahayu Woro
Powiązania:
https://bibliotekanauki.pl/articles/2202188.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
inorganic N
integrated nutrient management
intercropping system
manure
microbes
Opis:
Eggplant is a vegetable that is widely cultivated in Indonesia. Fertilization is one of the most influential factors to increase eggplant productivity. The research to improve the eggplant productivity through the application of various nitrogen nutrient sources in an integrated nutrient management system and an intercropping system with cabbage was carried out from June to December 2019 in Wonorejo, Poncokusumo-Malang. The study was conducted using a randomized block design (RBD) with 21 treatments and was repeated 3 times. The treatments were D0 = Control (180 kg N) and (D1–D20), which were various combinations of inorganic N fertilizers, manure, and microbes (EM and PGPR). Observations included the number of leaves and stem diameter of eggplant, number of cabbage leaves, number of fruit per plant, fruit weight (per plant, per hectare, and per fruit), and Land Equivalent Ratio (LER), soil analysis before and after the research. The results showed that the combination of 75% inorganic fertilizer + 20–30 t·ha-1 manure + 10–20 ml·l-1 microbe (EM / PGPR) in the eggplant – cabbage intercropping system increased the growth and yield of eggplant, with fruit weights ranging 1.86–2.35 kg·plant-1 or 40.88–53.17 t·ha-1, and LER value was 1.94–2.04.
Źródło:
Journal of Ecological Engineering; 2022, 23, 11; 217--227
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response of Soil Phosphatases to Three Different Ionic Liquids With Hexafluorophosphate Anion
Autorzy:
Telesiński, A.
Śnioszek, M.
Biczak, R.
Pawłowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/123035.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
ionic liquids
soil
phosphomonoesterases
phosphotriesterase
inorganic pyrophosphatase
resistance index
Opis:
The aim of this study was to determine the effect of three different ionic liquids (ILs): 1-butyl-1-methylpyrrolidynium hexafluorophosphate [Pyrrol][PF6], 1-butyl-1-methylpiperydynium hexafluorophosphate [Piper][PF6] and 1-butyl-4-methylopirydynium hexafluorophosphate [Piryd][PF6] on phosphatase activities in soil. The pot experiment was carried out on loamy sand (Corg content 9.0 g/kg) with spring barley as a tested plant. The ILs was used at the dosages of 0, 1, 10, 50, 100, 400, 700 and 1000 mg/kg dry matter (DM). On day 14, soil samples were collected and activities of alkaline phosphomonoesterase, acid phosphomonoesterase, phosphotriesterase and inorganic pyrophosphatase were determined. Based on the analysis of the effect measure η2 by variance analysis – ANOVA – the percentage shares of all variable factors affecting the activity of phosphatases were also defined. Obtained results showed that the application of different dosages of all ILs caused mainly non-significant changes in phosphatase activity. Changes in activity of phosphatases were often not dependent on IL dosages. The most sensitive for ILs were both phosphomonoesterases. The type of ILs had the highest percentage participation in formation of acid phosphomonoesterase activity, while dosages of ILs affected mainly alkaline phosphomonoesterase and phosphotriesterase activities.
Źródło:
Journal of Ecological Engineering; 2017, 18, 2; 86-91
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decoring Behaviour of Chosen Moulding Materials with Alkali Silicate Based Inorganic Binders
Autorzy:
Conev, M.
Vasková, I.
Hrubovčáková, M.
Hajdúch, P.
Powiązania:
https://bibliotekanauki.pl/articles/356323.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inorganic binder
alkali silicates
moulding material
knock-out properties
Opis:
This paper contains basic information about new processes for cores for cylinder heads production with alkali silicate based inorganic binders. Inorganic binders are coming back to the foreground due to their ecologically friendly nature and new technologies for cores production and new binder systems were developed. Basically these binder systems are modified alkali silicates and therefore they carry some well-known unfavourable properties with their usage. To compensate these disadvantages, the binder systems are working with additives which are most often in powder form and are added in the moulding material. This paper deals with decoring behaviour of different moulding sands as well as the influence of chosen additives on knock-out properties in laboratory terms. For this purpose, specific methods of specimen production are described. Developed methods are then used to compare decoring behaviour of chosen sands and binder systems.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 703-706
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regenerowalność mas formierskich z nowymi spoiwami nieorganicznymi przeznaczonymi dla odlewów z metali nieżelaznych
Reclamability of moulding sands with new inorganic binders for non-ferrous castings
Autorzy:
Izdebska-Szanda, I.
Angrecki, M.
Palma, A.
Powiązania:
https://bibliotekanauki.pl/articles/391528.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
modyfikowane spoiwa nieorganiczne
regeneracja
regenerowalność
modified inorganic binders
reclamation
reclamability
Opis:
W artykule przedstawiono wyniki badań, stanowiących wycinek prac prowadzonych w ramach projektu POIG.01.01.02-00-015/09 „Zaawansowane materiały i technologie”, którego jednym z celów jest wprowadzenie do wykonywania odlewów z metali nieżelaznych, nowych, ekologicznych spoiw nieorganicznych. Zastosowanie modyfikowanych chemicznie spoiw nieorganicznych ma na celu poprawę wybijalności i związanej z tym regenerowalności mas formierskich z udziałem stosowanego dotychczas w odlewnictwie spoiwa nieorganicznego (szkła wodnego), a tym samym umożliwienie stosowania spoiw ekologicznych do odlewania stopów metali nieżelaznych. Regeneracja mas formiersko-rdzeniowych jest podstawowym i efektywnym sposobem zagospodarowania odpadów na miejscu w odlewni, zgodnie z wytycznymi ochrony środowiska. Dlatego przeprowadzone zostały badania regeneracji zużytych mas formiersko-rdzeniowych z nowymi gatunkami spoiw nieorganicznych opracowanych w ramach projektu. Wyniki tych badań zaprezentowano w artykule. Badania te pozwoliły na określenie stopnia odzysku materiału użytecznego, jakim jest piasek zregenerowany, jak i stopnia jego wykorzystania w procesie produkcyjnym. W artykule przedstawiono również wyniki badań regeneracji wielokrotnej, stanowiące kontynuację wcześnie prowadzonych badań wstępnych. Opisane w artykule badania obejmują również walidację wyników w warunkach przemysłowych.
The article presents results of an investigation which constitutes a section of research under the project POIG.01.01.02-00-015/09 “Advanced materials and technologies”, one of the aims which is the introduction of new ecological inorganic binders into making casts from non-ferrous metals. The application of chemically modified inorganic binders aims at improving knock-out properties and related to it reclamability of moulding sands with the participation of, previously used in foundry practice, inorganic binder (water glass), and at the same time allowing the application of ecological binders for casting non-ferrous metal alloys. Reclamation of moulding and core sands is a fundamental and effective way to manage waste on site at the foundry in accordance with the environmental guidelines. Therefore, studies of reclamation of waste moulding and core sands with new types of inorganic binders, developed within the framework of the project, were carried out. The article presents these results of the investigation. These studies allowed determining the degree of recovery of useful material, that is the reclaimed sand, and the degree of its utilisation in the production process. The article also presents the investigation results of multiple reclamation, which is the continuation of a previously conducted initial investigation. The investigation described in the present article also includes the validation of results under industrial conditions.
Źródło:
Prace Instytutu Odlewnictwa; 2013, 53, 4; 3-16
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Total and inorganic arsenic in fish, seafood and seaweeds - exposure assessment
Autorzy:
Mania, M.
Rebeniak, M.
Szynal, T.
Wojciechowska-Mazurek, M.
Starska, K.
Ledzion, E.
Postupolski, J.
Powiązania:
https://bibliotekanauki.pl/articles/874965.pdf
Data publikacji:
2015
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
total arsenic
inorganic arsenic
fish
seaweed
exposure assessment
marine food
Opis:
Background. According to the European Food Safety Authority (EFSA), fish, seafood and seaweeds are foodstuffs that significantly contribute to dietary arsenic intake. With the exception of some algal species, the dominant compounds of arsenic in such food products are the less toxic organic forms. Both the Joint FAO/ WHO Expert Committee on Food Additives (JECFA) and EFSA recommend that speciation studies be performed to determine the different chemical forms in which arsenic is present in food due to the differences in their toxicity. Knowing such compositions can thus enable a complete exposure assessment to be made. Objectives. Determination of total and inorganic arsenic contents in fish, their products, seafood and seaweeds present on the Polish market. This was then followed by an exposure assessment of consumers to inorganic arsenic in these foodstuffs. Materials and Methods. Total and inorganic arsenic was determined in 55 samples of fish, their products, seafood as well as seaweeds available on the market. The analytical method was hydride generation atomic absorption spectrometry (HGAAS), after dry ashing of samples and reduction of arsenic to arsenic hydride using sodium borohydride. In order to isolate only the inorganic forms of arsenic prior to mineralisation, samples were subjected to concentrated HCl hydrolysis, followed by reduction with hydrobromic acid and hydrazine sulphate after which triple chloroform extractions and triple 1M HCl re-extractions were performed. Exposure of adults was estimated in relation to the Benchmark Dose Lower Confidence Limit (BMDL05) as set by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) that resulted in a 0.5% increase in lung cancer (3.0 μg/kg body weight (b.w.) per day). Results. Mean total arsenic content from all investigated fish samples was 0.46 mg/kg (90th percentile 0.94 mg/kg), whilst the inorganic arsenic content never exceeded the detection limit of the analytical method used (0.025 mg/kg). In fish products, mean total arsenic concentration was 1.48 mg/kg (90th percentile: 2.42 mg/kg), whilst in seafood they were 0.87 mg/ kg (90th percentile: 2.23 mg/kg), for inorganic arsenic contamination at the 90th percentile was 0.043 mg/kg with most results however being less than 0.025 mg/kg. The highest inorganic arsenic levels were determined in the Hijiki algal species samples (102.7 mg/kg), whereas the other algal samples gave a mean inorganic concentration of 0.41 mg/kg (90th percentile 0.86 mg/kg). The estimated average adults exposure to inorganic arsenic in fish, seafood and seaweeds was less than 0.5% of the lowest BMDL0.5 dose. Only for the Hijiki seaweed it was at 4.9% BMDL0.5. Conclusions. Results demonstrate that dietary arsenic intake from fish, seafood and seaweed along with all their products do not constitute a significant health threat to consumers apart from the seaweed species Hizikia fusiformis in which over 40% of all the inorganic arsenic compounds were found.
Wprowadzenie. Ryby, owoce morza i wodorosty morskie należą do grupy środków spożywczych, które według Europejskiego Urzędu ds. Bezpieczeństwa Żywności (EFSA) mogą wnosić istotny udział do pobrania arsenu z dietą. W tej grupie produktów za wyjątkiem niektórych gatunków glonów, dominującymi formami arsenu są mniej toksyczne organiczne połączenia. Zarówno Połączony Komitet Ekspertów FAO/WHO ds. Substancji Dodatkowych do Żywności (JECFA) jak i EFSA wskazują na celowość prowadzenia badań specjacyjnych pozwalających określić różne formy chemiczne, w jakich arsen występuje w żywności, mając na uwadze duże różnice w ich toksyczności. Poznanie informacji o zawartości poszczególnych związków pozwala na dokonanie pełnej oceny narażenia. Cel badań. Oznaczenie zawartości arsenu całkowitego i nieorganicznego w rybach i ich produktach, owocach morza i wodorostach morskich dostępnych w obrocie handlowym w Polsce oraz ocena narażenia konsumentów na pobranie arsenu nieorganicznego z tymi grupami środków spożywczych. Materiał i metody. Analizie na zawartość arsenu całkowitego i nieorganicznego poddano 55 próbek ryb, ich produktów, owoców morza oraz glonów pochodzących z obrotu handlowego. Zawartości arsenu całkowitego i nieorganicznego oznaczono po suchej mineralizacji próbek metodą absorpcyjnej spektrometrii atomowej z wykorzystaniem generacji wodorków (HGAAS), po uprzedniej redukcji arsenu do arsenowodoru za pomocą borowodorku sodu. W celu wydzielenia nieorganicznych form arsenu próbki przed mineralizacją poddano hydrolizie w środowisku stężonego HCl, a następnie redukcji w obecności kwasu bromowodorowego i siarczanu hydrazyny oraz 3-krotnej ekstrakcji chloroformem i reekstrakcji 1M HCl. Oszacowane narażenie w odniesieniu do osób dorosłych porównano z wartością najniższej dawki wyznaczającej (Benchmark Dose Lower Confidence Limit) BMDL0,5 ustalonej przez The Joint FAO/WHO Expert Committee on Food Additives (JECFA) powodującej 0,5%-owy wzrost zachorowań na raka płuc (3,0 μg/kg m.c./dzień). Wyniki. Średnia zawartość arsenu całkowitego w badanych próbkach ryb wyniosła 0,46 mg/kg (90-ty percentyl: 0,94 mg/kg), natomiast arsenu nieorganicznego nie przekraczała granicy wykrywalności stosowanej metody 0,025 mg/kg. W przypadku przetworów rybnych średnie zanieczyszczenie arsenem wyniosło 1,48 mg/kg (90-ty percentyl: 2,42 mg/kg) natomiast owoców morza odpowiednio: 0,87 mg/kg (90-ty percentyl: 2,23 mg/kg), dla arsenu nieorganicznego 90-ty percentyl 0,043 mg/kg przy większości wyników poniżej 0,025 mg/kg. Najwyższym zanieczyszczeniem arsenem nieorganicznym charakteryzowały się glony z gatunku Hijiki (najwyższa zawartość 102,7 mg/kg), w pozostałych próbkach glonów średnia zawartość arsenu nieorganicznego wynosiła 0,41 mg/kg (90-ty percentyl: 0,86 mg/kg). Oszacowane średnie narażenie na arsen nieorganiczny w odniesieniu do osób dorosłych wyniosło dla ryb, owoców morza i wodorostów poniżej 0,5% wartości najniższej dawki wyznaczającej BMDL0,5. Jedynie w przypadku gatunku Hijiki było ono rzędu 4,9 % BMDL0,5. Wnioski. Na podstawie uzyskanych wyników stwierdzono, że pobranie arsenu w wyniku spożycia ryb, ich produktów, owoców morza, oraz wodorostów morskich nie stanowi istotnego zagrożenia dla zdrowia konsumentów poza gatunkiem Hizikia fusiformis zawierającym ponad 40% połączeń nieorganicznych arsenu.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2015, 66, 3
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The oily wastewater treatment using the nanofiltration process
Autorzy:
Orecki, A.
Tomaszewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/778647.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
nanofiltracja
odolejanie ścieków
związki nieorganiczne
nanofiltration
oily wastewater
inorganic compounds
Opis:
The objective of this work was to investigate the possibility of oily wastewater treatment using the nanofiltration (NF) process. The NF studies were carried out with a permeate obtained from ultrafiltration (UF) (used for the treatment of the oily wastewater from metal industry). The influence of transmembrane pressure on a permeate flux, the degree of the rejection of oil and inorganic compounds was investigated. The studies on the NF treatment of oily wastewater demonstrated a high effectiveness of the rejection of oil and inorganic compounds. The permeate obtained from the treatment was free of oil. Moreover, the retention coefficient of the inorganic compounds was higher than 75% for all the cations examined (Na+, K+, Mg2+, Ca2+, Zn2+, Cu2+) and higher than 95% for sulphates. Therefore, the permeate obtained in the NF process can be reused for fresh emulsion preparation.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 4; 40-42
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyrafinowane spektroskopowe metody instrumentalne w badaniach związków nieorganicznych
Sophisticated instrumental spectroscopy methods in studies of inorganic compounds
Autorzy:
Jurowski, K.
Jurowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/134871.pdf
Data publikacji:
2015
Wydawca:
ADVSEO
Tematy:
spektroskopia
związki nieorganiczne
metody instrumentalne
instrumental methods
inorganic compounds
spectroscopy
Opis:
The instrumental spectroscopic methods are very important in nowadays scientific studies. The most of instrumental methods (e.g. IR, NMR, EPR, UV-Vis, mass spectrometry) are well grounded and used in the laboratory practice. In the article the methods of instrumental spectroscopy which are very significant in the studies of inorganic compounds were selected and described. The authors paid particular attention to the unpopular methods, such as: Resonance Raman spectroscopy, Mössbauer spectroscopy, Nuclear Quadrupole Resonance and photoelectron spectroscopy. They described spectroscopic base of these methods as well as the application based on the analysis of the particular examples of inorganic compounds. This article is an interdisciplinary review. It is the first work in literature that emphasizes many different and complex aspects of sophisticated spectroscopy methods in the modern inorganic analysis.
Źródło:
Technical Issues; 2015, 4; 11-18
2392-3954
Pojawia się w:
Technical Issues
Dostawca treści:
Biblioteka Nauki
Artykuł
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