Temat: "zinc" - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Evaluating the Effect of the Approaching Electrode on the Migration for Metal Ions through the Electro-Kinetic Technique for Contaminated Soil
Autorzy:: Thamer, Zeina
Khalil, Amal H.
Powiązania:: https://bibliotekanauki.pl/articles/2202378.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: zinc
electrokinetic
remediation
approached anode
Opis:: In this study, three experiments using the fixed anode technique and approached anode technique were carried out. The first experiment (EK-1) used distilled water as leaching solution (purging solution) at the anode and cathode chamber under voltage gradient was equal to 1.5 V/cm. In the second and third experiments, a solution enhanced with 1M acetic acid (AA) was used as catholic solution. The results indicate that residual concentration of Zn+2 decreases, beginning with an initial value of 850 mg/kg in all portions of soil sample EK-1, EK-2, in addition to EK-3. It seems that the residual concentration of EK-3 (approached anode technique) was lower than that of EK-1 and EK-2 in identical portions.
Źródło:: Journal of Ecological Engineering; 2023, 24, 2; 72--80
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of Zinc on the Growth and the Antioxidant System of Lens Culinaris Cultivated on Agar Medium
Autorzy:: Benhamdi, Asma
Kandouli, Chouaib
Cherfia, Radia
Chelouche, Soumia
Boumissa, Zeinb
Benniou, Mohamed Elhadi
Hafdi, Roumeissa
Mechakra, Aicha
Powiązania:: https://bibliotekanauki.pl/articles/1955558.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: growth
Lens culinaris
zinc
oxidative stress
Opis:: This study aimed to analyze the impact of Zn on the growth and the antioxidant response of Lens culinaris. For this purpose, the seeds were germinated for 6 days in an MS/2 culture medium with different Zn concentrations. Malondialdehyde (MDA), total protein contents, and antioxidant enzymes activities were measured in both parts of the plant by spectrometry. The results showed that from the Zn concentration of 250 µM, the growth of lentils is inversely proportional to the concentration of Zn in the culture medium. The variations in the level of MDA are not very significant, but at 10 000 μM of Zn in the medium, the level becomes very important, whilst the total protein content decreased. Besides, the evaluation of enzymatic activities indicated that the decline of peroxidase (POD) is concomitant with the increase in glutathione peroxidase (GPx) and that glutathione S-transferase (GST), as well as catalase (CAT) reach their maximum activities at 10 000 µM and 3000 µM of Zn in upper parts and roots, respectively. These findings revealed that MDA is a real indicator of oxidative stress in Lens culinaris and that this plant is tolerant to the presence of Zn in the culture medium by developing a powerful antioxidant system, but beyond a certain concentration its antioxidant system becomes ineffective and the plant enters a stress state.
Źródło:: Journal of Ecological Engineering; 2021, 22, 9; 13-20
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Contents of Zinc, Copper and Manganese in Potato Tubers Depending on the Ways of Application of the Soil Fertilizer UGmax
Autorzy:: Baranowska, A.
Zarzecka, K.
Gugała, M.
Mystkowska, I.
Powiązania:: https://bibliotekanauki.pl/articles/125446.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: potato
soil fertilizer
copper
zinc
manganese
Opis:: The purpose of this study was to determine the influence of the soil fertilizer UGmax on zinc, copper and manganese contents in potato tubers. A three – year field experiment was carried out on soil which belonged to a very good rye complex. The experiment was established according to randomized split-plot method, in three replications. The following factors were examined: factor I: edible potato varieties (Satina and Typhoon), and factor II: doses and timing of UGmax application. As a result of conducted research, significantly smaller copper content in potato tubers was found, after usage of the soil preparation UGmax, in comparison with a control object, while zinc and manganese content continued to show only a downward trend. The influence of weather conditions and potato varieties on the copper cumulation in the dry mass of potato tuber was proved. An important influence of the factors of the experiment on the uptake of researched macroelements with the potato tuber yield was also shown.
Źródło:: Journal of Ecological Engineering; 2017, 18, 1; 99-106
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The Impact of Methods of Care on the Content and Collection of Zinc and Copper With the Yield of Potato Tubers
Autorzy:: Gugała, M.
Zarzecka, K.
Sikorska, A.
Dołęga, H.
Kapela, K.
Krasnodębska, E.
Powiązania:: https://bibliotekanauki.pl/articles/123165.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: variety
herbicides
biostimulators
zinc
copper
potato
Opis:: The field experiment was conducted in the years of 2012–2014 in the Agricultural Experimental Station Zawady belonging to the University of Natural Sciences and Humanities in Siedlce. The two factor experiment was set up in the split-plot system in triplicate. The investigated factors were: I – three varieties of edible potato: Bartek, Gawin and Honorata. II – five ways of care: 1. Harrier herbicide 295 ZC – 2.0 dm³·ha^-1; 2. Harrier herbicide 295 ZC – 2.0 dm³·ha^-1 with the biostimulator Kelpak SL – 4.0 dm³·ha^-1; 3. Sencor herbicide 70 WG – 1.0 kg·ha^-1; 4. Sencor herbicide 70 WG – 1.0 kg·ha^-1 with the biostimulator Asahi SL – 1.5 dm³·ha^-1; 5. The control object – mechanical care. The content of zinc and copper and their collection with the yield of tubers significantly depended on the ways of care, genetic factor and climatic conditions in the years of the study. In the objects (2, 4) where herbicides were used with biostimulators, a greater concentration of zinc was obtained in relation to the control object and the remaining (3, 5) in which only herbicides were used. The applied care methods did not affect the content of copper in the analysed tubers. The greatest collection of zinc an copper with the yield of tubers was obtained in the objects: where the mixture of the Sencor herbicide 70 WG – 1.0 kg·ha^-1 was used with the biostimulator Asahi SL – 1.5 dm^3-1 and herbicide Sencor 70 WG in a dose of – 1.0 kg ·ha^-1.
Źródło:: Journal of Ecological Engineering; 2016, 17, 4; 289-294
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Content and Uptake of Selected Microelements with Potato Tuber Yield Treated with Biostimulators
Autorzy:: Mystkowska, Iwona
Rogóż-Matyszczak, Anna
Powiązania:: https://bibliotekanauki.pl/articles/124130.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: variant
Solanum tuberosum
varieties
zinc
copper
Opis:: A field experiment was conducted in Międzyrzec Podlaski, (51°59’ N and 22°47’ E), Poland in the period from 2015 to 2017. The experiment was a two-way random split-plot arrangement of plots with three replicates. The following factors were examined: three varieties of potato – Honorata, Jelly, Tajfun, and four variants of application of biostimulants (Kelpak SL, Titanit, GreenOk, BrunatneBio Złoto). The control object comprised potato plants sprayed with distilled water. Biostimulators were applied to potato plants three times (beginning of flowering, full flowering and after flowering of the plants). The aim of the study was to determine the effect of biostimulants on the content and uptake of zinc and copper with the yield of potato tubers. High amount of rainfall in 2017 contributed to an increase in the content of zinc and copper in potato tubers. The tubers of potatoes treated with BrunatneBio Złoto had the highest contenting uptake of Zn and Cu compared to the control plants. The content of microelements in the tubers was significantly dependent on the genotype. The highest concentrations of Zn and Cu were found in the Honorata tubers, and the largest uptake was observed in the Jelly variety.
Źródło:: Journal of Ecological Engineering; 2019, 20, 8; 65-70
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Adsorption of Mercury and Zinc in Agricultural Soils by Sphagneticola trilobata
Autorzy:: Aveiga, Ana
Pinargote, Cruz
Peñarrieta, Fabián
Teca, Jorge
Alcántara, Francisco
Powiązania:: https://bibliotekanauki.pl/articles/2068476.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: phytoremediation
Sphagneticola trilobata
mercury
zinc
soil
wetland
Opis:: Given the imminent deterioration of environmental quality, the accumulation of heavy metals in agricultural soil is one of the main concerns worldwide. Therefore, this research aimed to evaluate the adsorption potential of mercury and zinc by Sphagneticola trilobata. After 60 days, the distribution of heavy metals in the roots and the leaves of the plants was determined. As a result, the plant adsorbed mercury between 43.49 and 59.22%, and zinc between 32.68 and 64.37%. According to the bioconcentration and translocation factors of Sphagneticola trilobata obtained in the present work, the phytostabilizing capacity of mercury and zinc is like Eichhornia crassipes and Sorghum bicolor.
Źródło:: Journal of Ecological Engineering; 2022, 23, 3; 230--235
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Acidity and Sorption Properties of Zinc-Contaminated Soil Following the Application of Neutralising Substances
Autorzy:: Wyszkowski, M.
Modrzewska, B.
Powiązania:: https://bibliotekanauki.pl/articles/124770.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: zinc contamination
compost
bentonite
zeolite
soil properties
Opis:: Soil plays the most important role in the cycling of elements in the terrestrial environment. Contamination of soil with heavy metals have effect on all soil organism and plants. For this reason, studies have been carried out to assess the possibility of neutralising the effect of zinc (0, 150, 300, 600 and 1200 mg Zn kg,^-1 of soil) on soil properties by applying neutralising substances (compost, bentonite and zeolite). Soil acidity and sorption properties depended on zinc contamination and on the type of neutralising substances added. In the series without an addition of neutralising substances, increasing zinc soil contamination resulted in a decrease in total exchangeable bases, in cation exchange capacity and in the saturation degree of the degree of base saturation, and an increase in soil hydrolytic acidity. An addition of bentonite to zinc-contaminated soil had the most advantageous effect of all the additions of neutralising substances on the tested soil properties. It resulted in an increase in soil pH, in total exchangeable bases, in cation exchange capacity, in the degree of base saturation and simultaneously decreased soil hydrolytic acidity compared to the series without additions. Adding zeolite and compost to soil had a small and usually insignificant effect on soil acidity and soil sorption properties.
Źródło:: Journal of Ecological Engineering; 2016, 17, 1; 63-68
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Zinc and lead in bottom sediments and aquatic plants in river Narew
Autorzy:: Skorbiłowicz, E.
Powiązania:: https://bibliotekanauki.pl/articles/124796.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: river
bottom sediment
aquatic plants
zinc
lead
Opis:: Aquatic ecosystems are a valuable part of natural environment. The increasing level of pollution in waters transforming biocoenoses and other adverse effects of the impact of toxic substances have contributed to the development of biological monitoring. The aim of the study was to determine the changes in contents of zinc and lead in bottom sediments and roots of aquatic plants: Phragmites australis and Acorus calamus in the river Narew. There were 14 points on the river, from where samples of bottom sediments and plant material were collected. The contents of lead and zinc were determined by means of flame atomic absorption spectrophotometry using Varian device. It was proven that bottom sediments were characterized by low contents of zinc and lead except from two sampling points: in Bondary and Narew. Achieved results of analyzes of plant material showed a slight exceeding in the case of lead. Spatial distribution of zinc and lead contents in examined roots of plants coincided with their contents in bottom sediments, which was also confirmed by statistical analysis. It was proven that aquatic plants had greater tendency for accumulation of metals than bottom sediments.
Źródło:: Journal of Ecological Engineering; 2015, 16, 1; 127-134
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Fractionation of Selected Heavy Metals (Zn, Ni, Cu) in Municipal Sewage Sludges from Podlasie Province
Autorzy:: Łukowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/124883.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: zinc
nickel
copper
metal fraction
sewage sludge
Opis:: In the samples of fresh dehydrated sewage sludges from municipal treatment plants in Grajewo, Bielsk Podlaski, Sokółka, Dąbrowa Białostocka, Knyszyn, Mońki, Augustów, Suwałki, Sejny and Suchowola the following determinations were made: pH, pseudo-total content of Zn, Ni and Cu, organic matter and dry mass. The contents of the above-mentioned elements in fractions were evaluated using modified BCR method (four fractions: F1-acid soluble and exchangeable, F2-reducible, F3-oxidizable, F4-residual). The zinc content (mean values) in particular fractions can be arranged quantitatively in a sequence: F3 (60.8%) > F2 (20.0%) > F4 (19.9%) > F1 (3.9%), in the case of nickel: F3 ( 48.6%) > F2 (25.2%) > F4 (25.1%) > F1 (5.6%) and in the case of copper: F4 (66.3%) > F3 (35.3%) > F1 (4.2%) > F2 (3.0%). Cumulative content of zinc in mobile fractions (F1+F2+F3) ranged from 76.0 to 93.3%; for nickel from 56.3 to 89.6% and for copper from 28.8 to 53.3% of pseudo-total content.
Źródło:: Journal of Ecological Engineering; 2017, 18, 3; 133-139
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Effect of the application of sewage sludge compost on the content and leaching of zinc and copper from soils under agricultural use
Autorzy:: Bowszys, T.
Wierzbowska, J.
Sternik, P.
Busse, M. K.
Powiązania:: https://bibliotekanauki.pl/articles/125278.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: sewage sludge
composts
zinc
copper
soil leachate
Opis:: Municipal sewage sludge can be used in agriculture provided that the permissible levels of heavy metals are not exceeded in either the sewage sludge or in the top layer of soil to be amended by this substance, and that its application does not deteriorate the soil quality. The purpose of this study was to determine the effects of different forms of sewage sludge on the content of Cu and Zn in soil and in soil leachate. The study comprised 2 rotations (potato, spring barley, winter oilseed rape, winter wheat). Each series was composed of the following treatments: NPK, FYM, municipal sewage sludge composted with straw, dried and granulated municipal sewage. FYM and composted sewage were applied once in the rotation (under potato) in a dose of 10 Mg d.m. ha^-1 and twice (under potato and under winter oilseed rape) in a dose of 5 Mg d.m. ha^-1. In the other years (under spring barley and winter wheat), soil received only mineral fertilization. In order to evaluate the effect of the composts on the leaching of Cu and Zn from soil, a lysimetric experiment was conducted under controlled conditions. Before the experiment, the soil content of Cu was low (1.47 mg kg^-1) and Zn was medium (10.11 mg kg^-1). The content of copper in the composts ranged from 4.5 to 340.1 mg kg^-1 d.m. and that of zinc was from 109.5 to 1310.1 mg kg^-1 d.m. The composted sewage sludge significantly raised the soil content of available forms of Cu and Zn, but did not change the soil nutrient abundance class. Fertilization modified the content of the microelements in the soil leachate.
Źródło:: Journal of Ecological Engineering; 2015, 16, 1; 1-7
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Reduction of Copper, Iron, and Lead Content in Laboratory Wastewater Using Zinc Oxide Photocatalyst under Solar Irradiation
Autorzy:: Agustina, Tuty Emilia
Habiburrahman, Muhammad
Amalia, Farah
Arita, Susila
Faizal, Muhammad
Novia
Gayatri, Rianyza
Powiązania:: https://bibliotekanauki.pl/articles/2202163.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: AOPs
photocatalysis
heavy metals
sunlight
zinc oxide
Opis:: Heavy metal is a type of metal that has a high density and high toxicity when consumed by living things, especially humans. To prevent the impact of environmental pollution, optimal handling of wastewater containing heavy metals is required, including the wastewater from laboratories. This research aimed to study the effect of pH, catalyst dose, and irradiation time on the reduction of Copper (Cu), Iron (Fe), and Lead (Pb) heavy metals and their application to laboratory wastewater treatment. Among the Advanced Oxidation Processes (AOPs) methods, photocatalysis was chosen to reduce the level of Cu, Fe, and Pb heavy metals where zinc oxide (ZnO) is used as a photocatalyst and the sunlight as a light source. To determine the effect of pH, catalyst dose, and time on the reduction of heavy metal levels, firstly, this research used the synthetic wastewater containing Cu, Fe, or Pb heavy metals. On the basis of the experimental results, it is concluded that the pH value, catalyst dose, and time affect the photocatalytic process, decreasing the levels of Cu, Fe, and Pb metals. The optimum pH value obtained for Cu was at pH 7–8, for Fe it was at pH 6, and for Pb it was at pH 8; in turn, the metal removal percentages were 99.46, 99.91, and 99.70%, respectively. In the photocatalysis of synthetic wastewater, high removal percentage of more than 99% was achieved by using 0.1 g/L catalyst. The optimum decrease of metals occurred in the first 15 minutes of solar irradiation where the removal percentage was close to 100%. In this study, the application of ZnO photocatalyst under solar irradiation can reduce the heavy metals content in the laboratory wastewater by almost 100%, which meets the environmental quality standard for Cu, Fe, and Pb.
Źródło:: Journal of Ecological Engineering; 2022, 23, 10; 107--115
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Arsenic, Cadmium, and Thallium Content in the Plants Growing in Close Proximity to a Zinc Works – Long-Term Observations
Autorzy:: Kicińska, Alicja
Powiązania:: https://bibliotekanauki.pl/articles/123666.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: potentially toxic elements
Agrostis capillaris
Betula pendula
zinc works
Opis:: The paper comprises an analysis of the As, Cd, and Tl content in two plant species (Agrostis capillaris and Betula pendula) commonly growing in the vicinity of the Miasteczko Śląskie Zinc Works, in the period of 1998–2018. In 2018, the As, Cd, and Tl content (in mg/kg) in the grasses was 1.10–1.68, 3.14–19.05, and 0.53–5.96, respectively, i.e. lower by 50–70%, compared to the year 1998. The As, Cd, and Tl content (in mg/kg) in birch leaves at the same time point was 0.74–1.54, 4.65–32.44, and 0.80–7.57, respectively, i.e. lower by 10–80%, compared to values found 20 years earlier. In all grass and birch leaf samples collected in 1998 and 2018, the content of the studied elements exceeded the so-called “natural levels”. The 1998 content of As, Cd, and Tl in the plants was due to the settling of dust containing industrial pollutants and reached 77–96%. After 20 years, the contribution of this source of pollution was considerably lower, reaching 63–79%. The performed analyses demonstrated the following mean contents of the analyzed elements in dust: 243 mg As/kg, 1113 mg Cd/kg, and 44 mg Tl/kg, which confirms the hypothesis on the major role of dust in the current soil and plant pollution. In all the habitats analyzed, a significant decrease of the transfer factor (TF) was found for As and Cd in 2018, compared to 1998. For Tl, a different observation was made. In three out of four analyzed habitats, TF decreased over the two decades studied, whereas in the remaining habitat, TF was higher in 2018 than in 1998 both for the grasses and for the birch leaves. Over the past 20 years, the most polluted area changed as well, from the land located closest to the zinc works, in the direction aligned with the most common winds, to the areas subject to the most intense settling of pollutants carried by the wind from unsecured heaps and industrial waste storage areas.
Źródło:: Journal of Ecological Engineering; 2019, 20, 7; 61-69
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Effect of Heavy Metals (Cu and Zn) on the Content of Photosynthetic Pigments in the Cells of Algae Chlorella vulgaris
Autorzy:: Kondzior, P.
Butarewicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/124303.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: heavy metals
photosynthetic pigments
copper
zinc
algae
Chlorella vulgaris
Opis:: The purpose of this paper is to determine the effect of heavy metals on the photosynthetic pigments of chlorophyll a, b and the carotenoids found in the cells of algae Chlorella vulgaris. In order to analyze the influence of heavy metals on Chlorella vulgaris algae, two heavy metals were chosen, i.e. copper and zinc. The samples for analysis were collected daily for 7 days. Copper(II) sulphate, which is widely regarded as an algicide, was used in the study. Chlorella vulgaris grows at the highest concentration tested, amounting to 0.15 mg CuSO₄/dm³. In the trial with a concentration of 0.15 mg CuSO₄/dm³, a decrease in the content of chlorophyll was observed, which was lower by 63% in comparison to the control sample, 7 days after incubation was observed. In the second study using zinc(II) sulphate at a concentration of 100 mg ZnSO₄/dm³, the death of Chlorella vulgaris was observed after 5 days of incubation. In subsequent tests with lower concentrations of zinc(II) sulphate, Chlorella vulgaris is growing, but with lesser dynamics than in the case of the control sample. The increase in the content of photosynthetic pigments, along with the incubation time, indicates the development of algae breeding. The conducted research shows that the Chlorella vulgaris algae has a specific resistance to the presence of the elevated content of tested heavy metals in the breeding medium.
Źródło:: Journal of Ecological Engineering; 2018, 19, 3; 18-28
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Effective Removal of Iron (II) from Aqueous Solution by Adsorption using Zn/Cr Layered Double Hydroxides Intercalated with Keggin Ion
Autorzy:: Oktriyanti, Melantina
Palapa, Neza Rahayu
Mohadi, Risfidian
Lesbani, Aldes
Powiązania:: https://bibliotekanauki.pl/articles/125462.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: adsorption
iron(II)
desorption
zinc
chromium
layered double hydroxide
Opis:: Zn/Cr and Zn/Cr layered double hydroxides (LDHs) intercalated with Keggin ion [α-SiW₁₂O₄₀]^4-were successfully synthesized at room temperature and pH value of 10. The synthesized materials were characterized by means of the XRD, BET, and FT-IR analyses and used as an adsorbent iron(II). The adsorption process was investigated by studying pH, the kinetics, and thermodynamic properties of the adsorption process. The results showed the interlayer Zn/Cr LDHs was 7.53 Å and increase to 10.26 Å on Zn/Cr LDHs intercalated with Keggin ion [α-SiW₁₂O₄₀]^4-. The BET analysis showed that the pore volume of both materials increased from 0.063 cm³ g^-1 to 0.163 cm³ g^-1. The pH point zero charge measurement for the Zn/Cr LDHs material was 10 while LDHs Zn/Cr intercalated with Keggin ion [α-SiW₁₂O₄₀]^4- was 8. Zn/Cr LDHs intercalated with Keggin ion [α-SiW₁₂O₄₀]^4- has higher adsorption capacity than Zn/Cr LDHs without intercalation. Desorption of iron (III) was successfully conducted using HCl as reagent showing the involvement of ion exchange in the adsorption.
Źródło:: Journal of Ecological Engineering; 2020, 21, 5; 63-71
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Soil Bioavailability of Cadmium, Lead, and Zinc in the Areas of Zn-Pb Ore Mining and Processing (Bukowno, Olkusz)
Autorzy:: Kicińska, Alicja
Smreczak, Bożena
Jadczyszyn, Jan
Powiązania:: https://bibliotekanauki.pl/articles/123776.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: zinc
lead
cadmium
bioavailability
bioaccessibility
soil
Agrostis capillaris
Bukowno
Opis:: The study was performed to determine the bioavailable amounts of cadmium, lead, and zinc in the soils contaminated over the years of Zn-Pb ore mining and processing near Olkusz, Poland, and to identify the environmental risk (RAC) associated with the occurrence of the most mobile forms of these metals in the soil. The authors analyzed the topsoil samples for the basic physical and chemical parameters, as well as for total metal content (by aqua regia extraction), and for percentage of 1 M HCl^- and 1 M NH₄NO₃ – extractable fractions. The results were compared with the content of these metals in a common grass species, Agrostis capillaris. In the study region, the Cd, Pb, and Zn contents were (respectively, in mg∙kg^-1): 0.5–33.5, 2–529, and 4–7877. This means that in more than 24%, 30%, and 38% of samples, respectively, the metal content exceeded the limits defined by the Polish Environment Minister’s Regulation of September 9, 2002, with nearly 24% of soil samples contaminated by all three metals. On the basis of the Environment Minister’s Regulation of September 1, 2016, which is currently in force, and using the allowed limits for subgroup IV (industrial land), set at 15 mg∙kg^-1 for Cd, 600 mg∙kg^-1 for Pb, and 2000 mg∙kg^-1 for Zn, the analysis also found the excessive metal content in a considerable percentage of the topsoil samples (33%, 13%, and 38%, respectively). The content of the studied elements in a common grass species, Agrostis capillaris, was significantly higher than the so-called natural content. A strict association was found between the total Cd, Pb, and Zn content, and the potentially available 1 M HCl – extractable fraction. The environmental risk presented by the content of mobile Cd, Pb, and Zn forms, assessed in all the studied soil samples using Risk Assessment Codes (RAC), demonstrates very high environmental risk associated with Cd, high environmental risk connected with Zn, and moderate environmental risk related to Pb.
Źródło:: Journal of Ecological Engineering; 2019, 20, 1; 84-92
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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