Temat: Copper - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Study of Copper Alloy with Graphene Additive via x-Ray Diffraction
Autorzy:: Masri, Mohamad Najmi
Mohammad, M.
Yusoff, Mahani
Mamat, Sarizam
Teo, Pao Ter
Othman, R.
Irfan, Abd Rahim
Singh, Pramod K.
Powiązania:: https://bibliotekanauki.pl/articles/2134097.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: copper alloy
graphene
powder metallurgy
copper
zinc
Opis:: This study evaluated the effect of milling speed and compaction pressure on the densification and morphology of the CuZn-Gr composite. The composite was prepared by using the powder metallurgy technique. The effect on the microstructural and compaction was determined based on different milling speeds. The different milling speeds involved were 175, 200, 225, and 250 rpm. Meanwhile, the different compaction pressures used in this study were 127, 250, 374, and 500 MPa. The properties of the milled powder gave the result to green density and densification parameters. The XRD pattern of Cu and Zn broadened as milling time increased.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 3; 1051--1053
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of the Głogów copper works on the content of mobile forms of copper and zinc in arable soils
Wpływ Huty Miedzi Głogów na zawartość mobilnych form miedzi i cynku w okolicznych glebach uprawnych
Autorzy:: Jaworska, H.
Dabkowska-Naskret, H.
Powiązania:: https://bibliotekanauki.pl/articles/1188028.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: soils
copper
zinc
Opis:: Celem badań była ocena wpływu Huty Miedzi Głogów na profilową dystrybucję oraz mobilność miedzi i cynku w okolicznych glebach uprawnych. Materiał badawczy stanowiły profile glebowe położone w odległości 5,7-6,8 km w kierunku południowo-wschodnim od emitora. W próbkach glebowych pochodzących z 4 profili gleb uprawnych sklasyfikowanych jako gleby płowe typowe oznaczono: uziarnienie, pH KCl (1 mol dm- 3 ) i pH w H2O, C-organiczny oraz całkowitą zawartość Cu i Zn metodą ASA po mineralizacji w kwasach HF i HClO4, a zawartość form mobilnych Cu i Zn metodą analizy sekwencyjnej. Pod względem uziarnienia badane profile zaliczono do pyłów gliniastych. W badanych glebach pH było w zakresie pHH o 7,33-8,55 oraz pHKCl 5,81-7,75, przyjmując najniższe wartości w poziomach Bt. Stwierdzono obecność węglanu wapnia, oprcz profilu (P1), którego zawartość wynosiła 0,43%-11,60%. Najzasobniejsze w CaCOg były poziomy C oraz poziomy Bt. Zawartość C-organicznego w poziomach próchnicznych wynosiła 7,0-18,1 g kg- 1 , całkowita zawartość Cu 4,04-57,75 mg kg- 1 . Stwierdzono wyraźnie wyższą całkowitą zawartość Cu w poziomach Ap oraz najniższą w poziomach C, co wskazuje na antropogeniczne wzbogacenie poziomów Ap w Cu. Wyniki analizy sekwencyjnej wskazują na dominujący udział w poziomach powierzchniowych frakcji V, tj. form związanych z materią organiczną, w pozostałych poziomach przeważa frakcja Cu związana z tlenkami żelaza. Całkowita zawartość Zn wynosiła 3,34-42,65 mg kg- 1 , a najwyższą zawartość tego pierwiastka stwierdzono w poziomach Ap, najniższą w poziomach Eet. Analiza specjacyjna wykazała najwiekszą zawartość Zn w formie związanej z krystalicznymi tlenkami żelaza (frakcja VI), a najniższą we frakcji I i II, tj. w formach wodnorozpuszczalnych i wymiennych. Badane gleby w większości (oprócz profilu P1) można zaklasyfikować do gleb niezanieczyszczonych Cu i Zn, co wskazuje, że bliskość Huty Głogów (oprócz jednego przypadku) nie eliminuje badanych gleb z użytkowania rolniczego.
Źródło:: Journal of Elementology; 2012, 17, 1; 57-66
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Evaluation of Zinc and Copper toxicity caused by ingestion of Turkish coins: an in vitro study
Autorzy:: Ates Alkan, F.
Kilinc, E.
Gulyasar, T.
Or, M.E.
Powiązania:: https://bibliotekanauki.pl/articles/1192066.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: Turkish coins
children
zinc
copper
toxicity
Opis:: Coins are foreign objects that are commonly ingested by children and pets due to their shiny appearance and bright colors. The current study investigated whether Turkish coins can lead to zinc (Zn) and copper (Cu) toxicity as a result of exposure to simulated gastric juice (i.e. hydrochloric acid solution simulating the gastric environment). Five groups of coins were exposed to simulated gastric juice (0.15 N, pH:1-2) for a period of 4 (Group 1), 12 (Group 2), 24 (Group 3), 48 (Group 4), 72 (Group 5) and 120 h (Group 5) at body temp. (37°C). Zinc and copper levels were determined in the gastric acid solution by using an inductively coupled plasma optical emission spectrophotometer (ICP-OES). The coins were also evaluated for corrosive damage and weight loss. Group 5 had statistically higher Cu and Zn levels versus the other groups. However, at body temp. (37°C), copper and zinc levels increased steadily in parallel to the duration for which the coin remained in the stomach after ingestion. After 120-hour exposure at 37°C, all coins had various types of damage compared to the baseline, such as color alteration, erosion, and visible surface cavities. The mechanisms relating to local and systemic copper and zinc toxicity caused by coin ingestion is yet to be clarified for both Turkish and international coins. Therefore, it can be foreseen that intervention is required in the first 24 h after ingesting 5 kuruş coins and, unless removed spontaneously in 48 h, such intervention is needed for the other coins.
Źródło:: Journal of Elementology; 2020, 25, 3; 961-971
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Application of biological method for removing selected heavy metals from sewage sludge
Autorzy:: Willner, Joanna
Fornalczyk, Agnieszka
Powiązania:: https://bibliotekanauki.pl/articles/109353.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: bioleaching
sewage sludge
copper
zinc
Acidithiobacillus
Opis:: The aim of the study was to evaluate the application of bioleaching technique to reduce content of selected heavy metals (Zn, Cu) in sewage sludge, and hence to indicate possibilities for metals recovery from this type of waste. Bioleaching experiments were carried out with mixed bacteria Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans, using leaching media: ferrous sulfate with different concentrations of Fe²⁺ (2 g/dm³ and 9 g/dm³) and sulfuric acid (VI). Dynamics of the increase in zinc concentration in biological systems was almost identical for both 9 g Fe²⁺/dm³ and 2 g Fe²⁺/dm³ in samples. However, higher values of Cu concentration were achieved using a medium with iron(II) salt 9 g/dm³ than in a 2 g/dm³ solution. Bioleaching with 9 g Fe²⁺/dm³ allowed for a nearly 20-fold reduction of zinc content and a 2-fold reduction in copper content in sewage sludge. Using 9 g/dm³ ferrous sulfate bioleaching could dissolve 94.8% Zn and 58.9%, whereas chemical leaching dissolved 47.3% Zn and 4.2% Cu.
Źródło:: Physicochemical Problems of Mineral Processing; 2020, 56, 2; 387-395
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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: 6.

Tytuł:: Beneficiation of Artvin-Cerattepe copper-zinc ore by flotation
Autorzy:: Seyrankaya, Abdullah
Yontar, Uğur
Canbazoğlu, Mehmet
Özel, Gizem
Kabaloğlu, Sinan
Powiązania:: https://bibliotekanauki.pl/articles/24148596.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: copper
zinc
flotation
collector
refractory ore
Opis:: The Cerattepe (Artvin) mine contains volcanogenic massive sulfide (VMS) deposits in northeastern Turkey. This is a kuroko type deposit located in Late Cretaceous volcanic, intrusive and sedimentary rocks, and has a structure with dense alteration stages. In this study, batch flotation tests were carried out to determine the flotation behavior of a new sample (mix ore), that was the combination of two different ores with different flotation behaviors. The mixed ore contains 2.18% Cu, 1.46% Zn, (Cu/Zn ratio 1.49) 38.35% Fe, and 41.6% S content. An efficient separation of copper minerals from zinc minerals using the conventional selective flotation method could not be achieved due to complex mineralogy and very low liberation degree. Therefore, sequential selective flotation resulted in poor Cu recovery. The effects of flotation parameters such as collector type, collector amount, particle size, and pH conditions, were investigated to obtain a bulk copper-zinc concentrate. The best results were obtained using thionocarbamate (Aero 3894) and dithiophosphine (Aerophine 3418A) collector reagents at d80=40 μm particle size. Under optimal conditions (grain size, d80=40 μm, pH=11, amount of collector reagent 60 g/t (Aero 3894), frother (MIBC)=50 g/t, solid ratio=32%, flotation time=8 min.), a bulk copper-zinc concentrate containing 13% Cu and 9.5% Zn was obtained with a copper yield of 84.4% and a zinc yield of 88.9%. The concentrate mass pull was 13%. After rougher and two-stage scavenger flotation, a concentrate (rougher concentrate + scavenger products) was obtained with a mass pull of 22%. Copper and zinc recoveries of this concentrate were 91.8% and 92.5%, respectively.
Źródło:: Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 167499
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The effect of cooper, zinc and selenium on skin condition
Autorzy:: Kulik, Anna
Powiązania:: https://bibliotekanauki.pl/articles/32879179.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:: copper
zinc
selenium
skin
skin health
physiology
Opis:: Trace elements are essential for the maintenance of the homeostasis of the body, and condition the proper functioning of the human organism. Micronutrients influence a number of metabolic processes in the dermis and epidermis. An excess or deficiency of trace elements may represent a potential threat to human health with implications for skin condition. This study reviews the literature on the effects of copper, zinc and selenium on skin condition.
Źródło:: Polish Hyperbaric Research; 2023, 2(83); 23-30
1734-7009
2084-0535
Pojawia się w:: Polish Hyperbaric Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: How copper excess influences homeostasis of the bank vole (Myodes glareolus)
Autorzy:: Miska-Schramm, A.
Zakrzewska, M.
Hajduk, J.
Kruczek, M.
Powiązania:: https://bibliotekanauki.pl/articles/1189831.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: copper
iron
zinc
bank vole
homeostasis
Opis:: Copper is a physiologically occurring trace element, the availability of which to wild small mammals is constantly increasing. This research deals with the questions of how copper in doses equivalent to those found in the natural environment from polluted areas (Cu I – 150 mg kg-1, Cu II – 600 mg kg-1) influences homeostasis of small rodents. The following were used as indicators: ratios of organs to body mass, blood parameters (haematocrit, haemoglobin), copper, iron and zinc concentrations in selected tissues and in excrements. The bank vole was used as a model species (n = 72). Haematocrit was assessed using a haematocrit reader, while haemoglobin was determined with a spectrophotometer. The content of Cu, Fe and Zn was analyzed using the flame method. Ratios of the liver and kidneys to body mass were significantly lower in animals exposed to 600 mg kg-1 Cu than in the control. Copper accumulated in the liver, kidneys, brain and excrements of the Cu II animals of both sexes. It also influenced the iron and zinc homeostasis by decreasing the iron concentration in the kidneys of both sexes, in the liver of females and in male testes. Additionally, it caused a decline in iron excretion in females. Compared to the control, the zinc concentration was significantly higher in the liver and brain of animals exposed to copper solutions as well as in the kidneys of copper treated males. Along with an increase in copper, the zinc concentration in faeces decreased significantly. In conclusion, copper pollution influences negatively the homeostasis of small mammals. Consequently it may interfere with trophic chains, which could affect adversely the degree of biodiversity.
Źródło:: Journal of Elementology; 2017, 22, 2; 617-628
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

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: 10.

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: 11.

Tytuł:: Effect of copper concentration on micropropagation and accumulation of some metals in the Dendrobium kingianum Bidwill orchid
Autorzy:: Prazak, R.
Molas, J.
Powiązania:: https://bibliotekanauki.pl/articles/14504.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: orchid
Dendrobium kingianum
copper concentration
micropropagation
metal accumulation
biometric feature
in vitro culture
calcium
zinc
iron
copper
Opis:: The study focused on the influence of an increased copper content in the Murashige and Skoog (1962) solid medium on the in vitro plant growth and development of Dendrobium kingianum Bidwill. Sterile explants of pseudobulbs were used for micropropagation of orchid plants on the MS regeneration medium supplemented with 0.5 mg dm-3 NAA and 1.0 mg dm-3 kinetin. Copper (as CuSO4 × 5H2O) was added to all the combinations in concentrations of 0.025 (control), 0.625, 1.25, 2.5 and 5.0 mg dm-3. The results showed that the treatments with 1.25 and 2.5 mg dm-3 stimulated the orchid growth and development in in vitro culture. After eight months of growing in in vitro culture, the highest number of shoots, the longest roots and the heaviest fresh weight of plantlets were obtained in these treatments. In medium with the highest copper concentration (5.0 mg dm-3), a negative influence of the metal on the length of roots and fresh weight of orchids was noted. Spectrophotometric analysis (ASA) showed that the copper and iron accumulation increased in both shoots and roots with the increase in the external Cu level, whereas the zinc and calcium accumulation in these organs decreased. The copper and zinc accumulation in the roots was about 1.5-2.5 times higher than in the shoots, but the iron accumulation was about 3-3.5 times higher. The calcium accumulation in roots was only 5-12% higher than in shoots.
Źródło:: Journal of Elementology; 2015, 20, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Comparison of the content of selected heavy metals in the liver tissue of the wild boar (Sus scrofa), red fox (Vulpes vulpes) and red deer (Cervus elaphus), living in north-eastern Poland
Autorzy:: Cebulska, K.
Sobiech, P.
Tobolski, D.
Wysocka, D.
Janiszewski, P.
Zalewski, D.
Gugołek, A.
Illek, J.
Powiązania:: https://bibliotekanauki.pl/articles/2087096.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: cadmium
copper
hepatic tissue
wild animals
selenium
zinc
Źródło:: Polish Journal of Veterinary Sciences; 2021, 24, 3; 425-432
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

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: 14.

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: 15.

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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