Jan 1, 2012 · They found that Cd, Cu, Pb and Zn removal were quite dependent on biosurfactant concentration in the range of 0–10%. Removals for these metals were as high as 85%, 50%, 50% and 80% as much. In the other hand, the higher the pH value of the surfactant solution, the lower the metal removal. For some metals, pH values above 6.5 obtained minimum ...
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Jan 15, 2008 · The adsorption of Cd(II), Cu(II), Ni(II), Zn(II) and Pb(II) onto kaolinite suspensions was investigated using batch adsorption experiments and results suggested that in the lower pH range the metallic cations were bound through non-specific ion exchange reactions on the permanently charged basal surface sites (X ...
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Jan 20, 2024 · The elements of P, Cd, Cu, Pb, Se and Zn were further investigated. Cu, Cd, Pb and Zn are frequently studied metals (Goodyear and McNeill 1999), as elevated levels might be toxic to organisms. Zn and Cu are essential trace metals; whereas, Cd and Pb are in general considered non-essential (e.g. Rainbow 2002; Hejna et al. 2018). P is an ...
Separation of Sn, Sb, Bi, As, Cu, Pb and Zn from Hydrochloric Acid Solution by Solvent Extraction Process Using TBP as an Extractant 2229. 3.2 Effect of chloride concentration To investigate the influence of chloride concentration on extraction of metal ions, sodium chloride of 0.1–2.0mol/L was added in the aqueous phase and tested with 0 ...
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Jan 1, 2008 · Cu and Zn (Hartley et al., 2004). Warren et al., 2003, Warren and Alloway, 2003 observed increased plant uptake of other contaminants including Cu, Zn and Pb in soil amended with Fe(II) sulfate and lime. The authors explained that there was an insufficient amount of lime added and suggested a ratio of lime/Fe oxide necessary for maintaining ...
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May 6, 2014 · The glutathione metabolism contains crucial antioxidant molecules to defend the organisms against oxidants. Thus, the aim of this study was to investigate the response of the glutathione metabolism in the liver of freshwater fish Oreochromis niloticus exposed to metals (Cu, Cd, Cr, Pb, Zn) in different periods. Fish were exposed to metals (as 1 μg/mL) individually for …
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Mar 30, 2024 · The present study aims to obtain further knowledge on anthropogenically induced HM pollution (Cu, Fe, Pb, Zn) and the metabolic responses of the symbiont-bearing coral reef LBF Heterostegina depressa d'Orbigny 1826, since HM enrichment in coral reefs increased in the last decades. For that purpose we will test two different concentrations of HM.
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Apr 24, 2001 · The paper point out that the carbonate Carbonate Replacement Deposits (CRDs) are epigenetic, intrusion-related, high-temperature sulfide-dominant Pb-Zn-Ag-Cu-Au-rich deposits that typically form lenses or elongate to elongate-tabular bodies referred to as mantos or chimneys. Recent studies have shown that CRDs do occur in predictable geologic …
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May 1, 2008 · The second mineralization stage is partly superimposed on the first and consists of zoned east-west–trending Cu-Ag-(Au-Zn-Pb) enargite-pyrite veins hosted in the diatreme breccia in the western part of the deposit and well-zoned Zn-Pb-(Bi-Ag-Cu) carbonate-replacement orebodies; in both cases, sphalerite is Fe poor and the inner parts of the ...
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Dec 1, 2023 · The Dongshengmiao deposit in the Langshan district is a large Zn-Pb-Cu deposit with reserves of 4.83 Mt Zn at an average grade of 2.85 % Zn, 0.96 Mt Pb at 0.67 % Pb, and 0.11 Mt Cu at 0.86 % Cu (Long, 2009).As the third largest Pb-Zn deposit in China, its genesis has been actively debated since its discovery (Wang et al., 2014).Two main hypotheses currently exist: …
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