The objective of this work was to determine the retention of five metals on pine bark using stirred flow and batch-type experiments. Resulting from batch-type kinetic experiments, adsorption was rapid, with no significant differences for the various contact times. ... Cu, Ni, Pb and Zn: batch-type and stirred flow chamber experiments J Environ ...
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Metal mining extraction and concentration need water. The recycling of liquid effluents reduces its consumption. This recycled water must contain low concentrations of metals. This project's first objective was to start up a laboratory-scale upflow anaerobic sludge blanket (UASB) reactor for biotransforming metal sulfates into metal sulfides of …
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Perillo et al. 51 reported the material balance and technical parameters during the start-up and normal operation of a Kivcet Pb smelter in Portovesme, Italy, and especially analyzed the distributions of Pb, Zn, Cu, and S. Fischer and Maczek 28 investigated the smelting process of a Pb concentrate with approximately 64.8 wt.% Pb …
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The concentration and speciation of Cu, Pb and Zn in soil samples collected around the lead–zinc smelting plant of Baoji, NW China, were determined using X-ray …
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The primary objectives were as follows: (1) to estimate the eficiency of HM removal with the tested WAs, (2) to examine the impact of WA flow rate on total HM removal and …
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However, with decreasing Zn content, the novel process become environmentally more competitive, and with 12% Zn, the corresponding GWP values were 6.31 and 9.26 kg CO 2 -eq. Co-product recovery ...
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Less Ca reported to the glassy slag when decreasing the cooling rate, and more Cu, Pb, Zn, Se, Te, and Ag entered the matte phase, but part of them were lost in the cooling process. Copper smelting slag is the largest solid waste produced in copper-making process, and slow cooling beneficiation technology is the most widely used …
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The quest for new, promising and indigenous plant growth-promoting rhizobacteria and a deeper understanding of their relationship with plants are important considerations in the improvement of phytoremediation. This study focuses on the screening of plant beneficial Cu/Zn-resistant strains and asses …
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Analysis was carried out of Cr, Cu, Ni, Pb and Zn in irrigation water, grape juice and wine, Cu, Pb and Zn in soil (pseudo-total and acid-soluble fractions) and Vitis vinifera L. in leaves and grapes.
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A method for extracting metals from solid samples was developed. The system had four flow channels (each containing a column packed with a solid sample), a single-flow peristaltic pump, and eight six-port valves. An extractant was passed into each channel for a specified period, then the valves were closed. We evaluated the system by …
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In the main stage Cu-Pb-Zn mineralization, Cu was precipitated prior to Pb and Zn. The Cu mineralization in the mylonites is dominated by stockworks while breccia mineralization is common in Pb-Zn ores and the fragments are cemented by sphalerite, galena, and pyrrhotite (Zhong et al., 2012). Ore fabrics and mineral assemblages of Cu …
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Available reports show that saponin molecules can form complexes with Cu, Pb and Zn in aqueous solutions ... conditions of process parameters for Pb and Cu removal using shikakai were: (Conc. 3.3% ...
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IX offers an effective method for the recovery of these metals from a leachate. This study presents the pH performance of six selected IX resins in extracting Cu 2+, Fe 2+, Pb 2+ and Zn 2+ from acetic, lactic and citric acid media simulated weak acid leachate. Acetic acid media displayed limited suppression of metal extraction, whilst lactic ...
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At both flow rates, k values for Cu and Zn removal, but not Pb removal, were ca. twofold higher with Na 2 EDTA than with SS_WAs. Of the tested SS_WAs, DOM removed Cu …
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The obtained results show that the maximum values of Cu (793.52 μg·g −1), Zn (72.09 μg·g −1), Pb (222.19 μg·g −1), and Cd (1.60 μg·g −1) were collected from the …
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Metal concentrations (Cu, Cd, Zn, and Pb) in macrophyte root could be predicted using DGT more effectively and accurately than other methods (viz. the total concentrations in the pore water or ...
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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 ...
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Metal pollution in urban soils due to smelting and electroplating has become a severe problem in China. In this study, the concentration, chemical fraction, and leaching behavior of typical metals (Cu, Zn, Cd, and Pb) in soil samples from ten metallurgical sites were studied. The results show that some of the soils were polluted with Cu and most …
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trate is produced [5]. The prevailing process in the Cu–Pb– Zn ores processing on industrial scale is copper–lead bulk flotation with depression of zinc and then zinc flotation from tails. About 90% of the operational plants use this method. The copper and lead separation from bulk con-centrate is usually carried out in two ways ...
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The main objectives of this study were: (1) to determine the concentration and spatial variation of Cu, Pb and Zn in soil around the lead–zinc smelting plant of Baoji; (2) to …
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Request PDF | Ion exchange removal of Cu(II), Fe(II), Pb(II) and Zn(II) from acid extracted sewage sludge – Resin screening in weak acid media | A shortage of phosphate rock resources has led to ...
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Cu, Zn, Cd, and Pb ions could be directly adsorbed to the deprotonated functional group or complexed by substituting protons from the functional group (Lu et al., …
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This paper presents the first tests of Cu (7875 mg/kg), Pb (1414 mg/kg) and Zn (566 mg/kg) removal from contaminated soil with sewage-sludge–derived washing agents (SS_WAs) (dissolved organic matter, DOM; soluble humic-like substances, HLS; soluble humic substances, SHS) and Na 2 EDTA (as a standard benchmark) in column experiments. …
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The transfer-uptake-bioavailability of phosphorus (P), Cu, Cd, Zn, and Pb in rhizosphere of Zizania latifolia (ZL) and Myriophyllum verticiilaturn (MV) cultivated in rhizoboxes in Lake Erhai (China) is evaluated by DGT (diffusive gradients in thin films) technique. DGT induced fluxes in sediments (DIFS) model reveals that resupply ability …
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A pre-enrichment process of sulfides is therefore deemed necessary for the formation of orogenic base metal deposits, such as the Bainaimiao Cu-Au-Mo deposit, the Huogeqi Cu-Pb-Zn and the ...
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The chemical composition within the 2 nd-neighbor local zone is then Zn + Cu 9.4 Zn 2.6 + Cu 3.5 Zn 2.5 = Cu 12.9 Zn 6.1, or Cu 67.9 Zn 32.1 in at.%, which is close to that of the alloy, Cu 68.9 ...
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In the present study, the occurrence and the fate of eight heavy metals (Cd, Pb, Mn, Cu, Zn, Cr, Fe and Ni) during the wastewater treatment process were investigated. The study was conducted in the WTP of the city of Thessaloniki, northern Greece operating in the activated sludge mode. The mass balances of individual metals …
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The results of latter process showed that 1-2% Pb, 16-17% Cu and 21-24% Zn was removed by surfactin after 48h, whereas the removal of Pb, Cu and Zn was increased from 40% to 47%, 30% to 36% and 16% to 18% in presence of saponin with an increase from 24 to 72h at room temperature by the soil washing process at pH 4.
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A feasible flowsheet was developed based on a modified Black Mountain (Cu-Pb-Zn concentrator) processing route for the Cu circuit. •. The existing RPZC route …
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T D ACCEPTED MANUSCRIPT 1 1 Ion Exchange Removal of Cu(II), Fe(II), Pb(II) and Zn(II) from 2 Acid Extracted Sewage Sludge – Resin screening in weak acid 3 media 4 James P. Bezzina1, Laura R. Ruder1, Robert Dawson2, Mark D. Ogden1 5 1Separation and Nuclear Chemical Engineering Research (SNUCER), Department of Chemical and 6 …
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The homogenous soil was then spiked with a mixture of Cu, Pb and Zn. For spiking, nitrate salts of HMs i.e. Cu(NO 3) 2, Pb(NO 3) 2 and Zn(NO 3) 2 (Sigma-Aldrich) were used. The salts were ...
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Hence the Tiemurt Pb-Zn-Cu deposit provides an opportunity to investigate the Pb-Zn-Cu accumulation from the primary VMS to later deformation-metamorphism processes. In this paper, we present new data on field geology and a comprehensive study of ore textures, paragenesis, systematic isotope (S-Pb-C-D-O) geochemistry, and LA …
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This study considered NB flotation for processing complex Pb-Cu-Zn sulfide ore in two different size ranges and various conditions to assess the process readiness. Metallurgical NB flotation ...
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The combined depressants of "K2Cr2O4+CMC+ Z-200" was used to treat a lead-zinc concentrate from Nanjing dy restraining lead to get copper[16]. As the bulk concentrate contained 50.8% Pb and 3. ...
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Phosphorus-bearing materials have been widely applied in immobilization of heavy metals in contaminated soils. However, the study on the stability of the initially P-induced immobilized metals in the contaminated soils is far limited. This work was conducted to evaluate the mobility of Pb, Cu, and Zn in two contrasting contaminated …
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From the Middle Ages until the beginning of the twentieth century, extensive Zn–Pb mining and smelting was carried out in East-Belgium. By lack of waste treatment techniques and sustainable management practices, metal-bearing slags and unprocessed waste were dumped in huge tailings, which still represent an important source of …
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Abstract. This paper presents the first tests of Cu (7875 mg/kg), Pb (1414 mg/kg) and Zn (566 mg/kg) removal from contaminated soil with sewage-sludge–derived …
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The removal efficiencies of Pb, Cu and Zn were increased significantly from 57% to 98%, 85% to 95% and 55% to 56% with an increase in the flow rate from 0.2 to 1.0 L min −1 at 0.15 g L −1 saponin (pH 4 and 30 °C). The present investigation indicated that the fractionation process is more efficient for the removal of heavy metal from ...
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The flowsheet achieves ∼65% Cu recovery at a concentrate grade of 26% Cu, 3.5% Pb, 3% Zn and 300 g/t Ag according to the following procedure: (1) Aeration of …
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