A bulk liquid membrane system has been developed and applied to the simultaneous separation and preconcentration of up to seven heavy metals (copper, zinc, lead, cadmium, aluminium, manganese, and nickel) in seawater. Copper was selected to optimize transport conditions and then, under these conditions, the simultaneous extraction of other …
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It is widely recognized that the overuse of fertilizers and pesticides contributes to heavy metal contamination in the soil. Indeed, fertilizers may contain traces of heavy metals such as Cd, Cu, Zn, Pb, or As (Hou et al., 2020; Lu et al., 2012; Nziguheba and Smolders, 2008).These elements are frequently incorporated into micronutrient fertilizers or as components of …
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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 Biological Engineering, …
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The spatial distributions of Cr, Ni, Cu, Zn, As, Cd and Pb (potentially toxic elements, PTEs) in sediments and intrinsic influence factors from the Wuliangsuhai wetland of the Hetao Irrigation District, China were studied in this work. The results showed that excluding Zn, the total contents of other PTEs were higher than the background values, of which As (39.26 …
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Sphalerite and pyrrhotite grains from the Luotuoshan Zn-Cu-W deposit and quartz from the Lengshuibeigou Pb-Zn-Ag deposit display Rb-Sr isochron ages of 139.6 ± 2.3 Ma and 40 Ar/ 39 Ar plateau age of 137.9 ± 0.4 Ma, respectively (Wang et al., 2013, Xing et al., 2016). Were these distal mineralizations genetically related to the magmatism at ...
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UNMIX model has a strict data screening process based on an eigenvalue analysis. The missing data or data below minimum detection limits will be eliminated. ... Thus, Pb-Zn-Cu isotopic compositions gave further confirmation that irrigated river sediments and TSP were the primary anthropogenic source for heavy metal accumulation in soils. 4 ...
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The Pb isotopic composition of the sulfides from the Qiandongshan–Dongtangzi Pb-Zn deposit (with 206 Pb/ 204 Pb ratios of 18.06 to 18.14, the 207 Pb/ 204 Pb ratios of 15.61 to 15.71, and 208 Pb/ 204 Pb ratios of 38.15 to 38.50) is similar …
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As, Cd, Cu, Ni, Sb, Pb, and Zn in digested soil or plant samples were then analyzed in ICP-AES (inductively coupled plasma–atomic emission spectrometry; Ultima2 JY, Horiba Company, Edison, NJ,
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The pollution status of ten potentially toxic elements (PTEs), isotopic compositions (Cu, Zn, Pb), and the potential ecological risk posed by them were investigated in the PM10 fraction of road dust in Busan Metropolitan city, South Korea. Enrichment factors revealed extremely to strongly polluted levels of Sb, Cd, Zn, Pb, and Cu in the PM10 fraction of road …
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The Tiemurt Pb-Zn-Cu deposit is situated in the southern margin of the Chinese Altay Orogen (Fig. 2). It was first discovered in 1987 with contained metals of 0.29 Mt Pb + Zn and 0.14 Mt Cu (Wan et al., 2010a).
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Strain S44, identified as Acinetobacter sp. FQ-44 based on 16S rDNA sequencing, was specifically chosen as the most favorable strain owing to its strong capabilities to (1) promote the growth of ...
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The Chah-Mesi epithermal Cu-Pb-Zn-(Ag-Au) deposit and its link to the Meiduk porphyry copper deposit, SE Iran: Evidence from sulfosalt chemistry and fluid inclusions ... 2018) and Biksizak, both in Russia (Plotinskaya et al., 2015). However, complex zoning has also been documented in non-magmatic hydrothermal ore deposits, such as in the ...
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The F2 fraction of Cd, Pb, Cu, and Zn decreased when applying BM, OS, and BO, which might promote the conversion of the combined form of heavy metals with Fe/Mn and CO 3 2-/HCO 3-to the form of hydroxide. It was observed that the F2 fraction of Cd decreased by 35% at OS 3% treatment, which might be due to the high pH of OS.
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The analysis of Cd, Cu, Pb, and Zn were performed by ICP-OES (Varian, 710-ES) in μg/kg. To control the accuracy of the experiment, a multi-element standard solution (Merck) with different concentrations of Cd, Cu, Pb and Zn (0.2, 1, 10, 50, 100 and …
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Pb and Cu were sorbed and retained to a greater extent than Cd, Ni or Zn, which had low K d100 values. Pb was sorbed more than any other metal. Cr was generally sorbed only slightly more than Cd, Ni or Zn, but was strongly retained, with K d100 (retention) values greater than those of Pb and Cu in soils with very low CEC (<3 cmol (+) kg −1 ...
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El Hachimi et al. reported the same trend of heavy metal contents in some Pb and Zn mining site in High Moulouya from Morocco, 5547 mg Pb kg −1 and 7500 mg Zn kg −1 at Zaida mine, 10,520 and 9075 mg kg −1 of Pb and Zn, respectively, at Mibladen mine, and 2101 mg kg −1 of Pb and 3125 mg kg −1 of Zn at Aouli.
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Porphyry Cu deposits (Tomino and Mikheevskoe) formed within oceanic arc settings are featured by high contents of Re (mostly over 400 ppm) and low contents of W (<10 ppm) in …
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The contaminated soil was prepared according to twice the risk screening value in GB15618-2018 (Yu et al., 2019), the Soil Environmental Quality-Risk Control Standard for Soil Contamination of Agricultural Land (trial) (Cu:200 mg/kg, Pb:240 mg/kg, Zn: 500 mg/kg). It was aged for 90 days under natural conditions to prepared the heavy metal ...
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Cu and 800 mg L 1 Zn; (3) mobilize the highest concentrations of water-soluble Cu, Zn, Pb, and Fe (16.99, 0.98, 0.08, and 3.03 mgL 1, respectively); and (4) adsorb the greatest quantities of Cu and Zn (7.53 and 6.61 mgg 1 dry cell, respectively). Our findings suggest that Acinetobacter sp. FQ-44 could be exploited for bacteria-assisted ...
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The present study was carried out to describe the characteristic features of potentially toxic metals (PTMs) in the soil of industrial city, Kolchugino–Vladimir …
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El Hachimi et al. [43] reported the same trend of heavy metal contents in some Pb and Zn mining site in High Moulouya from Morocco, 5547 mg Pb kg−1 and 7500 mg Zn kg−1 at Zaida mine, 10,520 and 9075 mg kg−1 of Pb and Zn, respectively, at Mibladen mine, and 2101 mg kg−1 of Pb and 3125 mg kg−1 of Zn at Aouli.
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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 and citric acid media rendered MTS9100 ineffective.
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The total metal content in the soil in descending content order was Fe, Al, Cu, Mn, Zn, Cr, Pb, Ni, and Cd; this was similar to the topsoil layer (0–15 cm) in 15 urban solid waste landfills (over 20 years old) ... operating blood and urine screening of workers at the landfill, and exposure avoidance for children living near the contaminated ...
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Recently, heavy metal contaminated soil has been widespread concerned. Herein, rice straw-derived biochar-supported nanoscale zero-valent iron (nZVI@BC) composite was prepared and characterized, and its remediation performance in Cu, Zn, As, Cd, and Pb contaminated soil were evaluated. nZVI@BC demonstrated better immobilization effect on …
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The pollution of Urbic Technosols with Cr, Mn, Ni, Cu, Zn, As, Cd, and Pb is higher than in the semi-hydromorphic and hydromorphic soils of the coast of the Sea of Azov and the …
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The present study investigates Cu along with other metal (loids) such as As, Cd, Hg, Co, Mn, Pb and Zn in the soil collected from the vicinity of Cu smelter, Karabash, Russia, …
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The pH in the fine sand fraction of the USDS was investigated. The characterization of the samples of the fine sand fraction of the USDS were conducted using a slightly alkaline reaction (pH = 7.38). There are a lot of properties of the sediment that should be studied, such as the granulometry of mineral composition and, esp…
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The Tiemurt Pb-Zn-Cu deposit is situated in the southern margin of the Chinese Altay Orogen (Fig. 2).It was first discovered in 1987 with contained metals of 0.29 Mt Pb + Zn and 0.14 Mt Cu (Wan et al., 2010a).Some geological and geochemical characteristics of primary VMS mineralization are preserved at Tiemurt, but the major Pb-Zn-Cu mineralization is adjacent to …
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Fine dust from copper smelting plants is an important source of raw materials for the extraction of various valuable metals. A specific feature of dust from copper smelting plants in Kazakhstan is their high arsenic content of …
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The eastern Guizhou Pb–Zn metallogenic belt (EGMB) is an important source of Pb–Zn resources and other critical minerals (including dispersed metals, such as Ge, Cd and Ga) in China. In order to ensure the …
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Methods: The blood levels of lead (Pb), cadmium (Cd), mercury (Hg), selenium (Se), copper (Cu) and zinc (Zn) and the results of the cognitive function tests were extracted from 811 elderly ...
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The synthesized CaAl-layered double hydroxide (CaAl-LDH) shows excellent performance in potentially toxic metals (PTMs) removal, and the removal capacity of CaAl-LDH toward Cu 2+, Zn 2+ and Pb 2+ in aqueous solution is 502.4, 315.2 and 600.0 mg/g respectively. Cu 2+ and Zn 2+ are removed through isomorphic substitution of laminate Ca and dissolution …
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The pollution status of ten potentially toxic elements (PTEs), isotopic compositions (Cu, Zn, Pb), and the potential ecological risk posed by them were investigated in the PM10 fraction of road ...
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Pb, Cd, Hg, Se, Cu, and Zn were significantly associated with cognitive function. An interaction between Cd and the other heavy metals (excepted for Pb). Exposure to the 6 heavy metals combined showed a positive linear association with IRT, DRT and a …
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The changes in pH and HA values significantly affected the metal speciation. The metals are mainly present as divalent (Cd 2+, Cu 2+, Ni 2+, Pb 2+ and Zn 2+) or trivalent (Cr 3+) cations species at acidic pH conditions, while as metal-carbonate (for Cu, Pb, Ni and Cd) or metal-hydroxide complexes (for Zn and Cr) at alkaline pH conditions. At ...
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The isotopic composition correlations for Cu (p < 0.01, r = −0.48), Zn (p < 0.01, r = −0.71) and Pb (p < 0.01, −0.78) concentrations were all negative and the δ 65 Cu, δ 66 Zn and 206 Pb/ 207 Pb became lighter as the concentration increased (Fig. 3 and Table 4). The sampling site close to the terrestrial regions had higher metal ...
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Many elements (Mn, Ni, Cu, Cd, Pb, As, and Sb) exhibited a prominent local maximum (a factor of 2–3) in the zone of intensive oil and gas extraction (61–62° N latitudinal belt), which can be linked to gas flaring and fly …
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In 2011, zinc (Zn) was proposed as a potential bioresorbable metals for BRS applications with reasonable biocompatibility and an appropriate biodegradation rate between Fe and Mg [13].However, the development and characterization of Zn and its alloys as bioresorbable metals is an ongoing research and rigorous studies must be performed in order to determine …
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Here we report Cd, Cu, Pb and Zn concentrations (dissolved and particulate) from a survey of major Eurasian arctic rivers conducted in the summer of 1998.
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