Feb 10, 2018 · The priority of this study was to investigate how selenium influences toxicity of Cd, Zn, Cu and Pb when the metals appear in the hydroponic solution in pairs. As a model subject mustard seedlings (Sinapis alba L.) were used. Except phytotoxicity of individual metals and Se-metal combinations determined through photosynthetic pigments content (chlorophyll a, b, …
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Feb 6, 2024 · The Pulang super-large porphyry Cu polymetallic deposit, located in the Sanjiang area of Yunnan Province, is one of the largest Cu deposits in China. This deposit hosts Cu resources of ~5 × 106 t and other ore-forming elements, such as Mo, Au, Ag, Pb, Zn, Pt and Pd. Recently, obvious hydrothermal vein-type Pb–Zn mineralization, with a Pb + Zn resource of …
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Nov 1, 2021 · In this study, the immobilization performance and mechanisms of heavy metals (HMs) in swine manure (SM) during anaerobic digestion (AD) with biochar (BC) and KH 2 PO 4-modified biochar (BP) were investigated.BC and BP addition decreased DTPA-extractable Cr, Cu, Pb and Zn amount, transformed these HMs to more stable state, and decreased the ecological …
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Aug 20, 2018 · The adsorption of metals onto Fe oxides, hydroxides and oxyhydroxides (hereafter denoted as Fe oxides for simplicity) is an important process that can influence metal mobility and bioavailability in soils and aqueous environments, and which has been studied for more than forty years (Raogadde and Laitinen 1974).Due to the development of advanced analytical …
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Sep 13, 2021 · The Ayawilca deposit in Pasco, Peru, represents the most significant recent base-metal discovery in the central Andes and one of the largest undeveloped In resources globally. As of 2018, it hosts an 11.7 Mt indicated resource grading 6.9% Zn, 0.16% Pb, 15 g/t Ag, and 84 g/t In, an additional 45.0 Mt inferred resource grading 5.6% Zn, 0.23% Pb, 17 g/t Ag, and 67 g/t …
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Oct 8, 2014 · Sungai Puloh mangrove estuary supports a large diversity of macrobenthic organisms and provides social benefits to the local community. Recently, it became a major recipient of heavy metals originating from industries in the hinterland as a result of industrialization and urbanization. This study was conducted to evaluate mobility and pollution status of heavy …
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Oct 1, 2023 · The Mississippi Valley-type (MVT) deposits found on all continents are among the most essential Pb-Zn deposits in the world (Leach et al., 2005, Leach and Bradley, 2010, Sośnicka and Lüders, 2019).The geological and geochemical characteristics of MVT deposits, the source and mobilization of metal elements, the migration and precipitation mechanism, the …
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Nov 1, 2023 · Sph-I is formed by a self-organized mechanism, and Sph-II and Sph-III are caused by CDR reactions with the influx of Cu-elevated fluids. • Sphalerite precipitated at the temperature of 254–346 °C with logfS 2 values of −11.77 to −8.26.. Jingchong Cu–Co–Pb–Zn mineralization formed in a magmatic-hydrothermal system at ca. 121 Ma.
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Jun 15, 2015 · Stock solutions of Pb, Zn, Cu, Cd and Cr were prepared using Pb(NO 3) 2, Zn(NO 3) 2 ·6H 2 O, Cu(NO 3) 2 ·5H 2 O, Cd(NO 3) 2 ·4H 2 O, and Cr(NO 3) 3 ·9H 2 O, respectively. The initial pH of the test solutions was adjusted to the desired value by using dilute solutions of 0.1 M NaOH and 0.1 M HNO 3. Heavy metal analyses were made using a ...
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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