2014
DOI: 10.1016/j.apgeochem.2014.06.007
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Sequestration of Cd(II) and Ni(II) ions on fungal manganese oxides associated with Mn(II) oxidase activity

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Cited by 20 publications
(12 citation statements)
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“…In other words, natural Mn oxides formed in Reocín incorporated higher amounts of trace metals (the case of Zn is outstanding) despite being precipitated from solutions with much lower metallic content. This represents more evidence of the extraordinary capacity of natural Mn oxides (likely, bio-oxides) to scavenge trace metals in the environment, which is in accordance with previous work [3,[8][9][10]43,44]. for Ni, and around 3 mg/L vs. 231-624 mg/L for Zn; Table 1).…”
Section: Trace Metal (Co Ni Zn) Partition Between Parent Solutions supporting
confidence: 92%
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“…In other words, natural Mn oxides formed in Reocín incorporated higher amounts of trace metals (the case of Zn is outstanding) despite being precipitated from solutions with much lower metallic content. This represents more evidence of the extraordinary capacity of natural Mn oxides (likely, bio-oxides) to scavenge trace metals in the environment, which is in accordance with previous work [3,[8][9][10]43,44]. for Ni, and around 3 mg/L vs. 231-624 mg/L for Zn; Table 1).…”
Section: Trace Metal (Co Ni Zn) Partition Between Parent Solutions supporting
confidence: 92%
“…However, pH conditions of the IPB mine effluents a priori appear incompatible with the presence of Mn(II)-oxidizing microorganisms. This is an important limitation since Mn bio-oxides show adsorptive capacities, which are orders of magnitude higher than those of their abiotic counterparts [2,3,[8][9][10]45]. In the case of the circumneutral Reocín mine pit lake, geochemical conditions would a priori allow the presence of Mn(II)-oxidizing microorganisms that could be greatly catalyzing manganese oxidation.…”
Section: Factors Controlling Mn(ii) Oxidation and Mn Oxide Mineralogymentioning
confidence: 99%
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“…In contrast to very low oxidation efficiency, the cumulative C T seq concentration was high at 1.18 mM (0.43 ± 0.01, 0.46 ± 0.01, and 0.14 ± 0.00 mM for the 1st, 2nd, and 3rd treatments, respectively), corresponding to 83% ± 1% of the cumulative Cr III Int (Figure 7 and Table S2). The molar ratio of C T seq relative to solid Mn was abnormally high (~120 mol%), implying a sequestration mechanism specific to Cr other than the simple sorption process of common divalent heavy metal ions, Zn 2+ and Cd 2+ (their maximum sorption relative to solid Mn was 20-25 mol%; [39,41]) or trivalent La 3+ ions (~30 mol% [45]). Heated BMOs possessed similar Cr sequestration capacity ( Figure S3) even under aerobic conditions with the domination of Cr(III) in the solid phase, which was revealed by X-ray Absorption Near-Edge Structure (XANES) (Figure 8).…”
Section: Anaerobic Sequestration Of Cr(iii) By Bmosmentioning
confidence: 99%