Remediation of percolate water from uranium tailings reservoir by coupling iron-carbon micro-electrolysis and sulfate reducing bacteria

被引：0
作者：
Hu N. [1 ,2 ]
Tao D. [1 ,2 ]
Yang Z. [1 ]
Wang X. [1 ]
Zhang X. [1 ]
Liu Y. [3 ]
Ding D. [1 ,2 ]
机构：
[1] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hunan, Hengyang
[2] Hunan Province Key Laboratory of Green Development Technology for Extremely Low Grade Uranium Resources, University of South China, Hunan, Hengyang
[3] China General Nuclear Power Group (CGN) Uranium Resources Co., Ltd., Beijing
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 06期
关键词：
anaerobic; micro-electrolysis; reduction; remediation; sulfate reducing bacteria; uranium;
D O I：
10.11949/0438-1157.20230147
中图分类号：
学科分类号：
摘要：
Six reactors, including iron-carbon micro-electrolysis coupling with sulfate reducing bacteria (Fe/C-SRB), aluminum-carbon micro-electrolysis coupling with sulfate reducing bacteria (Al/C-SRB), carbon coupling with sulfate reducing bacteria (C-SRB), iron-carbon micro-electrolysis (Fe/C), aluminum-carbon micro-electrolysis (Al/C) and carbon (C), were designed to investigate their effects on the remediation of U, Mn, Zn, SO24- and NO-3 in the percolate water from the uranium tailings reservoir. The results indicated that the concentration of U in the effluent of Fe/C-SRB reactor system decreased to 0.05 mg/L after 2.5 h. The concentration of Mn decreased to 10 mg/L and the concentration of Zn decreased to 0.05 mg/L after 1 d. The concentration of SO24- decreased to 50 mg/L after 10 d, and the concentration of NO-3 decreased to 10 mg/L after 18 d, all of which satisfied with the relevant national emission standards, and operated stably. The treatment efficiency of Fe/C-SRB reactor was significantly higher than that of other reactors. The total abundance of microbial communities including Desulfotomaculum, Desulfovibrio, and Desulfosporosinus with the function of reducing U(Ⅵ) in the filler of the Fe/C-SRB reactor system reached 61.45%, which was 40.35%, 60.06%, 57.22%, 59.73% and 52.46% higher than that of Al/C-SRB, C-SRB, Al/C, Fe/C and C reactor systems at 60 d, respectively. The 33.20% of U(Ⅵ) in the leachate was reduced to U(Ⅳ) by microorganisms and iron. The study demonstrates that Fe/C-SRB is a promising method for remediating percolation water from uranium tailings reservoir. © 2023 Chemical Industry Press. All rights reserved.
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页码：2655 / 2667
页数：12
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