文献类型：期刊文献

英文题名：Bioremediation of Uranium (Vi) Contaminated Groundwater Under Woodchip-Sulfur(0) Mixotrophic Condition: Decontamination Performance and Microbial Interactions

作者：Huang, Jiamin[1]; Zhu, Yuling[2]; Li, Jialin[1]; Lu, Jianping[1]; Zhang, Baogang[1]

机构：[1] School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences Beijing, Beijing, 100083, China; [2] College of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing, 312000, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220086665)

语种：英文

外文关键词：Bacteria - Bioremediation - Carbon dioxide - Groundwater pollution - Sulfur compounds - Uranium compounds

外文摘要：Uranium (VI) (U(VI)) pollution induced by nuclear sector development poses serious environmental risks. Herein, a woodchip-sulfur mixotrophic bioreduction system was proposed to effectively detoxify U(VI). During the 124 days column experiment, the performance of U(VI) removal was relatively stable with the removal efficiency in a range of 78.1-95.9% under fluctuant conditions. Microbial community investigation and gene prediction analysis showed that bacteria (i.e., Macellibacteroides or Proteiniphilum ) transformed woodchip into carbon sources. Endoglucanase and β-glucosidase might mediate the lignocellulolytic degradation. The generated sugars and acids were available for heterotrophic U(VI) reduction microbes (i.e., Desulfovibrio ). Cytochrome c, NADH and P-type ATPases might be involved in U(VI) heterotrophic reduction and binding. Carbon dioxide produced by heterotrophic metabolism could be supplied as an inorganic carbon source for autotrophs. Autotrophic S(0)-oxidizing bacteria (i.e., Sulfurospirillum ) oxidized elemental sulfur to sulfate and generated organic compounds, which could facilitate the heterotrophic U(VI) reduction. With heterotrophs like Desulfovibrio , sulfate could be converted to reduced sulfur compounds, successfully avoiding sulfate accumulation. Our findings provide new insights into the mixotrophic U(VI) bio-reduction process and propose a promising remediation strategy for U(VI) contaminated groundwater. ? 2022, The Authors. All rights reserved.