文献类型：期刊文献

英文题名：EDDS enhanced Shewanella putrefaciens CN32 and α-FeOOH reductive dechlorination of carbon tetrachloride

作者：Zhou, Li Yang[1];Chen, Shuai[1];Li, Hui[1,2];Guo, Shu[3];Di Liu, Yong[1];Yang, Jie[4]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Shanghai 200239, Peoples R China;[3]South China Inst Environm Sci, Ctr Environm Hlth Res, MEP, Guangzhou 510535, Guangdong, Peoples R China;[4]Shanghai Acad Environm Sci, Res Inst Wastes & Soil Remediat, Shanghai 200233, Peoples R China

年份：2018

卷号：198

起止页码：556

外文期刊名：CHEMOSPHERE

收录：;EI(收录号：20180604763702);WOS:【SCI-EXPANDED(收录号:WOS:000427338800063)】；

基金：This work was supported jointly by the National key research and development plan (2016YFC0206200), the National Natural Science Foundation of China (51578240), the Fok Ying Tung Education Foundation (141077), Open Foundation of State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences (SKLE-CRA2016OFP19), Open Foundation of Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, and the Innovation Program of the Shanghai Municipal Education Commission (1422059). We also would like to thank the anonymous referees for their helpful comments on this paper.

语种：英文

外文关键词：EDDS; Complexation; Reductive dechlorination; Carbon tetrachloride; Surface-bound iron species

摘要：S,S-ethylenediamine-N,N-disuccinic acid (EDDS) enhanced reductive dissolution of (alpha-FeOOH by Shewanella putrefaciens CN32 (CN32), resulting in formation of surface-bound Fe(II) species (equivalent to(FeEDDS)-E-II) to improve reductive dechlorination of carbon tetrachloride (CT). The pseudo-first-order rate constants for bio-reduction extents of alpha-FeOOH by CN32 in the presence of 1.36 mM EDDS was 0.023 +/- 0.0003 d(-1) which was higher than without EDDS. The enhancement mechanism of bio-reduction was attributed to the strong complexation ability of EDDS to formed equivalent to(FeEDDS)-E-III, which could be better utilized by CN32. The dechlorination kinetic of CT by equivalent to(FeEDDS)-E-II (2.016 h(-1)) in the presence of 1.36 mM EDDS was 24 times faster than without EDDS. Chloroform were detected as main products for the degradation of CT. The chemical analyses and morphological observation showed that combination between EDDS and Fe2+ produced equivalent to(FeEDDS)-E-II complex, which had a reductive potential of -0.375 V and significantly enhanced CT dechlorination. The results showed that EDDS played an important role in enhancing the bio-reduction of alpha-FeOOH to accelerate reductive dechlorination of CT. (C) 2018 Published by Elsevier Ltd.