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Dechlorination of p,p '-DDTs coupled with sulfate reduction by novel sulfate-reducing bacterium Clostridium sp BXM

文献类型： 外文期刊

作者： Bao, Peng 1 ; Hu, Zheng-Yi 1 ; Wang, Xin-Jun 2 ; Chen, Jian 2 ; Ba, Yu-Xin 1 ; Hua, Jing 1 ; Zhu, Chun-You 1 ; Zhong, Min 2 ;

作者机构： 1.Chinese Acad Sci, Grad Univ, Coll Resources & Environm, Beijing 100049, Peoples R China

2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Environm Resources & Soil Fertilizer, Hangzhou 310021, Zhejiang, Peoples R China

关键词： Sulfate-reducing bacteria;Reduced sulfur compounds;Clostridium sp BXM;Organochlorines;Dechlorination

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）

ISSN： 0269-7491

年卷期： 2012 年 162 卷

页码：

收录情况： SCI

摘要： A novel non-dsrAB (without dissimilatory sulfite reductase genes) sulfate-reducing bacterium (SRB) Clostridium sp. BXM was isolated from a paddy soil. Incubation experiments were then performed to investigate the formation of reduced sulfur compounds (RSC) by Clostridium sp. BXM, and RSC-induced dechlorination of p,p'-DDT in culture medium and soil solution. The RSCs produced were 5.8 mM and 4.5 mM in 28 mM sulfate amended medium and soil solution respectively after 28-day cultivation. The p,p'-DDT dechlorination ratios were 74% and 45.8% for 5.8 mM and 4.5 mM RSCs respectively at Oh. The metabolites of p,p'-DDT found in the two reaction systems were identified as p,p'-DDD and p,p'-DDE. The dechlorination pathways of p,p'-DDT to p,p'-DDD and p,p'-DDE were proposed, based on mass balance and dechlorination time-courses. The results indicated that RSC-induced natural dechlorination may play an important role in the fate of organochlorines. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

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