文献类型：期刊文献

英文题名：Natural attenuation model and biodegradation for 1,1,1-trichloroethane contaminant in shallow groundwater

作者：Lu, Qiang[1];Zhu, Rui-Li[2];Yang, Jie[2];Li, Hui[1];Liu, Yong-Di[1];Lu, Shu-Guang[1];Luo, Qi-Shi[3];Lin, Kuang-Fei[1]

机构：[1]E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Sch Resource & Environm Engn, Shanghai 200237, Peoples R China;[2]Shanghai Acad Environm Sci, Shanghai, Peoples R China;[3]Shanghai Inst Design & Res Environm Engn, Shanghai Engn Res Ctr Contaminated Sites Remediat, Shanghai, Peoples R China

年份：2015

卷号：6

外文期刊名：FRONTIERS IN MICROBIOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000360338300001)】；

基金：Supported jointly by National Natural Science Foundation of China (41273109, 51378208), Program for New Century Excellent Talents in University (NCET-13-0797), Fok Ying Tung Education Foundation (141077), Specialized Research Fund for the Doctoral Program of Higher Education (20110074130002), Innovation Program of Shanghai Municipal Education Commission (14ZZ059), Fundamental Research Funds for the Central Universities (222201313008). 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：1,1,1-trichloroethane; contaminated groundwater; natural attenuation; bacterial communities; dechlorination

摘要：Natural attenuation is an effective and feasible technology for controlling groundwater contamination. This study investigated the potential effectiveness and mechanisms of natural attenuation of 1,1,1-trichloroethane (TCA) contaminants in shallow groundwater in Shanghai by using a column simulation experiment, reactive transport model, and 16S rRNA gene clone library. The results indicated that the majority of the contaminant mass was present at 2-6 m in depth, the contaminated area was approximately 1000 m x 1000 m, and natural attenuation processes were occurring at the site. The effluent breakthrough curves from the column experiments demonstrated that the effectiveness of TCA natural attenuation in the groundwater accorded with the advection-dispersion-reaction equation. The kinetic parameter of adsorption and biotic dehydrochlorination of TCA was 0.068 m3/kg and 0.0045 d(-1). The contamination plume was predicted to diminish and the maximum concentration of TCA decreased to 280 mu g/L. The bacterial community during TCA degradation in groundwater belonged to Trichococcus, Geobacteraceae, Geobacter, Mucilaginibacter, and Arthrobacter.