Interactively interfacial reaction of iron-reducing bacterium and goethite for reductive dechlorination of chlorinated organic compounds  

作　　者：LI XiaoMin LI YongTao LI FangBai ZHOU ShunGui FENG ChunHua LIU TongXu 

机构地区：[1]Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China [2]Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China [3]College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China [4]School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China [5]Graduate University of Chinese Academy of Sciences, Beijing 100039, China

出　　处：《Chinese Science Bulletin》2009年第16期2800-2804,共5页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 40601043 and 40771105)

摘　　要：The interactively interfacial reactions between the iron-reducing bacterium (Shewanella decolorationis, S12) and iron oxide (α-FeOOH) were investigated to determine reductive dechlorination transformation of chlorinated organic compounds (chloroform and pentachlorophenol). The results showed that the interactive system of S12+ α-FeOOH exhibited relatively high dechlorination rate. By comparison, the S12 biotic system alone had no obvious dechlorination, and the α-FeOOH abiotic system showed low dechlorination rate. The enhanced dechlorination of chloroform and pentachlorophenol in the interactive system of S12+α-FeOOH was derived from the promoted generation of adsorbed Fe(Ⅱ) by S12. A decrease in redox potential of the Fe(Ⅲ)/Fe(Ⅱ) couple in the interactive reaction system was determined by cyclic voltammetry. Our results will give new insight into interactively interfacial reaction between iron-reducing bacterium and iron oxides for degradation of chlorinated organic compounds under anaerobic condition.The interactively interfacial reactions between the iron-reducing bacterium （Shewanella decolorationis, S12） and iron oxide （α-FeOOH） were investigated to determine reductive dechlorination transformation of chlorinated organic compounds （chloroform and pentachlorophenol）. The results showed that the interactive system of S12＋ α-FeOOH exhibited relatively high dechlorination rate. By comparison, the S12 biotic system alone had no obvious dechlorination, and the α-FeOOH abiotic system showed low dechlorination rate. The enhanced dechlorination of chloroform and pentachlorophenol in the interactive system of S12＋α-FeOOH was derived from the promoted generation of adsorbed Fe（Ⅱ） by S12. A decrease in redox potential of the Fe （Ⅲ）/Fe （Ⅱ） couple in the interactive reaction system was determined by cyclic voltammetry. Our results will give new insight into interactively interfacial reaction between iron-reducing bacterium and iron oxides for degradation of chlorinated organic compounds under anaerobic condition.

关 键 词：有机氯化合物 还原脱氯 界面反应 针铁矿 交互式 铁细菌 FEOOH 生物系统 

分 类 号：X830.2[环境科学与工程—环境工程] X132