Anaerobic degradation of xenobiotic organic contaminants(XOCs):The role of electron flow and potential enhancing strategies  

作　　者：Yijing Li Shanghua Wu Shijie Wang Shijie Zhao Xuliang Zhuang 

机构地区：[1]Key Laboratory of Environmental Biotechnology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]College of Sino-Danish Center,University of Chinese Academy of Sciences,Beijing 100049,China [3]College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Environmental Sciences》2021年第3期397-412,共16页环境科学学报（英文版）

基　　金：supported by National Key R&D Program of China(Nos.2019YFC1805803);the National Natural Science Foundation of China(Nos.91951108,41907273 and 31670507);the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDA23010400);Science and Technology Service Network Initiative of the Chinese Academy of Sciences(Grant KFJ-STS-ZDTP-064)。

摘　　要：In groundwater,deep soil layer,sediment,the widespread of xenobiotic organic contaminants(XOCs)have been leading to the concern of human health and eco-environment safety,which calls for a better understanding on the fate and remediation of XOCs in anoxic matrices.In the absence of oxygen,bacteria utilize various oxidized substances,e.g.nitrate,sulphate,metallic(hydr)oxides,humic substance,as terminal electron acceptors(TEAs)to fuel anaerobic XOCs degradation.Although there have been increasing anaerobic biodegradation studies focusing on species identification,degrading pathways,community dynamics,systematic reviews on the underlying mechanism of anaerobic contaminants removal from the perspective of electron flow are limited.In this review,we provide the insight on anaerobic biodegradation from electrons aspect-electron production,transport,and consumption.The mechanism of the coupling between TEAs reduction and pollutants degradation is deconstructed in the level of community,pure culture,and cellular biochemistry.Hereby,relevant strategies to promote anaerobic biodegradation are proposed for guiding to an efficient XOCs bioremediation.

关 键 词：Organic contamination Anoxic environment Anaerobic biodegradation Terminal electron acceptor processes(TEAPs) 

分 类 号：X505[环境科学与工程—环境工程]