Arsenic redox transformation by Pseudomonas sp.HN-2 isolated from arsenic-contaminated soil in Hunan,China

查看全文 作　　者：Zhennan [1,2]Zhang; Naiyi [1,2]Yin; Xiaolin [1,2]Cai; Zhenzhou [1,2]Wang; Yanshan [1,2]Cui

机构地区：[1]College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China;[2]Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

出　　处：《Journal of Environmental Sciences》索引2016年第28卷第9期,共9页

基　　金：supported by the National Natural Science Foundation of China (No.41571451);the Special Funds for Science and Education Fusion of University of Chinese Academy of Sciences 摘　　要：A mesophilic,Gram-negative,arsenite[As(Ⅲ)]-oxidizing and arsenate[As(V)]-reducing bacterial strain,Pseudomonas sp.HN-2,was isolated from an As-contaminated soil.Phylogenetic analysis based on 16 S r RNA gene sequencing indicated that the strain was closely related to Pseudomonas stutzeri.Under aerobic conditions,this strain oxidized 92.0%(61.4 μmol/L) of arsenite to arsenate within 3 hr of incubation.Reduction of As(V) to As(Ⅲ) occurred in anoxic conditions.Pseudomonas sp.HN-2 is among the first soil bacteria shown to be capable of both aerobic As(Ⅲ) oxidation and anoxic As(V) reduction.The strain,as an efficient As(Ⅲ) oxidizer and As(V) reducer in Pseudomonas,has the potential to impact arsenic mobility in both anoxic and aerobic environments,and has potential application in As remediation processes. 关键词：氧化还原假单胞菌土壤细菌砷污染 PSEUDOMONAS 分离转化湖南

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Arsenic redox transformation by Pseudomonas sp.HN-2 isolated from arsenic-contaminated soil in Hunan,China

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