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题名: Comparison of arsenate reduction and release by three As(V)-reducing bacteria isolated from arsenic-contaminated soil of Inner Mongolia, China
作者: Cai, Xiaolin; Zhang, Zhennan; Yin, Naiyi; Du, Huili; Li, Zejiao; Cui, Yanshan
刊名: CHEMOSPHERE
出版日期: 2016-10
卷号: 161, 页码:200-207
关键词: As(V)-reducing bacteria ; Arsenate reduction ; As release ; Goethite
DOI: 10.1016/j.chemosphere.2016.06.102
部门归属: 土壤环境科学实验室
英文摘要: Arsenic (As) contamination has become a worldwide environmental problem: arsenite (As(III)) especially has posed a major threat to human health. Here, we report the first three isolates of anaerobic As(V)reducing bacterial strains (strains JQ DJ-3 and DJ-4) from a soil sample containing 48.7% of total As in the form of As(III) collected in Chifeng, Inner Mongolia, China. Strains JQ, DJ-3 and DJ-4 were phylogenetically closely related to Bacillus, Desuffitobacterium and Exiguobacterium, respectively. Among these strains, JQ and DJ-3 have the arsC gene, DJ-4 possesses the arrA gene. The three strains could all resist and reduce high concentrations of As(V) under anoxic conditions. The order of resistance to As(V) was DJ 3 > JQ > DJ-4. Strain DJ-3 not only possesses the strongest resistance to As(V) but could also reduce 53% of the As(V) to As(III) in the treatment of 60 mM As(V) in 5 d. All three strains could release As from goethite; strain DJ-4 has the highest ability to promote the release of As (90.5%) from goethite. These results suggested that strains JQ DJ-3 and DJ-4 may play an important role in the mobilization and transformation of As in soil. (C) 2016 Elsevier Ltd. All rights reserved.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36246
Appears in Collections:土壤环境科学实验室_期刊论文

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