铁酸盐
砷
环境化学
化学
还原(数学)
方位(导航)
活性炭
碳纤维
环境科学
材料科学
有机化学
地理
吸附
复合材料
几何学
复合数
地图学
数学
作者
Song Wu,Jianmin Chen,Dengjun Wang,Yan Jin,Peixin Cui,Rong Wang,Yu Wang,Lu Wang,David H. Sherman,Jianmin Chen
出处
期刊:ACS earth and space chemistry
[American Chemical Society]
日期:2018-07-09
卷期号:2 (9): 878-887
被引量:24
标识
DOI:10.1021/acsearthspacechem.8b00058
摘要
Microbial reduction of arsenic (As)-bearing Fe(III)-(oxyhydr)oxides is one of the major processes for the release of As in various environmental settings such as acid mine drainage, groundwater, and flooded paddy soil. Pyrogenic carbon has recently been reported to facilitate microbial extracellular reduction of Fe(III)-(oxyhydr)oxides. The aim of this study was to investigate the important hot topic regarding the fate and transformation of As during activated carbon (AC) facilitated microbial reduction of As-bearing ferrihydrite. Our results show that the rate and extent of Fe(III) reduction in As-bearing ferrihydrite by Shewanella oneidensis MR-1 were accelerated by AC. The AC facilitated reduction caused the release of As(III) into the solution, whereas it caused the preferential immobilization of As(V) on the solid phase. Furthermore, AC accelerated the precipitation of vivianite and siderite in sequence during microbial reduction processes. Both of the formed vivianite and siderite had an insignifica...
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