Environmental Science & Technology
7January 2021
Microaerophilic Oxidation of Fe(II) Coupled with Simultaneous Carbon Fixation and As(III) Oxidation and Sequestration in Karstic Paddy Soil
Hui Tong1,2,3, Chunju Zheng2, Bing Li4, Elizabeth D. Swanner3, Chengshuai Liu2,5,*, Manjia Chen1, Yafei Xia2, Yuhui Liu2, Zengping Ning2, Fangbai Li1, and Xinbin Feng2,5
1 National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou510650, China
2 State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang550081, China
3 Department of Geological and Atmospheric Sciences, Iowa State University, Ames50011, Iowa, United States
4 Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen518055, China
5 CAS Center for Excellence in Quaternary Science and Global Change, Xi'an710061, China
10.1021/acs.est.0c05791
In karstic soils, the micro-oxic conditions could promote vital geochemical processes for element cycling. The results of this study demonstrate that carbon fixation coupled to Fe(II) oxidation can increase the carbon content in soils by microaerophilic Fe(II)-oxidizing bacteria, as well as accelerate As(III) sequestration association with Fe(III) (oxyhydr)oxides.
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