文献类型： 外文期刊
作者： Feng, Chun-Hua 2 ; Li, Fang-Bai 1 ; Mai, Hong-Jian 2 ; Li, Xiang-Zhong 3 ;
作者机构： 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China
2.S China Univ Technol, Sch Chem & Chem Engn, Minist Educ, Key Lab Enhanced Heat Transfer & Energy Conservat, Guangzhou 510640, Guangdong, Peoples R China
3.Hong Kong Polytech Univ, Dept Civil & Struct Engn, Hong Kong, Hong Kong, Peoples R China
期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：9.028； 五年影响因子：9.922 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： In this study, we proposed a new concept of utilizing the biological electrons produced from a microbial fuel cell (MFC) to power an E-Fenton process to treat wastewater at neutral pH as a bioelectro-Fenton (Bio-E-Fenton) process. This process can be achieved in a dual-chamber MFC from which electrons were generated via the catalyzation of Shewanella decolorations S12 in its anaerobic anode chamber and transferred to its aerated cathode chamber equipped with a carbon nanotube (CNT)/γ-FeOOH composite cathode. In the cathode chamber, the Fenton's reagents including hydrogen peroxide (H2O2) and ferrous irons (Fe~(1+)) were in situ generated. This Bio-E-Fenton process led to the complete decolorization and mineralization of Orange II at pH 7.0 with the apparent first-order rate constants, k_(app) = 0.212 h~(-1) and k_(TOC) = 0.0827 h~(-1), respectively, and simultaneously produced a maximum power output of 230 mW m~(-2) (normalized to the cathode surface area). The apparent mineralization current efficiency was calculated to be as high as 89%. The cathode composition was an important factor in governing system performance. When the ratio of CNT to γ-FeOOH in the composite cathode was 1:1, the system demonstrated the fastest rate of Orange II degradation, corresponding to the highest amount of H2O2 formed.
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