Bio-Electro-Fenton Process Driven by Microbial Fuel Cell for Wastewater Treatment

文献类型： 外文期刊

第一作者： Li, Fang-Bai

作者： Li, Fang-Bai;Feng, Chun-Hua;Mai, Hong-Jian;Li, Xiang-Zhong

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期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：9.028； 五年影响因子：9.922 ）

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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.

分类号： X

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