Bio-electro-Fenton process driven by microbial fuel cell for wastewater treatment

Environmental Science & Technology
Chunhua FengXiangzhong Li

Abstract

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 decolorationis S12 in its anaerobic anode chamber and transferred to its aerated cathode chamber equipped with a carbon nanotube (CNT)/gamma-FeOOH composite cathode. In the cathode chamber, the Fenton's reagents including hydrogen peroxide (H(2)O(2)) and ferrous irons (Fe(2+)) 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 gamma-FeOOH in the composite cathode was 1:1, the system demonstrated the fastest ...Continue Reading

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Citations

Apr 25, 2013·Journal of Hazardous Materials·Hu-Chun TaoNan Xu
May 27, 2014·Journal of Hazardous Materials·Xiang-Qin WangFang-bai Li
Jun 10, 2014·Environmental Science and Pollution Research International·Wei GuoJianhui Sun
Dec 26, 2015·Bioresource Technology·Yang LiHan-Qing Yu
Feb 5, 2015·Environmental Technology·Yuan YuanNan-Qi Ren
Apr 25, 2013·Bioresource Technology·Nan XuYaqiong Zeng
Jun 5, 2016·Journal of Environmental Management·Noushin BirjandiMostafa Rahimnejad
Mar 5, 2016·Chemical Society Reviews·Min SunHan-Qing Yu
Mar 14, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Qian ZhaoNan Li
Aug 5, 2017·Materials·Yi-Ta Wang, Ruei-Shiang Wang
Oct 23, 2019·The Science of the Total Environment·Shengnan LiFengxiang Li
Mar 20, 2021·The Science of the Total Environment·Xiaoyong YangYifeng Zhang
May 12, 2021·Reviews on Environmental Health·Jin NiQunhui Wang
Jun 22, 2021·Environmental Science & Technology·Shuo ZhangJae-Hong Kim
Jan 21, 2015·Environmental Science & Technology·Guandao GaoChad D Vecitis
Aug 2, 2018·Environmental Science & Technology·Wen-Li JiangAi-Jie Wang
Sep 18, 2021·Journal of Basic Microbiology·Azhan AhmadMakarand Madhao Ghangrekar

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