Reductive dechlorination and mineralization of pentachlorophenol in biocathode microbial fuel cells

Bioresource Technology
Liping HuangGuohua Chen

Abstract

Simultaneous anaerobic and aerobic degradation pathways in two-chamber, tubular microbial fuel cells (MFCs) facilitated pentachlorophenol (PCP) mineralization by a mediator-less biocathode. PCP was degraded at a rate of 0.263 ± 0.05 mg/L-h (51.5 mg/g VSS-h) along with power generation of 2.5 ± 0.03 W/m(3). Operating the biocathode MFC at 50°C improved the PCP degradation rate to 0.523 ± 0.08 mg/L-h (103 mg/g VSS-h) and power production to 5.2 ± 0.03 W/m(3). A pH of 6.0 increased the PCP degradation rate to 0.365 ± 0.02 mg/L-h (71.5mg/g VSS-h), but reduced power. While mediators were not needed, adding anthraquinone-2,6-disulfonate increased power and PCP degradation rates. Dominant bacteria most similar to the anaerobic Desulfobacterium aniline, Actinomycetes and Streptacidiphilus, and aerobic Rhodococcus erythropolis, Amycolatopsis and Gordonia were found on the biocathode. These results demonstrate efficient degradation of PCP in biocathode MFCs and the effects of temperature, pH and mediators.

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Citations

Sep 11, 2013·Journal of Hazardous Materials·Jingli ZhangFeng Mei
Apr 24, 2013·Environmental Science & Technology·Bin LiangDuu-Jong Lee
Aug 12, 2014·Bioresource Technology·Jeongdong Choi, Yang Liu
Jun 19, 2013·Biotechnology and Bioengineering·Jana RakoczyHans H Richnow
May 16, 2015·Bioresource Technology·Byung Hong KimIn Seop Chang
Dec 1, 2012·Bioresource Technology·A Evren TugtasBaris Calli
Feb 11, 2015·Water Research·Deyong KongNanqi Ren
Oct 18, 2016·Journal of Hazardous Materials·Mengjie FanShemin Zhu
Oct 14, 2017·Critical Reviews in Biotechnology·Thomas William Seviour, Jamie Hinks
Jul 4, 2021·Environmental Science and Pollution Research International·Najwa Najihah Mohamad DaudMohamad Nasir Mohamad Ibrahim

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