期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 344, 期 -, 页码 669-678出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2017.10.021
关键词
Triclosan; Microbial fuel cell; Biodegradation; Anoxic condition
资金
- NSFC [21322703, 41471260, 51378141]
- Natural Science Foundation for Distinguished Young Scholars of Fujian Province [2014J06007]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [2016DX04]
Triclosan (TCS) is an emerging organic contaminant in the environment. Here, the anoxic bio-degradation of TCS in microbial fuel cells (MFCs) was explored. It was found that anoxic biodegradation of TCS could be achieved in MFC, and the removal rate of TCS was accelerated after reactor acclimation. After 7 months of operation, 10 mg/L TCS could be removed within 8 days in MFCs. Fluorescence microscopy results revealed that the microbe cells in the reactors were intact, and the microbes were in active state. Flow cytometry test showed that the proliferation of inoculated microbe was higher in MFC effluent than that in TCS solution. These data indicate that the biotoxicity of TCS has been largely eliminated after the treatment. The microbial community shift during the TCS degradation process was investigated as well. Species such as Geothrix, Corynebacterium, Sulfobacillus, GOUTA19, Geobacter, Acidithiobacillus and Acinetobacter, which were capable for the degradation of benzene-related and dechlorination of chlorine-containing chemicals, were flourished in the electrode biofilm. They may participate in the biodegradation of TCS. This work provides a new perspective for the anoxic biodegradation of recalcitrant organics, and can be useful for the in-situ bioremediation of environmental pollutants with the removal of their biotoxicity. (C) 2017 Published by Elsevier B.V.
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