Journal
BIORESOURCE TECHNOLOGY
Volume 307, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123176
Keywords
Bio-photoelectrochemical system; Refractory organics degradation; Photocathode potential; Microbial community
Funding
- National Natural Science Foundation of China [21707021, 51668006]
- Natural Science Foundation of Guangxi [2017GXNSFBA198186]
- China Postdoctoral Science Foundation [2018M633295]
- Opening Project of Guangxi Key Laboratory of Clean Pulp AMP
- Papermaking and Pollution Control [KF201723, 2019KF19]
- Guangxi Science and Technology Research Program [AA17202032]
- Young Teachers Innovation Cultivation Program from Guangxi Bossco Environmental Protection Technology Co., Ltd. [BRP180261]
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The single-chamber bio-photoelectrochemical system (BPES) with a BiOBr photocathode was developed for acid orange 7 (AO7), 2,4 dichlorophenol (2,4-DCP) and chloramphenicol (CAP) degradation under solar irradiation. Photoelectrochemical characterizations showed that the optimized BiOBr-photocathode exhibited great light-response property and excellent electrochemcial performance. Moreover, desired TOC removals were achieved for various organic pollutants, with the values of 90.97% (AO7), 81.41% (2,4-DCP) and 78.47% (CAP). Besides, the lower cathode potentials in the illuminated BPESs were favorable to efficient pollutants degradation. Significant microbial community shifts were observed among the inoculation and anodic biofilms from the BPES, and the most dominated species in anodic biofilms acclimated to various pollutants were Geobacter and Pseudomonas, which have the abilities of extracellular electrons transfer and organics degradation. Some other species that different from the inoculation were also identified from the BPES biofilms. This study suggested that BPES had great potential for refractory organics degradation.
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