PMID- 34426232 OWN - NLM STAT- MEDLINE DCOM- 20210914 LR - 20210914 IS - 1873-2976 (Electronic) IS - 0960-8524 (Linking) VI - 340 DP - 2021 Nov TI - Efficient degradation of refractory pollutant in a microbial fuel cell with novel hybrid photocatalytic air-cathode: Intimate coupling of microbial and photocatalytic processes. PG - 125717 LID - S0960-8524(21)01058-0 [pii] LID - 10.1016/j.biortech.2021.125717 [doi] AB - A microbial fuel cell-photocatalysis system with a novel photocatalytic air-cathode (MFC-PhotoCat) was proposed for synergistic degradation of 2,4,6-trichlorophenol (TCP) with simultaneous electricity generation. Stable electricity generation of 350 mV was achieved during 130 days of operation. Besides, 50 mg L(-1) TCP was completely degraded within 72 h, and the rate constant of 0.050 h(-1) was 1.8-fold higher than MFC with air-cathode without N-TiO(2) photocatalyst. Degradation pathway was proposed based on the intermediates detected and density functional theory (DFT) calculation, with two open-chain intermediates (2-chloro-4-keto-2-hexenedioic acid and hexanoic acid) detected. Furthermore, hierarchical cluster and PCoA revealed significant shifts of microbial community structures, with enriched exoelectrogen (55.2% of Geobacter) and TCP-degrading microbe (7.1% of Thauera) on the cathode biofilm as well as 61.8% of Pseudomonas in the culture solution. This study provides a promising strategy for synergic degradation of recalcitrant contaminants by intimate-coupling of MFC and photocatalysis. CI - Copyright (c) 2021 Elsevier Ltd. All rights reserved. FAU - Zhu, Qian AU - Zhu Q AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China. FAU - Wang, Xiaoxuan AU - Wang X AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China. FAU - Hu, Jingping AU - Hu J AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China. FAU - Chen, Sijing AU - Chen S AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China. FAU - Hu, Shaogang AU - Hu S AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China. FAU - Wu, Yaqian AU - Wu Y AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China. FAU - Liu, Bingchuan AU - Liu B AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China. FAU - Xiao, Keke AU - Xiao K AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China. FAU - Liang, Sha AU - Liang S AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China. FAU - Yang, Jiakuan AU - Yang J AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China. FAU - Hou, Huijie AU - Hou H AD - School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China; Hubei Provincial Engineering Laboratory for Solid Waste Treatment Disposal and Recycling, Wuhan, Hubei 430074, PR China. Electronic address: houhuijie@hust.edu.cn. LA - eng PT - Journal Article DEP - 20210804 PL - England TA - Bioresour Technol JT - Bioresource technology JID - 9889523 RN - 0 (Environmental Pollutants) SB - IM MH - *Bioelectric Energy Sources MH - Electricity MH - Electrodes MH - *Environmental Pollutants MH - *Geobacter OTO - NOTNLM OT - 2,4,6-Trichlorophenol OT - Air-cathode OT - Microbial community OT - Microbial fuel cell OT - Photocatalysis EDAT- 2021/08/25 06:00 MHDA- 2021/09/15 06:00 CRDT- 2021/08/24 05:45 PHST- 2021/06/09 00:00 [received] PHST- 2021/07/29 00:00 [revised] PHST- 2021/07/31 00:00 [accepted] PHST- 2021/08/25 06:00 [pubmed] PHST- 2021/09/15 06:00 [medline] PHST- 2021/08/24 05:45 [entrez] AID - S0960-8524(21)01058-0 [pii] AID - 10.1016/j.biortech.2021.125717 [doi] PST - ppublish SO - Bioresour Technol. 2021 Nov;340:125717. doi: 10.1016/j.biortech.2021.125717. Epub 2021 Aug 4.