期刊
BIORESOURCE TECHNOLOGY
卷 276, 期 -, 页码 236-243出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.01.006
关键词
Oxytetracycline (OTC); Dual graphene modified bioelectrode (D-GM-BE); Microbial fuel cell (MFC); Bacterial community shift; Antibiotics resistant genes (ARGs)
资金
- Natural Science Fund of Shandong Province [ZR201807080104]
- National Natural Science Fund of China [31700433, 31672314]
- Scientific Research Fund of Qufu Normal University
This study explored the biodegradation mechanisms of oxytetracycline (OTC/O) and electrochemical characteristics from the perspective of bacterial community shift and OTC resistance genes in dual graphene modified bioelectrode microbial fuel cell (O-D-GM-BE MFC). In phylum level, Proteobacteria was accounted to 95.04% in O-GM-BA, Proteobacteria and Bacteroidetes were accounted to 59.13% and 20.52% in O-GM-BC, which were beneficial for extracellular electron transport (EET) process and OTC biodegradation. In genus level, the most dominant bacteria in O-GM-BA were Salmonella and Trabulsiella, accounting up to 83.04%, moreover, representative exoelectrogens (Geobacter) were enriched, which contributed to OTC biodegradation and electrochemical performances; abundant degrading bacteria (Moheibacter, Comamonas, Pseudomonas, Dechloromonas, Nitrospira, Methylomicrobium, Pseudorhodoferax, Thiobacillus, Mycobacterium) were enriched in O-GM-BC, which contributed to the maximum removal efficiency of OTC; coding resistance genes of efflux pump, ribosome protective protein and modifying or passivating were all found in O-GM-BE, and this explained the OTC removal mechanisms from gene level.
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