Journal
ENVIRONMENTAL RESEARCH
Volume 206, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2021.112605
Keywords
Tetracycline hydrochloride (TCH); Microbial fuel cell (MFC); Electron mediator (EM); Microbial community; Electricity generation; Pollutant removal
Funding
- National Natural Science Foundation of China [21806145]
- State Scholarship Fund
- Key R&D and Promotion Project of Henan Province [202102310278]
- School of Water Conservancy Science and Engineering in Zhengzhou University
Ask authors/readers for more resources
The degradation of TCH in a dual chamber microbial fuel cells (MFCs) led to effective COD removal, with low concentrations of TCH producing electron mediators which improved the performance of the MFC system. Enriched microbial communities played a dominant role in TCH degradation and power generation, with certain electrochemical active bacteria showing tolerance to TCH.
Tetracycline hydrochloride (TCH) is a typical antibiotic pollutant with high toxicity and persistence. The degradation of TCH and the generation of the associated electron mediator in a dual chamber microbial fuel cells (MFCs) were studied. The results of liquid chromatography revealed that TCH could be effectively removed (>93%) in MFCs mode. The maximum COD removal was 88.14 +/- 1.47% in MFCs while it was 69.57 +/- 1.36% in open circuit MFCs. According to cyclic voltammetry, the presence of the relevant redox peaks clearly suggested that the intermediates from TCH degradation could act as endogenous electron mediator. The highest power density of 120.02 +/- 2.76 mW/m2 and the lowest internal resistance of 18.68 omega were achieved in MFC with 2 mg/ L of TCH. Microbial community analysis illustrated that Bacteroides, Comamonas, Clostridium_sensu_stricto, Desulfovibrio and Geobacter were enriched and played a dominant role in TCH degradation and power generation. Electrochemical active bacteria had certain tolerance to TCH and the inhibiting threshold value of TCH was below 5 mg/L. This study provided a new thinking that low concentration of TCH could produce electron mediators to improve the performance of MFC system.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available