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	Rapid detection of biodegradable organic matter in polluted water with microbial fuel cell sensor: Method of partial coulombic yield
	Gao, Yangyang1,2,3; Yin, Fengjun1,2,3; Ma, Weiqi1,2,3; Wang, Sha1,2,3; Liu, Yuan1,2,3; Liu, Hong1,2,3
	2020-06-01
摘要	The quantification of biodegradable organic matter (BOM) in polluted water plays an essential role for biodegradation-based processing of wastewater and management of water environment. Compared with the traditional detection of five-day biochemical oxygen demand (BOD5), microbial fuel cell (MFC) sensors have shown an advantage for rapid and more accurate BOM assessment in several hours using coulombic yield of MFC as the signal. In this study, we propose a new calculation method that relies on the partial coulombic yield (P-CY) to further shorten the duration of the measurement. The P-CY is the cumulative coulomb at the point at which the voltage acquisition reaches a maximum voltage drop rate. The detection results with the standard GGA solution (a mixture of glucose and glutamic acid) show an enhanced linear relationship ranging from 37.5 mg L-1 to 375 mg L-1 in comparison to conventional methods. Notably, the response time for P-CY is remarkably shortened (0.99 +/- 0.18-18.08 +/- 0.58 h). The cutoff point for P-CY has more stable electrochemical characteristics, which enhances the accuracy of BOM detection. Furthermore, the validity of our determination of the cutoff point for P-CY is demonstrated by a mathematical model based on the Michaelis-Menten equation. Thus, the P-CY method is viable for the rapid detection of BOM in polluted water. (C) 2020 Elsevier B.V. All rights reserved.
关键词	Biodegradable organic matter Partial coulombic yield Cutoff point Biosensor
DOI	10.1016/j.bioelechem.2020.107488
发表期刊	BIOELECTROCHEMISTRY
ISSN	1567-5394
卷号	133页码:8
通讯作者	Liu, Hong(liuhong@cigit.ac.cn)
收录类别	SCI
WOS记录号	WOS:000531827700025
语种	英语