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Enhancement of the sensitivity of a microbial fuel cell sensor by transient-state operation

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Abstract

One of the main challenges of using a microbial fuel cell (MFC) sensor is its relatively poor sensitivity, which can cause a potential fault warning when used for water monitoring. To address this limitation, this study provides a new transient-state operation mode for an MFC sensor, which is proved applicable for three kinds of detections with higher sensitivity. Under the transient-state mode, the sensitivity increases by 50% to 247% when testing organic matter, acidic toxicants and heavy metals, compared to that of an MFC sensor in conventional constant external resistance connected mode. The mechanism for the improvement is analyzed both experimentally and with an equivalent circuit model. To obtain a higher sensitivity, the output signal of Uon (connected to the external resistance) is more adapted for organic matter monitoring with a wider range, while the output signal of Uoff (disconnected to the external resistance) is better for toxicity monitoring.

Graphical abstract: Enhancement of the sensitivity of a microbial fuel cell sensor by transient-state operation

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Publication details

The article was received on 14 Dec 2016, accepted on 01 Feb 2017, published on 03 Feb 2017 and first published online on 03 Feb 2017


Article type: Paper
DOI: 10.1039/C6EW00346J
Citation: Environ. Sci.: Water Res. Technol., 2017, Advance Article
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    Enhancement of the sensitivity of a microbial fuel cell sensor by transient-state operation

    Y. Jiang, P. Liang, P. Liu, B. Miao, Y. Bian, H. Zhang and X. Huang, Environ. Sci.: Water Res. Technol., 2017, Advance Article , DOI: 10.1039/C6EW00346J

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