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Article

Three-Stage Single-Chambered Microbial Fuel Cell Biosensor Inoculated with Exiguobacterium aestuarii YC211 for Continuous Chromium (VI) Measurement

1
Department of Logistics Engineering, Dongguan Polytechnic, Dongguan City 523808, China
2
Research Center of Natural Cosmeceuticals Engineering, Xiamen Medical College, Xiamen 361008, China
3
Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan
4
Department of Biological Science and Technology, China University of Science and Technology, Taipei 11581, Taiwan
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Sensors 2019, 19(6), 1418; https://doi.org/10.3390/s19061418
Received: 2 March 2019 / Revised: 17 March 2019 / Accepted: 19 March 2019 / Published: 22 March 2019
(This article belongs to the Special Issue Sensors for Water Monitoring)
Chromium (VI) [Cr(VI)] compounds display high toxic, mutagenic, and carcinogenic potential. Biological analysis techniques (e.g., such as enzyme-based or cell-based sensors) have been developed to measure Cr(VI); however, these biological elements are sensitive to the environment, limited to measuring trace Cr(VI), and require deployment offsite. In this study, a three-stage single-chambered microbial fuel cell (SCMFC) biosensor inoculated with Exiguobacterium aestuarii YC211 was developed for in situ, real-time, and continuous Cr(VI) measurement. A negative linear relationship was observed between the Cr(VI) concentration (5–30 mg/L) and the voltage output using an SCMFC at 2-min liquid retention time. The theoretical Cr(VI) measurement range of the system could be extended to 5–90 mg/L by connecting three separate SCMFCs in series. The three-stage SCMFC biosensor could accurately measure Cr(VI) concentrations in actual tannery wastewater with low deviations (<7%). After treating the wastewater with the SCMFC, the original inoculated E. aestuarii remained dominant (>92.5%), according to the next-generation sequencing analysis. The stable bacterial community present in the SCMFC favored the reliable performance of the SCMFC biosensor. Thus, the three-stage SCMFC biosensor has potential as an early warning device with wide dynamic range for in situ, real-time, and continuous Cr(VI) measurement of tannery wastewater. View Full-Text
Keywords: biosensor; chromium; microbial fuel cell; wastewater biosensor; chromium; microbial fuel cell; wastewater
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MDPI and ACS Style

Wu, L.-C.; Wang, G.-H.; Tsai, T.-H.; Lo, S.-Y.; Cheng, C.-Y.; Chung, Y.-C. Three-Stage Single-Chambered Microbial Fuel Cell Biosensor Inoculated with Exiguobacterium aestuarii YC211 for Continuous Chromium (VI) Measurement. Sensors 2019, 19, 1418. https://doi.org/10.3390/s19061418

AMA Style

Wu L-C, Wang G-H, Tsai T-H, Lo S-Y, Cheng C-Y, Chung Y-C. Three-Stage Single-Chambered Microbial Fuel Cell Biosensor Inoculated with Exiguobacterium aestuarii YC211 for Continuous Chromium (VI) Measurement. Sensors. 2019; 19(6):1418. https://doi.org/10.3390/s19061418

Chicago/Turabian Style

Wu, Li-Chun, Guey-Horng Wang, Teh-Hua Tsai, Shih-Yu Lo, Chiu-Yu Cheng, and Ying-Chien Chung. 2019. "Three-Stage Single-Chambered Microbial Fuel Cell Biosensor Inoculated with Exiguobacterium aestuarii YC211 for Continuous Chromium (VI) Measurement" Sensors 19, no. 6: 1418. https://doi.org/10.3390/s19061418

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