Abstract
This study presents an innovative microbial fuel cell-based biosensor for carbon monoxide (CO) monitoring. The hypothesis for the function of the biosensor is that CO inhibits bacterial activity in the anode and thereby reduces electricity production. A mature electrochemically active biofilm on the anode was exposed to CO gas at varied concentrations. A proportional linear relationship (R2 = 0.987) between CO concentration and voltage drop (0.8 to 24 mV) in the range of 10% and 70% of CO concentration was observed. Notably, no further decrease of voltage output was observed by with further increasing CO concentration over 70%. Besides, the response time of the biosensor was 1 h. The compact design and simple operation of the biosensor makes it easy to be integrated in existing CO-based industrial facilities either as a forewarning sensor for CO toxicity or even as an individual on-line monitoring device.
Original language | English |
---|---|
Journal | Talanta |
Volume | 186 |
Pages (from-to) | 368-371 |
ISSN | 0039-9140 |
DOIs | |
Publication status | Published - 2018 |
Keywords
- Microbial fuel cells
- Carbon monoxide
- Biosensor
- Toxicity
- Gas phase
- Voltage