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Biosensing Naphthenic Acids in Oil Sands Process-Affected Water: Performance of Microbial Fuel Cell and Microbial Electrolysis Cell Biosensors
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DOI：10.1021/acsestwater.5c00919.png)
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Abstract
En 中文
Microbial electrochemical cell (MXC) based biosensors enable accurate and real-time detection of wastewater constituents. However, selecting an appropriate biosensing mode is critical for detection and monitoring, particularly for persistent recalcitrant compounds that resist biodegradation and pose detection challenges. This study compares microbial fuel cell (MFC) and microbial electrolysis cell (MEC) based biosensors for detecting naphthenic acids (NAs) in oil sands process-affected water (OSPW). The impact of sensing mode on standing time, sensitivity, and electrochemical losses was examined. MFC biosensor recorded stable current output within 1 h, significantly faster than the 15 h stabilization required by MEC. Over a 24 h operation, MFC exhibited 3.91 times higher sensitivity (response slope 0.43 ± 0.02) than MEC (0.11 ± 0.02). A strong linear correlation was observed between the current response and NA concentrations (9.21–1.84 mg/L), with R2 values of 0.986 for the MFC and 0.895 for the MEC biosensor. The MFC biosensor demonstrated a rapid response to lower NA concentrations. These findings suggest that MFC-based biosensors could be a practical and cost-effective solution for real-time monitoring in complex wastewater matrices, such as OSPW.
Keywords:
Anions
Biotechnology
Electrodes
Lipids
Sensors
bioelectrochemical sensors
microbial electrochemical biosensors
real-time monitoring
oil sands process-affected water
naphthenic acids
Journal
A
IF:
4.3
Papers:
2.4K
Citations:
4.9K
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Cited Papers