Microbial fuel cell sensor with biocathode sensing element for water and air monitoring
The traditional microbial fuel cell (MFC) sensor with bioanode as sensing element delivers limited sensitivity to water monitoring,restricted application to only anaerobic and organic rich water body,and increased potential fault warning to the combined shock of organic matter/toxicity.In this study,the biocathode for oxygen reduction reaction was employed as the sensing element in MFC sensor for water monitoring.The results shown that the sensitivity of MFC sensor with biocathode sensing element (7.4 ± 2.0-67.5 ± 4.0 mA %-1 cm-2) was much greater than that showed by bioanode sensing element (3.4 ± 1.5-5.5 ± 0.7 mA %-1 cm-2) for formaldehyde in water sample.The biocathode sensing element made the MFC sensor directly applied to clean water body monitoring,e.g.,drinking water and reclaimed water,without the amending of background organic matter,and it also decreased the warning failure when challenged by a combined shock of organic matter/toxicity,The MFC sensor with biocathode sensing element was further operated with passive oxygen transfer for air monitoring.As a concept of proof,this novel MFC sensor was capable for detection of organic vapours like formaldehyde in air.The detection limit for formaldehyde was 20 ppm.The results shown that the MFC sensor with biocathode sensing element could be served as a self-powered air pollution monitoring system under room temperature.
Biosensor,biocathode,toxicity,sensitivity,signal interference air monitoring
Yong Jiang Peng Liang Xia Huang
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, P.R.China
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
593-596
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）