[Development of a low-cost single chamber microbial fuel cell type BOD sensor].
The principle of the detector is based on the effect of microbial toxicity of water sample on the electricity generation in microbial fuel cell (MFC). The performance of the MFC-type biotoxicity detector was evaluated with the synthetic water containing heavy metals of Cd2+ and Cu2+. The experimental results demonstrated that: (1) relative to the conventional methods, the MFC-type detector is easy to operate, and suitable for on-line measurements with high sensitivity; (2) it only requires 4 h to complete measurements, and can get ready for next measurement within 4 h; (3) there is a significant linear correlation between the concentration of toxic metal(s) and inhibition ratios in Coulombic yields of MFC. As the IC20 (concentration causing 20% inhibition) of Cd2+, Cu2+ and mixed metals (Cd2+ and Cu2+) were 0.6, 0.8 and 0.25 mg/L, the regression coefficients were shown to be 0.9960, 0.9744 and 0.9907.
Wu
Feng
F
College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China. canboyu@163.com
Liu
Zhi
Z
Zhou
Ben
B
Zhou
Shun-gui
SG
Rao
Li-qun
LQ
Wang
Yue-qiang
YQ
D001674:Bioelectric Energy Sources; D057919:Biological Oxygen Demand Analysis; D015374:Biosensing Techniques / Q000295:instrumentation*; D004867:Equipment Design; D019216:Metals, Heavy / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D019216:Metals, Heavy; D014874:Water Pollutants, Chemical