Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
Bioresour Technol. 2021 Apr;326:124743. doi: 10.1016/j.biortech.2021.124743. Epub 2021 Jan 20.
The development of low-cost biosensors for water monitoring is expected to reduce potential risks from contamination accidents. This study reported a novel micro-microbial electrochemical sensor using combined bioanode and biocathode as the sensing element, characterized by a sequential flowing membrane-free channel and a bilateral passive oxygen supply. A decrease in the ratio of number of bioanode to biocathode resulted in a lower power generation, whereas, achieving a similar or even higher toxic response. The voltage was affected by both the flow rate and the acetate concentration. With the increased acetate concentration, a clear trade-off was observed between the electroactivity stimulation of bioanode vs. the electroactivity maintenance of biocathode. Biosensors made good response to the injection of formaldehyde (10 µL of 0.25%, and 100 µL of 0.025%) into the inlet. A high microbial diversity was observed. This work can lead to a revolutionizing way of water monitoring using self-powered micro-biosensors.
低成本生物传感器用于水质监测的发展有望降低污染事故带来的潜在风险。本研究报道了一种新型微生物电化学传感器，采用组合生物阳极和生物阴极作为传感元件，具有顺序流动无膜通道和双侧被动供氧的特点。生物阳极与生物阴极数量之比的降低会导致发电能力降低，但却能实现类似甚至更高的毒性响应。电压受流速和乙酸盐浓度的双重影响。随着乙酸盐浓度的增加，生物阳极的电活性刺激与生物阴极的电活性维持之间观察到明显的权衡。传感器对甲醛（10μL 的 0.25%和 100μL 的 0.025%）注入入口有良好的响应。观察到微生物多样性很高。这项工作可以引领使用自供电微生物传感器进行水质监测的革命化方式。
