Zhu Ting-Jun, Lin Chi-Wen, Liu Shu-Hui
Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin, 64002, Taiwan, ROC.
Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin, 64002, Taiwan, ROC; Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology, Yunlin, 64002, Taiwan, ROC.
Chemosphere. 2023 Apr;320:138082. doi: 10.1016/j.chemosphere.2023.138082. Epub 2023 Feb 8.
Polycarbonate plastic processing wastewater contains high concentrations of bisphenol A (BPA), requiring a real-time technology to monitor wastewater containing BPA. Since the activity of electrogenic microorganisms on the anode surface of the microbial fuel cell (MFC) sensor is inhibited by exposure to contaminants, the toxicity of contaminants in wastewater can be determined by observing the variation in voltage output from the MFC sensor. The simple MFC sensor that is developed in this work exhibited a significant decrease in voltage output in BPA-containing wastewater concentration of 5-100 mg/L. Sensitivity analysis revealed that the voltage change (ΔV) was strongly correlated with the BPA concentration, with R as high as 0.97. This study was the first to investigate the number of repeated uses of the MFC sensor, using sodium acetate as the regeneration solution for the MFC sensor, leading to a successful recovery of detection performance. However, as the number of uses increased (up to the third or fourth use), the ΔV of the MFC sensor for BPA gradually decreased and the sensitivity decreased significantly from 0.238 mV/mg/L to 0.027 mV/mg/L. In the low BPA concentration range (≦20 mg/L), the MFC sensor can be reused up to 5 times, demonstrating that the proposed MFC sensor can be reused. Microorganisms contribute to the power generation of the MFC sensor, which can be exploited in the detection of pollutants, enabling the determination of wastewater toxicity and providing early warnings of thereof. Conventional MFC sensors are complex and lack the ability to explore repeated use, so they are not easily applied to actual wastewater detection. The proposed MFC sensor has many advantages such as simplicity, rapid detection, and reusability, solving the problem of the high cost of using disposable MFC sensors and making them feasible for practical use.
聚碳酸酯塑料加工废水含有高浓度的双酚A（BPA），需要一种实时技术来监测含BPA的废水。由于微生物燃料电池（MFC）传感器阳极表面的产电微生物活性会因接触污染物而受到抑制，因此可通过观察MFC传感器电压输出的变化来确定废水中污染物的毒性。本研究开发的简易MFC传感器在含5 - 100 mg/L BPA的废水环境中，其电压输出显著下降。敏感性分析表明，电压变化（ΔV）与BPA浓度密切相关，相关系数R高达0.97。本研究首次探究了MFC传感器的重复使用次数，使用醋酸钠作为MFC传感器的再生溶液，成功恢复了检测性能。然而，随着使用次数增加（最多到第三次或第四次使用），MFC传感器对BPA的ΔV逐渐降低，灵敏度从0.238 mV/mg/L显著降至0.027 mV/mg/L。在低BPA浓度范围（≦20 mg/L）内，MFC传感器可重复使用多达5次，表明所提出的MFC传感器具有可重复使用性。微生物有助于MFC传感器发电，可用于污染物检测，从而能够确定废水毒性并提供早期预警。传统的MFC传感器结构复杂且缺乏对重复使用的探索能力，因此不易应用于实际废水检测。所提出的MFC传感器具有简单、检测快速和可重复使用等诸多优点，解决了使用一次性MFC传感器成本高昂的问题，使其在实际应用中具有可行性。
