State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100875, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Ecotoxicol Environ Saf. 2019 Nov 15;183:109589. doi: 10.1016/j.ecoenv.2019.109589. Epub 2019 Aug 26.
A microbial fuel cell (MFC) was successfully developed as a toxicity biomonitoring system to enable a quick response to wastewater with unknown toxicity in toxic events. The objective was to quantitatively assess the toxicity of wastewater by a rapid method. Different concentrations of formaldehyde were introduced into the anode chamber, which led to different stages of voltage change. A relationship between the linear slope of the voltage drop stage and the formaldehyde concentration was established through dose-response fitting results. This relationship makes it possible to convert an unknown toxicity of wastewater into the equivalent concentration of formaldehyde. The minimum detection limit in this study was 13 mg/L formaldehyde equivalents. As the toxicity of the wastewater increased, the test time could be reduced to as low as 921 s or even shorter, with a detection error of 3-12 mg/L. By using this evaluation method, oxidized tail gas scrubber wastewater was identified as the main toxic wastewater component in a phenol acetone production plant.
成功开发了一种微生物燃料电池（MFC）作为毒性生物监测系统，以便在有毒事件中快速应对未知毒性的废水。目的是通过快速方法定量评估废水的毒性。不同浓度的甲醛被引入阳极室，导致电压变化的不同阶段。通过剂量-反应拟合结果，建立了电压下降阶段线性斜率与甲醛浓度之间的关系。这种关系使得将未知毒性的废水转化为甲醛的等效浓度成为可能。本研究的最低检测限为 13mg/L 甲醛当量。随着废水毒性的增加，测试时间可以缩短至低至 921s，甚至更短，检测误差为 3-12mg/L。通过使用这种评价方法，鉴定出在苯酚丙酮生产厂中，氧化尾气洗涤塔废水是主要的有毒废水成分。
