文献类型：期刊文献

中文题名：外电阻对MFC型生物毒性检测器性能的影响

英文题名：Effect of external resistance on performance of biological toxicity detector based on microbial fuel cells

作者：常定明[1];卢智昊[1];吴陈巍[1];陈瑶[1];蔡兰坤[1];张乐华[1]

机构：[1]华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海200237

年份：2015

卷号：9

期号：10

起止页码：5113

中文期刊名：环境工程学报

外文期刊名：Chinese Journal of Environmental Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金资助项目(20906026);上海市浦江人才计划项目(09PJ1402900)

语种：中文

中文关键词：微生物燃料电池;外电阻;抑制率;响应时间;稳定性

外文关键词：microbial fuel cells;external resistance;inhibition rate;response time;stability

摘要：利用微生物燃料电池对含汞废水的生物毒性进行检测,结果表明,汞等重金属有毒物质会对阳极产电细菌的活性有一定抑制作用。汞浓度在0.5~5.0 mg/L范围内,其抑制作用的大小与重金属的浓度呈正相关;外电阻为25~35Ω条件下,最低检测限为0.5 mg/L,最大抑制率为21.74%;外电阻越小,微生物燃料电池检测生物毒性的灵敏度也越高,响应时间越短,检测限越小。然而,外电阻太小,不利于微生物燃料电池的长期稳定运行。因此,微生物燃料电池检测生物毒性时,最佳外电阻选择范围为0.5 R内~0.7R内。
The biological toxicity of mercury-containing wastewater was assayed by a microbial fuel cell(MFC)-based biosensor,and the results showed that the activity of electricigens in MFCs was inhibited by the heavy metals such as mercury.The inhibition rate and heavy metal concentrations rising from 0.5 to 5.0 mg/L were positively correlated.The minimum detection limit was 0.5 mg/L while the maximum inhibition rate was21.74%when the MFCs were with a external resistance of 25—35Ω.The sensitivity of MFC-based biosensor was improved and its response time as well as minimum detection limit was reduced when the MFC-based biosensor was with a smaller external resistance.However the small external resistance is detrimental to the stability of MFCs.The optimal external resistance of the MFC-based biosensor for testing the toxicity was within 0.5 Rinand 0.7 Rin.