摘要
通过构建产电微生物-黄铁矿双室体系,应用电化学方法对以黄铁矿单晶电极作为产电微生物电子受体时,两者间的电子转移过程进行表征和分析.结果显示,与惰性石墨电极相比,以黄铁矿单晶作为产电微生物电子受体时,体系最大功率密度提升132.9%;电化学阻抗谱显示,黄铁矿单晶电极极化电阻降低98.8%,表现出优良的电化学反应特性,表明产电微生物与黄铁矿单晶间具有良好的电子转移活性.籍由产电微生物对底物的氧化作用,与黄铁矿单晶接受产电微生物电子在0.34V(相对于饱和甘汞电极)处发生的还原反应,构成了两者间完整的协同电子转移过程.
This research built up a dual-chambered electricigens-pyrite equipment.Using single crystal pyrite as electron acceptor of electricigens,and the electron transfer process was analyzed by electrochemical methods.Compared with graphite electrode,the maximum system power density increased by 132.9% and polarization resistance of EIS decreased by 98.8% with a single crystal pyrite electrode.The data show a favorable electron transfer activity between electricigens and single crystal pyrite.The electron transfer process is related to the two electrode reactions,of which one is microbial oxidation by electricigens,and the other is reduction at 0.34 V（vs.SCE） by single crystal pyrite as electron acceptor.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2012年第2期313-318,共6页
Earth Science-Journal of China University of Geosciences
基金
国家重点基础研究发展计划项目(No.2007CB815602)
关键词
黄铁矿
产电微生物
微生物还原
电化学
矿物学
环境工程
pyrite
electricigens
microbial reduction
electrochemisty
mineralogy
environmental engineering.
