聚中性红修饰电极对微生物燃料电池(MFC)脱氮产电性能的影响  

Effect on denitrification and electricity generation in microbial fuel cells (MFC) by poly-neutral red modified electrode

作　　者：章静 赵丝蒙 周昱宏[1] 史惠祥[1] ZHANG Jing;ZHAO Simeng;ZHOU Yuhong;SHI Huixiang(Department of Environmental and Resource,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学环境与资源学院

出　　处：《浙江大学学报（理学版）》2019年第5期589-599,共11页Journal of Zhejiang University（Science Edition）

基　　金：国家科技重大专项(2017ZX07206-002)

摘　　要：利用电聚合方法制备了聚中性红修饰电极,通过扫描电子显微镜(SEM)、能谱仪(EDS)、傅里叶变换红外光谱(F TIR)等表征手段对电极材料的微观结构与组成进行研究。为进一步考察聚中性红修饰电极对微生物燃料电池(M FC)脱氮产电性能的影响,构建了各种不同微生物燃料电池。实验表明,聚中性红修饰阴极微生物燃料电池(C PNR-MFC)具有最强的脱氮和产电性能,其次为聚中性红修饰阳极微生物燃料电池(A PNR-MFC)。在不同进水硝氮浓度下,实验组MFCs对硝氮的去除率均达到90%以上,CPNR-MFC具有0.040 kg m-3 d-1的最大硝氮去除速率和15.29W m-3的最大功率密度,较对照组分别提高14.29%和82.51%,而APNR-MFC仅分别提高5.71%和31.93%。通过对比MFCs的电化学特性和微生物特征,探究了聚中性红修饰电极对MFCs性能影响的机理。The poly-neutral red modified electrode was prepared by electropolymerization method.The microstructure and composition of the electrode material were studied by means of scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS)and Fourier transform infrared spectroscopy(FTIR).In order to further investigate the effect of poly-neutral red modified electrode on the denitrification and electricity generation of microbial fuel cell(MFC),different microbial fuel cells were constructed.The results indicate that MFC with PNR modified cathode(CPNR-MFC)has the best denitrification and electricity generation abilities,followed by MFC with PNR modified anode(APNR-MFC).Under different influent nitrate concentrations,the removal rate of nitrate from all experimental group MFCs reached above 90%.CPNR-MFC had the maximum nitrate degradation rate of 0.040 kg m-3 d-1 and the maximum power density of 15.29 W m-3,which was 14.29%and 82.51%higher than C-MFC,while APNR-MFC only raised 5.71%and 31.93%,respectively.By comparing the electrochemical properties and microbial characteristics of MFCs,the mechanism of the effect of poly-neutral red modified electrodes on the performance of MFCs was investigated.

关 键 词：微生物燃料电池(MFC) 反硝化 电子传递效率 聚中性红 

分 类 号：X523[环境科学与工程—环境工程]