AC/PTFE微生物燃料电池阴极去除罗丹明B及同步产电性能  

Simultaneous removal of Rhodamine B and electricity generation in microbial fuel cell with AC/PTFE cathode

作　　者：唐超[1] 孙哲[1] 陈东辉[1] 黄满红[1] 郑伟[1] 廖玲芝[2] 蔡群 TANG Chao SUN Zhe CHEN DongHui HUANG Manhong ZHENG Wei LIAO Lingzhi CAI Qun(College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China Environmental Monitoring Station of Huaihua city, Huaihua 418000,China Environmental Monitoring Station of Qingpu District, Shanghai 201700, China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]湖南省怀化市环境保护监测站,怀化418000 [3]上海市青浦区环境监测站,上海201700

出　　处：《环境工程学报》2016年第11期6165-6170,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21477018;21007010);交通运输部科技项目(2010353343290)

摘　　要：采用辊压成型法制备了活性炭(AC)/聚四氟乙烯(PTFE)质量比分别为6、5和3的AC/PTFE电极,并利用SEM对电极表面进行表征。结果表明,随着质量比的降低电极表面活性炭颗粒间的连接更为紧密。以制得的AC/PTFE电极,碳毡分别为微生物燃料电池(MFC)的阴极、阳极,利用AC/PTFE阴极在曝气条件下产生的过氧化氢在阴极处理模拟的罗丹明B废水。研究了不同质量比AC/PTFE阴极对罗丹明B的去除效果及同步产电情况,结果表明以AC/PTFE质量比为6的AC/PTFE阴极在96 h内对罗丹明B的去除率达到96%,MFC获得的最大功率密度为105 mW·m^(-2);同时研究了在阴极液加入0.2 g·L-1Fe^(2+)的条件下,阴极液为不同pH值时,阴极对罗丹明B的去除效果及MFC产电情况。结果表明在阴极液pH=3的情况下,罗丹明B的去除率在36 h内达到了98.9%,MFC的最大功率密度达到210 mW·m^(-2),罗丹明B的去除速率及MFC能量的输出得到了明显提高。An activated carbon / polytetrafluoroethylene（ AC / PTFE） electrode was prepared under pressure with mass ratios of 6 ∶ 1,5 ∶ 1,and 3 ∶ 1,and the resulting electrodes were characterized by scanning electron microscopy（ SEM）. The number of cross-linked electrode networks were reduced with an increase in AC / PTFE ratio. A two-chambered microbial fuel cell（ MFC） equipped with carbon felt anode and the as-prepared AC / PTFE cathode was constructed to treat Rhodamine B（ Rh B） in the cathodic chamber by reaction with hydrogen peroxide generated at the aerated AC / PTFE cathode. The simultaneous reaction / removal of Rh B and electricity generation of the MFC was studied using various AC / PTFE mass ratios. The Rh B decolorization efficiency reached96% over 96 h,and generated a maximum power density of 105 m W·m-2when the MFC was equipped with an AC / PTFE cathode with a mass ratio of 6 ∶ 1. The simultaneous reaction / removal of Rh B and MFC electricity generation was also studied with the addition of 0. 2 g ·L-1Fe2 ＋to the catholyte at different pH values. The Rh B decolorization efficiency reached 98. 9% over 36 h due to the bio-electro-Fenton reaction with a catholyte pH of 3. Under these conditions,the MFC generated a maximum power density of 210 m W·m-2,thus confirming that Rh B decolorization and MFC electricity generation improved significantly.

关 键 词：AC/PTFE复合电极 微生物燃料电池 过氧化氢 罗丹明B去除率 

分 类 号：X703.1[环境科学与工程—环境工程]