基于空气阴极的微生物燃料电池处理含铬(Ⅵ)废水  

Treating Wastewater Contained Cr(Ⅵ) Based on the Microbial Fuel Cell with an Air-Cathode

作　　者：金春姬[1,2] 王朋远 于辉[1] 李方[1] 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2015年第5期69-74,共6页Periodical of Ocean University of China

基　　金：山东省自然科学基金项目(ZR2011BM014)资助

摘　　要：本文构造碳布阳极、光谱纯(SPG)石墨板阴极的双室微生物燃料电池(MFC),向阴极曝气建立空气阴极体系,在此基础上考察其对含铬(Ⅵ)废水的去除效率及其产电性能。结果表明,铬(Ⅵ)初始浓度一定时,铬(Ⅵ)的去除效率和电池的最大输出功率都随着pH值的降低而升高,在pH=2时获得最佳的处理效果和产电性能,初始浓度为50mg/L的铬(Ⅵ)经过50h的处理后,去除率达到100%,同时获得的最大功率密度达568.43mW/m2;保持最佳的pH条件(pH=2),铬(Ⅵ)的初始浓度由10mg/L增加到100mg/L时,铬(Ⅵ)转化去除所需要的时间由10h上升到90h,最大功率密度也由156.06mW/m2增加到705.33mW/m2;通过氮气阴极与空气阴极的对比,空气阴极不仅能加快铬(Ⅵ)的去除效率(提高约20%)而且能增大系统的最大功率密度,从而提高MFC的产电性能。The dual-chamber microbial fuel cell （MFC） with an air-cathode was employed to investigate the treatment of wastewater containing chromium （Ⅵ） and the power generation characteristics, which was structured carbon cloth as anode and spectrographic pure graphite （SPG） plate as cathode. The results showed that both the removal efficiency and the maximum power density increased with reducing pH when the initial concentration kept the same value. The best performance had been obtained when the value of pH reached 2, the removal rate of 50 mg/L chromium （Ⅵ） could get 100% after 50 hours of disposal, and achieve the maximum power density of 568.43 mW/m2. Standing on the optimum pH= 2, as the initial concentration of chromium （Ⅵ）ascended from 10 to 100 mg/L, the processing time of removing chromi- um （Ⅵ） completely required from 10h up to 90h, the power density rose from 156.06 mW/m2 to 705.33 mW/m2. By contrast with N2-cathode, air-cathode could not only accelerate the removal efficiency （about 20%） of chromium （Ⅵ） but also improve the power density, which namely enhanced the power generation performance of the MFC.

关 键 词：微生物燃料电池 空气阴极 铬(Ⅵ)去除 产电性能 

分 类 号：X703.1[环境科学与工程—环境工程]