Advanced oxidation of biorefractory organics in aqueous solution together with bioelectricity generation by microbial fuel cells with composite FO/GPEs

2017 International Conference on Renewable Energy and Environment

能源学;生态环境科学

Fu, Bao-Rong^1 ; Shen, Chao^1 ; Ren, Jing^1 ; Chen, Jia-Yi^2 ; Zhao, Lin^2

School of Environment Science, Liaoning University, Shenyang

110036, China^1

Department of Environmental Science and Engineering, Tianjin University, Tianjin

300072, China^2

关键词: Advanced oxidation;    Catalytic efficiencies;    Composite cathode;    Electricity generation;    Graphite particles;    Oxidation activities;    P-nitrophenol degradation;    Three-dimensional electrode;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/127/1/012015/pdf
DOI  :  10.1088/1755-1315/127/1/012015

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this study, ferric oxide loading graphite particle electrodes (FO/GPEs) were prepared as cathode of a three-dimensional electrode MFC-Fenton system. The properties of the composite cathode were examined with higher surface area and more mesopores. FO/GPEs could work as both cathode and Fenton iron reagents, contributing to high oxidation activity and better performance of electricity generation. The application of FO/GPEs MFC-Fenton system on degrading p-nitrophenol presented high catalytic efficiency in a wide range of pH value. The removal of p-nitrophenol and TOC attained to about 85 % within 8 and 64 h at neutral pH, respectively. A neutral FO/GPEs MFC-Fenton oxidation mechanism was also proposed. Specifically, both the surface iron sites and dissolved iron ions catalyzed the decomposition of H2O2. As results, the generated hydroxyl radicals were used for p-nitrophenol degradation and the iron oxide was recycled.