Abstract：The composite electrodes were proved to be able to improve the in-situ production capacity of H2O2 in the electro-Fenton system, enhancing the efficiency of degrading dye wastewater. In this paper, the performance impacts of two composite electrodes, Fe/OC-OATC and Fe/PC, on the electro-Fenton system were investigated. We first pre-processed the electrodes with octanecyl trimethyl ammonium chloride(OATC) and phosphoric acid, then the iron was loaded on the carbon cloth to fabricate the Fe/OC-OATC electrode and Fe/PC electrode. The electrochemical properties of the two composite electrodes were analyzed through polarization curves, power density curves and cyclic voltammetry curves. The results indicated that the Fe/OC-OATC electrode had better performance in the current density, maximum power density and oxygen reduction ability tests than the Fe/PC electrode. The maximum power density of Fe/OC-OATC was 4.89W/m3, and its corresponding current density could reach 22.9A/m3. Subsequently, the effects of the bioelectric Fenton systems with Fe/OC-OATC and Fe/PC electrode were also explored in the procedure of Rhodamine B degradation. The results revealed that the Fe/OC-OATC system had a higher Rhodamine B removal rate of 96.4% than the Fe/PC system. Finally, the degradation mechanism of Rhodamine B in the two systems were investigated with the kinetic analysis and reaction mechanism analysis.
杜茂华, 李皓芯, 任婧, 赵焕, 张籍月, 宋有涛. 改性阴极生物电芬顿系统降解罗丹明B[J]. 中国环境科学, 2021, 41(4): 1681-1688.
DU Mao-hua, LI Hao-xin, RENG jing, ZHAO huan, ZHANG Ji-yue, SONG You-tao. Electricity production and Rhodation B degradation in bioelectric fenton system with modified cathode. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(4): 1681-1688.
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