改性阴极生物电芬顿系统降解罗丹明B

分别采用十八烷基三甲基氯化铵（OATC）和磷酸改性电极并负载铁涂覆在碳布表面，制得Fe/OC-OATC电极和Fe/PC电极用于构建生物电芬顿系统，提高电芬顿技术中H₂O₂的原位生产能力，达到高效降解印染废水的目的.通过极化曲线、功率密度曲线以及循环伏安曲线对2种复合电极的电化学性质进行分析，结果表明，Fe/OC-OATC的电流密度、最大功率密度以及氧还原能力等均优于Fe/PC，最大功率密度为4.89W/m³，相应的电流密度可达22.9A/m³.然后探究了2种复合电极构建的生物电芬顿系统对罗丹明B的降解效果，结果显示，Fe/OC-OATC体系﹥ Fe/PC体系，Fe/OC-OATC体系对罗丹明B的去除率最高达96.4%.最后根据动力学分析和反应机理的研究，分析了2种系统对罗丹明B的降解机理.

Electricity production and Rhodation B degradation in bioelectric fenton system with modified cathode

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.