掺硼金刚石膜电极电化学氧化过程中含氯副产物的生成机理研究

项目名称： 掺硼金刚石膜电极电化学氧化过程中含氯副产物的生成机理研究

项目编号： No.51308537

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 建筑科学

项目作者： 李红娜

作者单位： 中国农业科学院农业环境与可持续发展研究所

项目金额： 25万元

中文摘要： 以掺硼金刚石膜（Boron-doped Diamond, BDD）电极为阳极的电化学氧化对难降解有机物具有优异的处理效果，然而水体中的氯离子经电化学氧化会生成有毒的含氯副产物，其生成机制和影响因素还少有研究。本项目拟以BDD电极电化学氧化模拟微污染水源水，通过多种因素对电化学过程中三氯甲烷、氯酸盐、高氯酸盐等含氯副产物的种类和数量的影响研究，建立该体系中含氯副产物生成的相关因素分析；并进一步探讨BDD电极电化学氧化过程中含氯副产物的生成机理，明确电解产生的活性氧和活性氯的间接氧化以及电化学直接氧化的作用机制，通过与常规的铂电极对比，进一步阐述直接氧化与间接氧化对副产物生成的分配；在此基础上提出控制方法，以期为电化学氧化对微污染水源水中难降解有机物的安全处理提供理论依据，为电极材料的选择和副产物的控制提供技术指导。

中文关键词： 掺硼金刚石摸电极；双酚A；电化学氧化；氯代副产物；羟基自由基

英文摘要： As a new and environmental-friendly technology, electrochemical oxidation with boron-doped diamond (BDD) anodes can effectively degrade the persistent pollutants in micro-polluted source water. However, chloride in natural waters would be transformed to unpleasant chloride-containing byproducts during the treatment and there were few studies on the formation mechanisms and influencing factors of these byproducts. This project intends to investigate the formation mechanisms of the chloride-containing byproducts (chloroform, chlorate and perchlorate) in electrochemical oxidation of simulated micro-polluted source water. The multi-factors analysis will be created based on the results of byproducts formation under different influencing factors. Then, the concrete mechansims of the indirect oxidation by electrogenerated active oxygen and active chlorine, as well as the direct electrochemical oxidation will be investigated; the roles of direct/indirect electrochemical oxidation played on these byproducts formation are revealed at BDD anodes in comparison with that for Pt anodes. Finally, control measures are put forward according to the optimized reaction factors. This project will provide a theoretical foundation for the safe and practical application of electrochemical oxidation technology in micro-polluted source w

英文关键词： Boron-doped diamond；bisphenol A；electrochemical oxidation；chlorinated byproducts；hydroxyl radicals