碳基材料电芬顿降解污染物的研究进展

Research progress of carbon-based materials for electro-Fenton degradation of pollutants

电芬顿法是处理水中有机污染物的简便有效方法之一.碳材料是阴极电化学过程中二电子还原O_(2)原位生成H_(2)O_(2)的有效电极,在电芬顿催化剂作用下, H_(2)O_(2)可进一步分解产生强氧化性羟基自由基以快速矿化有机污染物.本综述基于碳基电极主要电芬顿过程的分析,从强化O_(2)传质和Fenton反应两个方面系统论述各类碳基电极材料的改性方法,并进一步论述碳基电极电芬顿去除有机污染物的应用及经济成本分析.基于此,提出目前碳基电极材料的发展趋势及其在电芬顿控制污染物领域的未来研究方向.

Electro-Fenton process is one of the simple and effective methods for the treatment of organic pollutants in water. Carbon-based material serves as a robust cathode for in-situ formation of H_(2)O_(2) via the two-electron O_(2) reduction reaction. With the help of electro-Fenton catalysts, the generated H_(2)O_(2) decomposed into strong oxidizing hydroxyl radicals for efficient mineralization of organic pollutants. Based on the analysis of the main electro-Fenton processes on carbon-based materials, this review systematically summarizes the modification of various carbon-based electrode in an attempt to enhance O_(2) mass transfer and Fenton reaction. Moreover, the practical application and economic cost of carbon-based electrode in electro-Fenton degradation of organic pollutants are described. Finally, the current development trend of carbon-based electrode materials and foreseeable future research direction in the field of electroFenton pollution control are pointed out.