摘要
有机消毒副产物给饮用水安全带来严重威胁。高级还原技术(ARPs)对有机消毒副产物具有良好的去除效果及较宽的pH值适用范围,受到了广泛关注。综述了ARPs去除有机消毒副产物的效能,指出其机理为还原剂经活化后产生还原能力极强的还原性自由基,攻击有机消毒副产物的碳卤键或其他不饱和键,从而实现对DBPs的去除。同时分析了该技术的重要影响因素,包括pH值、还原剂浓度、光源强度、天然有机物、共存离子和溶解氧等对DBPs去除效果的影响,探讨了该技术的现存缺陷,展望了ARPs体系去除有机消毒副产物的发展趋势,以期促进ARPs的应用。
Organic disinfection by-products pose a serious threat to drinking water safety.Advanced reduction processes(ARPs)based on reducing free radicals have received widespread attention in China and abroad because of their highly efficient degradation of organic disinfection by-products and more stable performance over a wide pH range.This review describes the effectiveness of ARPs for the degradation of organic disinfection by-products.It is pointed out that the mechanism is that the reducing agent generates reductive free radicals with strong reducing ability after activation,and the reductive free radicals attack the carbon halide bonds or other unsaturated bonds of the organic disinfection by-products,thereby removing the organic disinfection by-products.The critical factors were further discussed,including solution pH,reductant concentrations,light intensity,the presence of natural organic matter and coexisting ions,as well as dissolved oxygen.Finally,the existing problems of the technology and the probable development trend of degradation of organic disinfection by-products by ARPs was summarized in order to promote the development of ARPs.
作者
段钰汀
于水利
肖倩
DUAN Yu-ting;YU Shui-li;XIAO Qian(State Key Laboratory of Pollution Control and Resource Reuse,School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2022年第6期38-43,共6页
China Water & Wastewater
基金
国家自然科学基金资助项目(51978484)。
关键词
饮用水
高级还原
还原性自由基
消毒副产物
drinking water
advanced reduction
reducing free radicals
disinfection by-products
