摘要
超声-光催化是一项近年发展起来的废水处理的新型高级氧化技术。该技术利用超声的空化效应、自由基效应以及机械效应强化光催化的催化效能,实现超声和光催化对水中有机污染物的协同降解,从而提高有机污染物的降解效率。超声-光催化技术简单、环境友好、适用范围广,显示了较好的发展潜力和应用前景。本文从水中有机污染物的超声-光催化降解机理、降解动力学、影响因素(光催化剂类型和投加量、超声频率和强度、溶液pH值、温度、反应物初始浓度、溶解性气体和离子强度)和反应器类型(悬浮型、固定床型)4个方面介绍了相关研究进展,提出了目前存在的主要问题,并展望了超声-光催化降解水中有机污染物的发展方向。
Sono-photocatalytic degradation of organic pollutants in wastewater is a newly developed advanced oxidation process （AOP）. In this process, the efficiency of photocatalysis is promoted by ultrasonic cavitation, freeradical and mechanical effects, and thus synergetic degradation of organic pollutants in wastewater is achieved. The sono-photocatalytic combined process displays a big potential because of its advantages such as simpleness, environmentally friendly and widely applications. In this paper, degradation mechanism, degradation kinetics, influence factors （the type and concentration of photocatalyst, ultrasonic frequency and intensity, pH values, temperature, initial concentration of organic pollutants, dissolved gas and ionic strength） and the type of reactor （suspension and fix bed） for the sono-photocatalytic combined process are reviewed. The main problems and the prospect of sono-photocatalytic combined process for wastewater treatment are presented.
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2008年第10期1621-1627,共7页
Progress in Chemistry
基金
国家高技术研究发展计划(863)项目(No.2006AA06Z323)
国家自然科学基金项目(No.50708007)
中国博士后科学基金项目(No.20070410039)资助
关键词
超声
光催化
有机污染物
降解机理
反应器
ultrasound
photocatalysis
organic pollutants
degradation mechanism
reactors
作者简介
通讯联系人e-mail：junfengn@bnu．edu．cn
