负载型TiO_2光催化在污水处理中的应用

近年来,各地水污染事件频发,用水安全问题得不到保障,水污染治理形势严峻,人们的健康受到了严重的威胁。常规的水处理工艺处理对成分复杂、生化性差的污水处理效果不佳,严重影响了人们用水的安全性。TiO_2光催化技术作为一种绿色节能的技术,在水处理方面得到广泛的研究,但是悬浮态的TiO_2具有易流失、难以回收、易团聚等缺点,因此负载型的TiO_2催化系统已成为当前光催化剂研究的热点方向。对TiO_2负载载体的类型及其优缺点、负载方法进行了总结,简要阐述了负载型TiO_2在水处理的应用,并展望了负载型TiO_2的发展前景。

Supported TiO_2 photocatalysis and its application in wastewater treatment

Recently, there have been frequent water pollution incidents all over the world. Water pollution control has been grim, and people’s health has been seriously threatened. It’s hard to degrade sewage of complex components and low biodegradability by conventional water treatment process, which seriously affects the safety of water’s usage. Titanium dioxide (TiO2) photocatalysis is an environment-friendly and energy-saving technology, and has been widely studied in wastewater treatment. However, the utilization of TiO2 powder in suspension has the disadvantages of easy leaching, difficult recovery and easy agglomeration. The aim of this paper is to provide a thorough review of the types of supported TiO2 system, including its supporting skeleton and loading methods, and the application of the supported TiO 2 photocatalysis in wastewater treatment has also been described. The prospect the development of supported TiO2 was also proposed.