印染废水的光催化氧化研究现状及其进展

Present Situation and Development of Photocatalytic Oxidation Treatment for Dyeing Wastewater

在光催化氧化法降解染料废水的研究中,通常使用金属氧化物为催化剂,其中TiO2最为理想;催化负载方式很多,以溶胶-凝胶法更具应用前景;同时,催化氧化过程中的催化剂的用量、废水的pH值和初始浓度、温度、光照强度和光源类型等因素对氧化效果有着不同程度的影响;在各式反应器中,管式反应器被认为最具有发展前景。要使这项技术成功走向工业化,必须解决好催化剂的活性、负载技术和反应器设计等方面的问题。

In the research of degrading dyeing wastewater by photocatalytic oxidation, the metal oxide is usually used as the catalyst, for example TiO2 is the ideal one; there are many catalytic loading ways, especially Sol - Gel method is prospected; meanwhile the dosage of catalyst, pH value, initial concentration, temperature, light intensity and types of light sourcs and other factors have different effects on oxidation degree in the catalytic oxidation process; the pipe reactor is considered the most pwspected one. To make this technology industrilized, such problems should be solved as the catalytic activity, load technology, reactor design, and so on.