光催化降解染料废水的研究现状及展望

The Current Situation and Prospects of Photocatalytic Degradation for Dye-containing 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。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;在各式的反应器中,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。

Metal oxides are generally used as catalysts in research on the photocatalytic degradation of dye-containing wastewater; among these, TiO2 is most nearly ideal. Various carrying methods for catalysts are available, and the sol-gel method has the potential for application. During the process of catalytic oxidation, factors such as the amounts of catalyst required, pH value and initial concentration of wastewater, temperature, light intensity and light source affect the oxidation results. Among the various reactors, the tube reactor was thought to have the most potential. In order to successfully industrialize this technology, problems such as the activity of catalysts, catalyst carrying techniques, reactor design, etc. have to be solved.