附着态TiO_2光降解可溶性染料的研究

研究了以黄砂为载体、TiO2为催化剂，在铁离子存在的条件下．以直管高压汞灯为光源．用模拟工业浅池的光反应器，对有机染料酸性玫瑰红B和晒化绿B进行光催化降解的可行性。结果表明，在实验条件下，本系统对以上染料有显著的光降解作用。浓度为25mg／L．的上述2种染料溶液，经30min光照，其降解率分别达92．4％和91．3％。此外，还探讨了铁离子浓度、染料浓度、染料体积、染料溶液pH值等因素对光降解的影响。

Photocatalytic Degradation of Soluble Dyes In Water Using Immobilized Titania

The Photocatalytic degradation of soluble dyes Acid Rose Red B and Shangdacid Green B has beenstudied in geometries simulating shallow ponds. The photocatalyst was titanium dioxide immobilized on sandand Fe2+. It shows that the dyes were remarkablely photolized under the condition of the experiment. Theinitial concentrations of 25 ml/L of Acid Rose Red B and Shangdacid Green B decayed to 1.9 mg/L and 2. 2mg/L respectvely in about 30 min of irradiation. The influence of parameters such as initial concentrations andPH of the byEs,the concentration of Fez+ and the volumes of the dyes has been studied.