TiO2在光照下分解有机污水的研究

THE PHOTO-DEGRADATION OF ORGANICS IN WASTE WATER WITH CATALYSIS OF TITANIUM DIOXIDE

利用ＴｉＯ２的光氧化催化作用，对有机污水中的有机物，特别是各类芳香烃的光降解过程进行了研究。ＴｉＯ２对芳烃的降解速度随着芳环数的增加而降低，ｐＨ为３～９时，光解活性最高，ＴｉＯ２焙烧掺杂后其光降解活性可大幅度提高，在脱色方面优于生化方法。研究结果表明，ＴｉＯ２光降解处理污水技术可作为生化处理的补充手段，对较难生化的有机物进行降解，可提高污水的处理质量。

A photo-degradation process was studied in degradation of organics containedwaste water on TiO2 powder, especially in degradation of varies of aqueous armatics.Theresults show that the photo-degradation rate of aromatics on irradiated TiO2 was decreasing withincrease of aromatic cycles,The activity of phto-degradation of aromatics on calcined anddoped TiO2 can be raised greatly.The process was better than biodegradation in decolorationof waste water.The results also revealed that a photo-degradation process can be used as asupplemental method of waste water treatment。