The effects of Cu(Ⅱ） or Zn（Ⅱ） on the photo-catalytic degradation of some organic chemicals in water,such as acetone,phenol,dyes,and tea saponin were studied.Dyes in wastewater from a textile factory can be effectively degraded by photo-catalysis with TiO2 and ultraviolet light or sunshine,but the reaction rate could be slowed down if copper or zinc salt exists in the solution.

完成机构：[1]CollegeofChemistryandChemicalEngineering,CentralSouthUniversity,Changsha410083,China [2]ShenzhenMonitoringStationforEnvironmentalProtection,Shenzhen518001,China

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