PRELIMINARY STUDY ON IMMOBILIZATION TECHNOLOGY OF TIO2 PHOTO CATALYST

Yang Zhao-xu, Zhang Jing-jing, Duan Cheng-long, Chen Chen, Gong Yan, Li Ying-hua

ABSTRACT:TiO2 was used as photo catalyst to treat organic effluent firstly. Methyl orange solution was utilized as simulated wastewater for optimizing conditions of the reaction. That is: reaction time as 60min, solution concentration as 50mg/L, and amount of catalyst as 0.02g. TiO2 was then immobilized on diatomite (so-called TiO2/diatomite composite materials) for treatment of organic effluent. The reaction mechanism was studied. The results showed that TiO2 played as a good photocatalyst，diatomite possessed a certain adsorption capacity for methyl orange removal. The removal rate of 100% for advanced treatment of actual organic wastewater was obtained by using this composite material.

Keywords:TiO2, immobilization, diatomite, composite material, photocatalysis.