Semiconductor Photocatalytic Oxidation Treatment Of Wastewater Applied Basic Research

Photocatalytic oxidation is one kind of waste treatment techniques to which people pay more and more attentions. The basic research treat the waste water by means of photocatalytic degradation has attained many achievements. But the research on the industry application has been not yet sufficient. This research was aimed at benefiting the development from laboratory reactor system for industrialization, and provided an embryo for the industrialization of photocatalytic oxidation. In this thesis, The basic research achievement concerning the photocatalytic oxidation of organic pollutants in water was reviewed, including the method of immobilization of catalyst and the advancement of photocatalytic reactor. The mechanism of the method of photocatalytic oxidation was also described. In this research, The photocatalytic degradation of dye-containing wastewater was investigated with a new type of open and rotating photocatalytic reactor using titanium dioxide as catalyst. From some important factors which may affect the photocatalytic degradation of the organic dye such as the initial concentration of the dye, pH value, the volume of the feed solution and the rotating rate of the reactor, the function of the reactor was investigated. To resolve the difficulty of separation of the suspended catalyst in the later stage of wastewater disposal, the method of the immobilized photocatalytic oxidation had been studied. The titanium dioxide was immobilized on glass using epoxy adhesive. We also treat the dye using both suspended titanium dioxide and titanium dioxide immobilized on glass with epoxy adhesive. The results showed that the photocatalytic degradation rate was very high when using photocatalyst of titanium oxidation film coating on the epoxy adhesive. After the irradiation about 4 hours, the rate of the photocatalytic degradation achieved more than 96%. The film can be used many 2 times. The catalytic activity would not drop. It is useful help to make the photocatalytic oxidation into industry application.