科研之友
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摘要
In this paper, a process combining stainless steel membrane and UV/TiO(2) is developed to degrade DDT in water. The photocatalyst TiO(2) was deposited on a kind of glass cenospheres whose diameters ranged from 20 to 200 mu m, so they could be kept in the reactor by microfiltration membrane. The influence of different variables (TiO(2) concentration, radiation) on the reaction rate was tested. According to the experiment, the removal was mainly caused by adsorption during the early stages of the reaction and mainly by UV/TiO(2) degradation in the later stages. Three sample solutions with DDT concentrations: C(o) = 30, 40 and 50 mu g/L, were treated in the reactor and the removal rate of DDT was found to be 98.3%, 97.8% and 97.6%, respectively. Adequate dosage of the catalyst increased the generation rate of electron/hole pairs which promoted the formation of OH radicals for enhancing photodegradation.
- 出版日期2010-9
- 单位同济大学
