Comparison of photochemical oxidation of diethyl phthalate by UV/H2O2 and UV/TiO2/glass films in aqueous solution
The decomposition of diethyl phthalate (DEP) has been carried out in UV/H2O2 and UV/TiO2/glass films process separately. The effects of reaction pH, applied H2O2 dose and initial concentration of DEP have been studied. The optimal conditions at an initial DEP concentration of 20 mg.L-1 were acidic and 15mmol.L-1 H2O2 in UV/H2O2 system, and pH3.0 in UV/TiO2/glass films system under 254nm UV irradiation. Under the optimal conditions, DEP photodegradation during the initial period of 60 min in UV/H2O2 and UV/TiO2/glass films systems reached 97 and 49%, respectively. In both systems, DEP photodegradation decreased with increasing initial concentration of DEP. While DEP photodegradation rates increased with increasing dosage of H2O2 (5-15 mmol.L-1), further increase in the dosage of H2O2 (20mmol.L-1) adversely reduced the DEP photodegradation. Pseudo first-order kinetics with regard to DEP concentration can be used to describe the DEP photodegradation in both systems.
De-Qiang Chen Dai-Ming Zhang
Hohai University, College of Environmental Science & Engineering Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Nanjing, China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）