[Photodegradation of phthalic acid esters in water].
OBJECTIVE
To investigate the environmental degradation process of phthalic acid esters (PAEs).


METHODS
The PAEs were detected by HPLC. We used the system of ultraviolet light, TiO2 and hydrogen peroxide to promote the photodegradation of PAEs in water.


RESULTS
The photodegradation of PAEs was consistent with the first level kinetics. The maximal photodegradation of PAEs occurred at the 2.0 g/L of TiO2, pH 6.0, and 2.0% of H2O2. The importance of these environmental factors in promoting the photodegradation of PAEs were in the following orders: initial concentration of PAEs, radiation time, pH value, concentration of H2O2, and concentration of TiO2.


CONCLUSIONS
The system of ultraviolet light, TiO2 and hydrogen peroxide was effective in promoting the photodegradation of PAEs.
Hu
Xiaoyu
X
Department of Sanitary Technology, West China School of Public Health, Sichuan University, Chengdu 610041, China.
Zhang
Kerong
K
Zheng
Bo
B
Wu
Desheng
D
D004952:Esters; D006861:Hydrogen Peroxide; D007700:Kinetics; D010777:Photochemistry; D010782:Photolysis; D010795:Phthalic Acids / Q000737:chemistry*; D013472:Sunlight; D014025:Titanium / Q000737:chemistry; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
D004952:Esters; D010795:Phthalic Acids; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; C032279:phthalic acid; D006861:Hydrogen Peroxide; D014025:Titanium