水中邻苯二甲酸酯的光降解
[Photodegradation of phthalic acid esters in water].
作者信息
Hu Xiaoyu, Zhang Kerong, Zheng Bo, Wu Desheng
机构信息
Department of Sanitary Technology, West China School of Public Health, Sichuan University, Chengdu 610041, China.
出版信息
Sichuan Da Xue Xue Bao Yi Xue Ban. 2003 Apr;34(2):300-2, 305.
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.
CONCLUSION
The system of ultraviolet light, TiO2 and hydrogen peroxide was effective in promoting the photodegradation of PAEs.
目的
研究邻苯二甲酸酯（PAEs）的环境降解过程。
方法
采用高效液相色谱法检测PAEs。利用紫外光、二氧化钛和过氧化氢体系促进水中PAEs的光降解。
结果
PAEs的光降解符合一级动力学。PAEs在二氧化钛浓度为2.0 g/L、pH值为6.0、过氧化氢浓度为2.0%时光降解率最高。这些环境因素对促进PAEs光降解的重要性顺序为：PAEs初始浓度、辐射时间、pH值、过氧化氢浓度、二氧化钛浓度。
结论
紫外光、二氧化钛和过氧化氢体系能有效促进PAEs的光降解。
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