Chiou Chyow-San, Shie Je-Lueng, Chang Ching-Yuan, Liu Cheng-Chung, Chang Chang-Tang
Department of Environmental Engineering, National I-Lan University, 1, Sec. 1, Shen-Lung Road, I-Lan 260, Taiwan.
J Hazard Mater. 2006 Sep 21;137(2):1123-9. doi: 10.1016/j.jhazmat.2006.03.058. Epub 2006 Apr 15.
This study evaluated the performance of a photoreactor packed with TiO2/glass, TiO2 immobilized on glass beads, initiated by UV irradiation, denoted as UV/TiO2/glass, to decompose di-n-butyl phthalate (DBP) in an aqueous solution. The photodegradation rate of DBP by this UV/TiO2/glass process was found to obey pseudo first-order kinetics represented by the Langmuir-Hinshelwood model. The experimental results of this study show that the influence of pH value of an aqueous solution to reaction rate was negligible at the pH values 4.5-9. The effect of cations on the photodegradation rate of DBP reveals that the larger the charge and size of cations contained, the more the inhibition of reaction rate increased. The UV/TiO2/glass process yielded a 75% degradation efficiency of DBP with initial concentration of 5 mg L(-1) at 80 min reaction time.
本研究评估了一种填充有TiO2/玻璃（即负载在玻璃珠上的TiO2）的光反应器在紫外线照射下（记为UV/TiO2/玻璃）对水溶液中邻苯二甲酸二丁酯（DBP）的分解性能。发现该UV/TiO2/玻璃工艺对DBP的光降解速率服从由朗缪尔-欣谢尔伍德模型表示的准一级动力学。本研究的实验结果表明，在pH值为4.5 - 9时，水溶液的pH值对反应速率的影响可忽略不计。阳离子对DBP光降解速率的影响表明，所含阳离子的电荷和尺寸越大，对反应速率的抑制作用增加得越多。在反应80分钟时，UV/TiO2/玻璃工艺对初始浓度为5 mg L(-1)的DBP产生了75%的降解效率。
