光催化去除流水中邻苯二甲酸二丁酯效果评价

Photodegradation of dibutyl phthalate in flowing water

目的研究光催化去除连续流水中邻苯二甲酸二丁酯(DBP)效果。方法设定4种不同流速水流25,65,110,190 ml/min。采用4种方式进行处理通O3(经臭氧发生器后产生的气体,流量为0.6 L/min);紫外光(UV)照射;UV照射同时通O3;UV同时通空气。在有光催化剂纳米(TiO2)和无催化剂条件下,进行光解实验,测定水中邻苯二甲酸二丁酯的去除率。结果TiO2能够促进DBP迅速光解,流速在190 ml/min时,DBP去除率也可达到88.8%。通空气对UV光降解效果不大,甚至降低去除率。紫外光和臭氧共同处理对DBP的降解有一定的协同作用。结论应用光催化在连续流水中可有效降解水中邻苯二甲酸二丁酯。

Objective To study the photodegradation of dibutyl phthalate （DBP） in flowing water. Methods 4 kinds of flow velocity： 25,65, 110,190 ml/min. 4 kinds of treatment：aerate O3 （to aerate the gas produced by O3 generator, flow rate： 0.6 L/min, the following is same） ; ultraviolet（UV） radiation; UV radiation with aerate 03 （UV/O3） ; UV radiation with aerate air （UV/air）. The removal rate of DBP in water was determinated after photodegradation in existing catalyzer nanometer TiO2 or not- Results Nanometer TiOz can promote DBP in water to photodegrate rapidly. The photocatalysis removal rate of DBP can reach 88.8 % when flow rate at 190 ml/min. Aerate air didn＇t promote UV degrate. Synergetic effect existed in the photodegradation of DBP by UV and O3. Conclusion DBP in flowing water can be effectively degraded by TiO2 photocatalysis.