水中邻苯二甲酸二丁酯的光催化降解

Photocatalysis of dibutyl phthalate in water

目的:研究光降解饮用水中邻苯二甲酸二丁酯化合物.方法:水中DBP在紫外光照射下,紫外光和臭氧共同作用下,以及加入纳米TiO2进行光催化降解.结果:紫外光和臭氧共同处理对DBP的降解有协同作用,单紫外光照射的半衰期是 10.6 min,紫外光与臭氧协同降解的半衰期是 7.8 min,而光催化的半衰期则小于 1 min,较小的粒经 20～30 nm 的TiO2光催化效果要好于较大粒经 30～50 nm 的TiO2光催化效果,加入 20～30 nm TiO2光催化剂的最佳剂量是 0.5 g/L,初始pH越大越有利于DBP的光催化降解.结论:光催化可有效降解水中邻苯二甲酸二丁酯.

Objective：To study the degradation of dibutyl phthalate （DBP） in dinking water. Methods： DBP water solution was treated by UV, UV/O3, UV ＋ TiO2, UV/O3 ＋ TiO2 respectively. Results： Synergetic effect existed in the photodegradation of DBP by UV and O3. The half life of photodegradation UV, UV/O3 was 10.6 min, and 7.8 min respectively. The half life of photocatalysis was less than 1.0 min. The photocatalytic effect of 20 - 30 nm TiO2 was better than 30 - 50 nm TiO2. The optimum dosage of 20 - 30 nm TiO2 was 0. 5 g/L. The alkali was propitious to photocatalysis. Conclusion ： DBP in water can be effectively degraded by TiO2 photocatalysiso