水中邻苯二甲酸二甲酯的光催化氧化研究  

DEGRADATION OF DIMETHYL PHTHALATE IN AQUEOUS SOLUTIONS BY PHOTO-CATALYTIC OXIDATION

作　　者：李海燕[1] 施银桃[1] 曾庆福[1] 

机构地区：[1]武汉科技学院环境科学研究所,湖北武汉400073

出　　处：《水处理技术》2004年第4期224-226,共3页Technology of Water Treatment

基　　金：教育部资助;教技司(2000)65号

摘　　要：以汞灯、氙灯为光源,TiO2为光催化荆,较系统的考察了催化剂用量、光强、反应时间、pH值等因素对水中邻苯二甲酸二甲酯降解的影响。结果表明,只有在催化剂和光源协同作用时,邻苯二甲酸二甲酯才可获得较快的分解,光催化氧化反应符合假一级反应动力学。TiO2的光催化氧化作用受pH值影响不大,催化剂用量有一最佳值。采用胶束电动毛细管电泳技术对邻苯二甲酸二甲酯的光催化降解反应过程进行了跟踪。The TiO2-photocatalytic degradation of 10mg/L dimethyl phthalate in aqueous solutions was investigated by using solar and xenon light soure.The effect of TiO2 concentration,illumination time,pH,light intensity and initial concentration were investigated.Results showed that degradation of phthalate ester in TiO2/UV system was faster than TiO2 alone or UV lamp irradiation alone.A pseudo-first order reaction kinetics was proposed to simulate the photocatalytic degradation of dimethyi phthalate.The suitable TiO2 concentration was 1.5g/L.Characterization of raw water and the intermediates were analyzed by micellar electrokinetic capillary chromatography.

关 键 词：邻苯二甲酸二甲酯 光催化氧化反应 一级反应动力学 光催化降解 TiO2 pH值 分解 催化剂用量 反应过程 反应时间 

分 类 号：P315[天文地球—地震学] X703[天文地球—固体地球物理学]