Photocatalytic Degradation of Diethyl Phthalate with Surfactant Addition  

作　　者：张天永 扈娟 张友兰 李彬 费学宁 

机构地区：[1]School of Chemical Engineering and Technology Tianjin University, Tianjin 300072, China [2]Department of Environmental Engineering Tianjin Institute of Urban Construction, Tianjin 300384, China

出　　处：《Transactions of Tianjin University》2006年第4期258-263,共6页天津大学学报（英文版）

基　　金：Supported by Tianjin Natural Science Foundation (No. 033604711) and Science and Technology Foundation of Construction Ministry (No. 03-2-064).

摘　　要：This paper studies the adsorption of diethyl phthalate （DEP,an environmental hormone） on the surface of nanoscale TiO2, effects of pH value of solutions, initial concentrations of DEP and additive surfactant on photocatalytic degradation and dynamics of DEP. Under ultra violet illumination, the interaction between DEP and surfactants including DBS （sodium dodecylbenzenesulfonate）, CTAB （cetyltrimethylammonium bromide）, and OP-10 （nonylphenol polyoxyethylene ether） was exploited from the perspective of degradation speed calculated by the data of high pressure liquid chromatography （HPLC） and UV-Vis spectra, respectively. Photocatalytic degradation of DEP followed pseudo first-order reaction kinetics. DEP as substrate degraded fast when its initial concentration was 130 mg/L. TiO2 had certain adsorption ability of DEP. TiO2 could adsorb the most DEP at the approximately neutral pH of 6.91. Degradation of DEP was not affected obviously by additives OP-10 and DBS. Degradation rate of DEP was not enhanced greatly in the presence of surfactants, but degradation of DBS was sped up. Degradation rate of DEP was depressed in the presence of additive CTAB. The more CTAB was added, the less DEP was degraded. Degradation rate of CTAB became slow with the increase of initial CTAB concentration. The possible adsorption models among TiO2, DEP and surfactants were given.这篇论文学习酸二乙酯的吸附( DEP ，环境荷尔蒙)在 nanoscale TiO_2 ，答案的酸碱值价值的效果， DEP 的起始的集中和相片上的添加剂表面活化剂的表面上 DEP.Under 极端紫照明的催化降级和动力学，在 DEP 和表面活化剂包括 DBS (sodiumdodecylbenzenesulfon吃)之间的相互作用， CTAB ( cetyltrimethylammonium 溴化物)，和 OP-10 ( nonylphenolpolyoxyethylene 醚)从高压力液相色层分析法( HPLC )和紫外力的系列的数据分别地计算的降级速度的观点被利用。DEP 的 Photocatalyticdegradation 跟随了假一级反应动力学。当它的起始的集中是 130 mg/L 时，底层快降级了的 DEP。TiO_2 有 DEP 的某些吸附能力。TiO_2could 在 6 的近似中立的酸碱值吸附大多数 DEP。91。DEP 的降级没被添加剂 OP-10 和 DBS 显然影响。DEP 的降级率没面对表面活化剂极大地被提高，但是 DBS 的降级被加快。DEP 的降级率面对添加剂 CTAB 被压抑。越多 CTAB 被增加，越少 DEP 被降级。CTAB 的降级率随起始的 CTAB 集中的增加变得慢。在 TiO_2， DEP 和表面活化剂之中的可能的吸附模型被给。

关 键 词：diethyl phthalate SURFACTANT ADSORPTION dynamics PHOTOCATALYSIS DEGRADATION 

分 类 号：O734[理学—晶体学]