| Photocatalytic Degradation of Diethyl Phthalate with Surfactant Addition |
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| 作者姓名： | 张天永 扈娟 张友兰 李彬 费学宁 |
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| 作者单位： | School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China，School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China，School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China，School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China，Department of Environmental Engineering Tianjin Institute of Urban Construction Tianjin 300384 China |
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| 基金项目： | Supported by Tianjin Natural Science Foundation (No. 033604711) and Science and Technology Foundation of Construction Ministry (No. 03-2-064). |
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| 摘 要： | This paper studies the adsorption of diethyl phthalate (DEP,an environmental hormone) on the surface of nanoscale TiO_2, 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 dodecylbenzenesulfon-ate), 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. TiO_2 had certain adsorption ability of DEP. TiO_2 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 TiO_2, DEP and surfactants were given.
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| 关 键 词： | 邻苯二甲酸二乙酯 表面活性剂 吸附 动力学 光催化 |
| 收稿时间： | 2005-12-13 |
Photocatalytic Degradation of Diethyl Phthalate with Surfactant Addition |
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| ZHANG Tianyong,HU Juan,ZHANG Youlan,LI Bin,FEI Xuening.Photocatalytic Degradation of Diethyl Phthalate with Surfactant Addition[J].Transactions of Tianjin University,2006,12(4):258-263. |
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| Authors: | ZHANG Tianyong HU Juan ZHANG Youlan LI Bin FEI Xuening |
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| Abstract: | This paper studies the adsorption of diethyl phthalate (DEP,an environmental hormone) on the surface of nanoscale TiO_2, 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 dodecylbenzenesulfon-ate), 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. TiO_2 had certain adsorption ability of DEP. TiO_2 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 TiO_2, DEP and surfactants were given. |
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| Keywords: | diethyl phthalate surfactant adsorption dynamics photocatalysis degradation |
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