Adsorption and photocatalytic degradation of pharmaceuticals and pesticides by carbon doped-TiO2 coated on zeolites under solar light irradiation

被引:31
|
作者
An, Ye [1 ,2 ]
de Ridder, David Johannes [3 ,4 ]
Zhao, Chun [1 ,2 ]
Schoutteten, Klaas [3 ]
Vanden Bussche, Julie [6 ]
Zheng, Huaili [1 ,2 ]
Chen, Gang [5 ]
Vanhaecke, Lynn [6 ]
机构
[1] Chongqing Univ, Minist Educ, Key Lab Gorges Reservoir Reg Ecoenvironm 3, Chongqing 400045, Peoples R China
[2] Chongqing Univ, Natl Ctr Int Res Low Carbon & Green Bldg, Chongqing 400045, Peoples R China
[3] Univ Ghent, Coupure Links 653, B-9000 Ghent, Belgium
[4] Delft Univ Technol, POB 5048, NL-2600 GA Delft, Netherlands
[5] Chongqing Univ, Chem & Chem Engn, Chongqing 400045, Peoples R China
[6] Univ Ghent, Salisburylaan 133, B-9820 Merelbeke, Belgium
基金
中国国家自然科学基金;
关键词
pesticides; pharmaceuticals; photocatalytic degradation; titanium dioxide; zeolite; AQUEOUS-SOLUTION; ANTIBIOTIC OXYTETRACYCLINE; ORGANIC-MATTER; WATER; TIO2; PHOTODEGRADATION; PRODUCTS; KINETICS; REMOVAL; SILICA;
D O I
10.2166/wst.2016.146
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
To evaluate the performance of zeolite-supported carbon-doped TiO2 composite catalysts toward target pollutants under solar light irradiation, the adsorption and photocatalytic degradation of 18 pharmaceuticals and pesticides with distinguishing features (molecular size and volume, and photolysis) were investigated using mordenite zeolites with SiO2/Al2O3 ratios of 18 and 240. Different quantities of carbon-doped TiO2 were coated on the zeolites, and then the finished composite catalysts were tested in demineralized, surface, and hospital wastewater samples, respectively. The composite photocatalysts were characterized by X-ray diffraction, field emission scanning electron microscopy, and surface area and porosity analyses. Results showed that a dispersed layer of carbon-doped TiO2 is formed on the zeolite surface; this layer blocks the micropores of zeolites and reduces their surface area. However, these reductions did not significantly affect adsorption onto the zeolites. Our results demonstrated that zeolite-supported carbon-doped TiO2 systems can effectively degrade 18 pharmaceuticals and pesticides in demineralized water under natural and simulated solar light irradiation. In surface and hospital wastewaters, zeolite-supported carbon-doped TiO2 systems present excellent anti-interference capability against radical scavengers and competitive organics for pollutants removal, and higher pollutants adsorption on zeolites evidently enhances the removal rate of target pollutants in surface and hospital wastewater samples with a complicated matrix.
引用
收藏
页码:2868 / 2881
页数:14
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