表面分子印迹聚合物修饰 TiO2纳米管去除污水厂二级处理出水中雌激素试验

摘要

制备了基于表面分子印迹聚合物修饰的TiO2纳米管（S MIP TiO2 NTs）光催化剂，并利用SEM和FT IR手段进行了表征。结果表明S MIP TiO2 NTs的平均粒径为60 nm，针对模板分子，相对于修饰前的TiO2纳米管（TiO2 NTs），S MIP TiO2 NTs的吸附选择性和光催化性能得到了提高。相对于高浓度范围（10～100 mg／L），在低浓度范围（10～100μg／L）内S MIP TiO2 NTs显示出较高的吸附催化性能。利用S MIP TiO2 NTs可以去除尾水中部分代表性的雌激素，同时还具有较好的再生性能。%Surface-molecular-imprinted and polymer-modified TiO2 nanotube (S MIP TiO2 NTs)photocatalysts were fabricated, characterized,and tested for the removal of estrogenic pollutants from wastewater in this study for the first time. The results of scanning electron microscopy and Fourier-transform infrared spectroscopy show that average diameters of TiO2 NTs is 60 nm. The adsorption selectivity and photocatalytic activity of S MIP TiO2 NTs on template compound,which is compared with TiO2 NTs,are improved. Interestingly,S MIP TiO2 NTs exhibits higher adsorption intensity and photocatalytic selectivity at low concentrations (10~100μg/L)of E2 than at high concentrations (10 ~100 mg/L ). It is also found that some representative estrogenic chemicals could be selectively and rapidly removed from secondary effluents of municipal wastewater treatment plants using S MIP TiO2 NTs as photocatalysts. S MIP TiO2 NTs photocatalysts exhibit excellent regeneration characteristics.