催化臭氧分离膜制备及去除腐殖酸机理分析

以微污染水为处理对象，考察了新型催化膜的过滤性能及抗污染行为。实验过程中采用溶胶凝胶法制备纳米TiO2粉体，将不同焙烧温度的纳米TiO2颗粒加入铸膜液中，利用相转换法制备催化膜。采用X射线衍射（XRD）及扫描电子显微镜（SEM）对膜进行表征，对膜的纯水通量、孔隙率、接触角、膜的催化性能及分离特性进行了系统地测定。实验结果表明，金红石型TiO2催化膜对腐殖酸（humic acid，HA）及总有机碳（total organic carbon，TOC）的去除效率分别为70%及65%以上，说明金红石型TiO2催化膜具有较高的污染物去除及抗污染特性。实验结果证实新型多功能膜对于水处理的实际应用具有较大的发展潜力。

Preparation of catalytic ozonation membrane and analysis of humic acid removal mechanism

To further improve the effectiveness of membrane process and reduce membrane fouling，catalytic membranes were prepared with the phase transfer method in order to realize microfiltration coupling and catalytic ozonation for micro-polluted water treatment. The sol-gel method was used to prepare TiO2，and nano-sized particles at different heat treatment temperatures were added into the casting solution. The characteristics of catalytic membranes were investigated with X-ray diffraction（XRD），scanning electron microscopy（SEM），water flux，porosity，and contact angle. The membranes catalytic efficiency and membrane separation processes were also investigated. Rutile TiO2 （namely PVDF/ TiO2-600） membrane achieved above 70% and 65% removal rate of humic acid （HA） and total organic carbon （TOC），respectively. The novel catalytic membrane exhibited good catalytic ozonation activity and anti-fouling property for HA removal，which demonstrated that catalytic ozonation membrane an emerging technique for water treatment.