水源水中的抗生素污染对饮用水安全性构成严重威胁，研发可高效去除抗生素的处理技术是水质安全保障的热点。本项目开发溶胶-浸渍-水热两级焙烧“低损”制备技术，研制氧化铋（Bi2O3）、二氧化钛（TiO2）、粉末活性炭（PAC）共同制备的新型多效耦合材料（PAC/Bi2O3/TiO2），并通过表征结构及构效关系对复合材料的特性进行优化；研究耦合材料对典型抗生素的PAC吸附/Bi2O3/TiO2光催化氧化降解/PAC原位再生的作用过程、降解途径及形态转化特征，解析Bi2O3/TiO2和PAC在耦合材料界面的协同作用机制，研究水质、工艺等关键因素对典型抗生素降解过程及去除特性的影响机制；构建基于吸附/光催化氧化降解/原位再生的耦合技术，研究抗生素的吸附/催化氧化降解特性与效能，形成具有多重功效的协同除污染体系，为PAC/Bi2O3/TiO2复合材料的耦合除污染物技术提供理论依据与技术。

Antibiotic contamination of source water poses a serious threat to the safety of resultant drinking water. Research towards treatment technologies that can effectively remove antibiotics from water is important to improve water quality and safety. To this purpose, we develop a novel multi-function composite, coupling bismuth oxide (Bi2O3), titanium dioxide (TiO2) with powdered activated carbon (PAC) together, by sol-impregnation-hydrothermal two-stage calcination using "low loss" preparation technique. The preparation of composites (PAC/Bi2O3/TiO2) is optimized by characterizing their properties and establishing the relationships between their properties and removal efficiency of antibiotics. Adsorption of typical antibiotics, possible catalytic oxidative degradation, and in-situ regeneration of the as-prepared composites will be studied, together with underlying mechanisms of the coupling process, degradation pathways and form transformation features. The synergistic activities of Bi2O3/TiO2 and PAC on the interface of composite will be revealed. The influencing mechanism of key factors such as raw water quality and operation parameters on removal efficiency of typical antibiotics and their degradation pathways are clarified. Through constructing the multi-function technique of PAC adsorption, Bi2O3/TiO2 catalytic oxidative degradation and PAC in situ regeneration, the removal efficiency and characteristics of typical antibiotics and other pollutants is optimized. The developed multi-functional technique for synergistic water decontamination and the characteristics of individual process involved provides theoretical guidance and support for future water treatment based on the collaborative decontamination system using PAC/Bi2O3/TiO2 composites.