紫外光与活性氯（UV/chlorine）的联用，可在传统加氯消毒工艺中原位引入高级氧化反应，进而实现对各类新兴污染物的高效去除和病原菌的强化灭活。目前国内外学者对UV/Cl2技术的研究主要限于日光UVA和低压汞灯UVC波段。近年来深紫外UVB波段半导体发光二极管（LED）光源实现商业生产，具有理论效率高、可频繁开关和环境友好等优点。本申请课题提出了基于UVB/Cl2联用氧化消毒协同水处理技术，旨在对UVB/Cl2的效率、机理与风险进行系统评价研究，包括：研究UVB/Cl2的光解效率与影响条件；探究UVB/Cl2联用对DOM组分和微污染物降解转化的作用效果与机制；考察UVB/Cl2联用过程中消毒副产物的生成机理与病原菌灭活机理和增强系数。本申请课题的研究成果可为将来基于深紫外LED光源的UVB/Cl2氧化消毒技术的集中式或分散式应用提供理论支撑。

The combination of UV irradiation and chlorination process, i.e., UV/chlorine, can achieve the in-situ advanced oxidation process during the conventional chlorination process, which enhances the elimination of various micropollutants and the deactivation of chlorine-resistant pathogens. Most studies focused on the applications of the UVA from sunlight or the UVC from low-pressure mercury light; while the novel deep-UVB light emitting diode (LED), with merits of high theoretical efficiency, frequent switching, and environment-friendly material, has become commercially available. This project proposes a novel oxidation and disinfection technology - UVB/Cl2 - using LED as light source. This research aims to the assessment and evaluation of the efficiency, mechanism and risks of the UVB/Cl2 process, which includes the following activities: (1) study on the efficiency of chlorine photolysis and its related influence factors; (2) explore the efficiency and mechanism of the UVB/Cl2 on the decomposition of dissolved organic matter and micropollutants; (3) investigate on the formation of disinfection byproducts and the enhanced factor of pathogen deactivation during UVB/Cl2. These studies are expected to promote the development of UVB-LED/Cl2 oxidation and disinfection technology in the modes of either centralization or distribution in the future.