低压汞灯(LPUV)广泛应用于水消毒工艺，可以同时产生185nm真空紫外光(VUV)和254nmUVC，但其中VUV没有得到利用。本项目以提高LPUV中VUV的利用率为出发点，利用VUV产生的水合电子和氢原子与过硫酸盐反应，产生硫酸根自由基，强化污染物的去除。拟通过探针化合物和动力学模型等方法，阐明VUV/UV/过硫酸盐体系中不同活性物种（如羟基自由基、硫酸根自由基）的生成和转化规律；选取典型微污染物为研究对象，明确体系中不同活性物种对微污染物降解动力学的贡献；解析水质条件和工艺条件对微污染物降解动力学的影响，并建立降解动力学模型优化体系参数；通过质谱分析和量子化学计算等方法阐明微污染物的降解路径；最后，明确该体系处理对水的急性毒性和遗传毒性的影响规律和调控方法。研究成果可发展一种新型VUV/UV/过硫酸盐体系，为含微污染物水源水的饮用水水质安全保障提供理论指导和技术支持。

Low pressure mercury lamp (LPUV) is widely used in water disinfection, it can simultaneously produce 185 nm vacuum ultraviolet light (VUV) and 254 nm UV-C, but VUV is not being used. To improve the effective utilization of VUV in LPUV, the project proposed the transformation of eaq- and H• generated from VUV to sulfate radical by using persulfate, to enhance the removal of pollutants. The project will investigate the transformation of reactive species (i.e. hydroxyl radical and sulfate radical) in VUV/UV/persulfate system by means of probe compounds and chemical kinetics models. Typical micropollutants were selected as target compounds to describe the contributions of different reactive species to the degradation of micropollutants in the system. The effects of water matrix and process conditions on degradation kinetics of micropollutants were analyzed, kinetic modelling will be established to optimize parameters. The degradation pathways of micropollutants were clarified by means of mass spectrometric analysis and quantum chemical calculation. Finally, the changes and control of acute toxicity and genotoxicity by this system were studied. The project will develop a novel VUV/UV/persulfate system, which will provide theoretical support and technical reference for the potable water quality safeguards of source water containing micropollutants.