N-亚硝胺消毒副产物具有高毒性及致癌性严重威胁饮用水安全，一直是国内外关注的焦点。相比于特定N-亚硝胺，建立总N-亚硝胺（TONO）指标来评价所有N-亚硝胺消毒副产物总量更具价值，因此在工程上建立TONO准确测定方法和高效控制技术是饮用水安全保障领域中亟待解决的问题。本项目通过构建紫外光解耦合化学发光体系测定TONO，探明TONO在氯胺/氯消毒过程中的生成规律与关键水质参数（如溶解性有机氮）的关系；系统识别TONO前驱物，建立前驱物官能团特征参数（如哈米特常数、最高占据分子轨道能量等）与TONO生成速率及摩尔产率的定量构效关系，揭示TONO在氯胺消毒过程中的生成原理；从控制前驱物的角度出发，研究界面调控臭氧氧化工艺预处理对后续氯胺/氯消毒过程中TONO生成的强化控制作用，最终为TONO在饮用水处理过程中的控制提供理论依据与技术支持。

N-nitrosamine disinfection by-products have high toxicity and carcinogenicity, which seriously threaten the safety of drinking water, and have raised great concerns at home and abroad. Compared with specific N-nitrosamines, it is more valuable to establish a total N-nitrosamine (TONO) index to evaluate the total amount of N-nitrosamine disinfection by-products. Therefore, establishing accurate determination and efficient control method of TONO for application is an urgent problem to be solved in the field of drinking water safety. In this project, TONO is determined by UV-photolysis coupled with chemiluminescence system, and the relationship between TONO formation and key water quality parameters (such as dissolved organic nitrogen) in chloramine/chlorine disinfection process is determined. TONO precursors will be identified systematically and quantitative structure-activity relationship between functional group characteristic parameters of TONO precursors (such as Hammett constant, highest occupied molecular orbital energy) and TONO formation rate and molar yield will be established. The mechanism of TONO formation in chloramine disinfection process will be revealed. During pre-ozonation of precursors regulated by interfacial interactions, enhanced control efficiency of TONO formation during post-chloramine/chlorine disinfection process will be studied. This project will finally provide theoretical basis and technical support for the control of TONO in drinking water treatment.