联合消毒方式对控制水中含氮消毒副产物的生成及其前驱体的研究

氯消毒副产物（DBPs），尤其是含氮消毒副产物，因其潜在毒性已成为安全生活用水的主要威胁。研究表明可替代消毒方式（包括紫外光，臭氧，二氧化氯等）与氯消毒联合运用，对控制消毒副产物及其前驱体有应用潜力，但是对多种自由基交叉和协同复杂的反应过程，未知的DBPs以及传统DBPs分布规律的改变尚缺乏系统深入的研究。本项目拟利用先进的膜质谱等分析手段，检测联合消毒方式产生的未知消毒副产物，通过动力学、活性中间体及产物分析，从分子水平阐明联合消毒技术中消毒副产物产生的机理和去除效率，进而根据不同水体甄选消毒方法，优化消毒剂比例、光波长、pH以及其它影响因素，达到减少消毒副产物的目的，结合实际水样，印证实验假设，为选择和优化联合消毒技术提供科学理论依据。

While chlorination provides hygienically safe drinking water, chlorine reacts with inorganic or organic precursors, leading to the formation of harmful disinfection byproducts (DBPs). Alternative disinfectants including UV irradiation, ozone and chlorine dioxide, showed the potential to decrease the DBP and their precursors，but lacked systematical and profound study because of complex mechanism. The primary aim of this study is to examine the impact of various combined disinfectants on the formation of DBPs and their precursors by membrane introduction mass spectrometry (MIMS). This study will investigate the effectiveness of combined disinfectants in removing DBPs and their precursors and identifies potential factors and the mechanism that may control the removal or contribute to formation of DBP and their precursors during water treatment. Operating parameters, such as disinfectant dose, UV wavelength and pH may be optimized to control the regulated DBPs base on various water systems. Developing a greater understanding of the control of DBPs will allow for improved environmental protection and water quality.