饮用水中碘代消毒副产物的生成机制与控制方法研究

I-DBPs是目前国际饮用水领域开始关注的新型强"三致"消毒副产物。我国微污染原水有机物含量高，水厂普遍采用氯胺消毒方式，在水中存在碘离子条件下，可导致出厂水中较高浓度I-DBPs的产生。本项目以饮用水净水工艺中I-DBPs的产生机制和控制理论为研究重点，开展预氧化中I-DBPs生成规律研究，阐明饮用水中I-DBPs产生新机制；解析微污染原水DOM组成与I-DBPs生成潜能间联系，揭示I-DBPs前体物的分子组成规律；探索原水中存在的典型有机碘前体物，探明其氯（胺）化反应特征和I-DBPs生成规律，掌握无碘离子条件下I-DBPs形成新途径；通过饮用水净水工艺归趋特性研究，建立水中I-DBPs生成预测经验模型，明晰预处理、常规和深度处理工艺单元中I-DBPs及其生成潜能的变化规律，探究有效的削减方法；最终为我国饮用水处理过程中I-DBPs的有效控制提供理论依据。

Iodinated disinfection by-products (I-DBPs) are newly defined emerging containments in drinking water and shows strong carcinogenic, teratogenic and mutagenic potential. With the present of iodide in the raw water, I-DBPs tend to be formed in the finished water after disinfection especially alterative chloramination, which is widely used drinking water plant for the raw water with high organic contents in China. In order to minimize risk of I-DBPs in drinking water, this project focus on the formation mechanism of I-DBPs and control methods in drinking water treatment and the following main contents will be investigated: (1) to indentify the new formation mechanism of I-DBPs during pre-oxidation in drinking water treatment as well as the effect of impacts; (2) to discover the constitute of I-DBPs precursors in micro-polluted raw water. The relation between fractional of dissolved organics and I-DBPs formation potential will be investigated; (3) to find typical organic iodine precursors in raw water and examine the new formation pathway of I-DBPs in absence of iodide. Kinetics and degradation pathways of these precursors during chlor(am)ination will be investigated as well; (4) to investigate the transformation of I-DBPs and precursors in pre-oxidation, conventional and advanced drinking water treatment. A predict models for I-DBPs formation is expected to be build. Moreover, the effective methods to minimize I-DBPs pollution would be provide. As shown above, the reliable and integrated theory of I-DBPs control in drinking water will be presented in this project.