随着各种新型消毒副产物（DBPs）及其毒性作用的不断被认识，如何在保证充分消毒的前提下控制DBPs导致的健康风险成为饮用水安全面临的一个重大挑战。给水管网系统作为一个巨大的“反应器”也是DBPs生成与转化的重要环节，直接影响着龙头水质。本项目将围绕管网输配过程的特定环境条件，深入研究典型金属元素（如铁、锰、铝等）的不同形态对DBPs生成转化的影响效应，探索金属元素不同形态与DBPs前驱体的结合方式，并进而揭示其影响作用机制；研究实际管网沉积物中存在的不同金属颗粒物与微生物、胞外分泌物、微量污染物等组成的复合体系对不同类型DBPs的生成与转化的影响效应，明确不同类型DBPs受管网输配过程因素影响而发生变化的机制，识别控制管网输配过程DBPs风险的关键因素。在此基础上，提出从水厂到龙头的DBPs控制技术方案建议，为饮用水安全保障提供必要的理论依据和技术支持。

With the continuous identification of new disinfection by-products (DBPs) and the understanding of their toxicity, controlling the DBPs-related health risks under the condition of sufficient disinfection is becoming a great challenge for drinking water safety. Drinking water distribution system (DWDS) as a huge “reactor” is a critical part of DBPs formation and transformation, which directly influences the water quality at consumers’ taps. This project will focus on the main DBPs-associated reactions occurred under the special environmental conditions in DWDS. The effects of typical metals (e.g. Fe, Mn, Al) species on the formation/transformation of DBPs will be investigated in-depth, and the interactions between metal species and DBP precursors will be fully characterized to reveal the involved reaction mechanisms. Pipe solid deposits will be collected from actual DWDS and their contribution to DBPs formation/transformation will be elucidated by specially designed experiments in terms of their complex constituents including metal oxides, microorganisms, extracellular polymeric substances, micro-pollutants. The key factors determining the DBPs formation/transformation will be targeted to establish a comprehensive strategy for ensuring the drinking water quality from water treatment plants to consumers taps.