环境科学与工程学院暨广东省环境污染控制与修复技术重点实验室

报告题目：Chasing Disinfection Byproducts Through the Pipes: How 66 DBPs Change Over Time in Chlorinated vs. Chloraminated Distribution Systems

报告   人：Susan Richardson教授

                 University of South Carolina

时      间：2025年12月2日（周二）下午3:30-5:00

地      点：东校园环境大楼A104

主      持：杨欣教授

欢迎广大师生参加！

报告人简介:

      Dr. Susan Richardson is the Arthur Sease Williams Professor of Chemistry at the University of South Carolina and was formerly at the U.S. EPA for many years.  Her research surrounds the study of emerging contaminants in water. She is a member of the National Academy of Engineering (2024), Executive Editor and Associate Editor for Environmental Science & Technology, past President of the American Society for Mass Spectrometry (2020-2022), and received the American Chemical Society (ACS) Award for Creative Advancements in Environmental Science & Technology (2008), an Honorary Doctorate from Cape Breton University (2006), an AAAS Fellow (2019), an ACS Fellow (2016), the Herty Medal (2020), the Southern Chemist Award (2020), the Walter J. Weber, Jr. AEESP Frontier in Research Award (2021), and the Analytical Scientist Power List (2024, 2023, 2021, and 2019). Over her career, she has published 220 articles, given >400 invited presentations and seminars (including 80 plenaries/keynotes) and >200 contributed presentations. 

      Susan Richardson博士现任南卡罗来纳大学阿瑟·西姆斯·威廉姆斯讲席教授，此前曾长期供职于美国国家环境保护局。她的研究主要聚焦于水体中新污染物的分析与治理。作为美国国家工程院院士（2024年当选），她兼任《Environmental Science & Technolog》期刊执行主编及副主编，曾担任美国质谱学会主席（2020-2022），荣获美国化学会环境科学与技术创新奖（2008）、加拿大不列颠海角大学荣誉博士学位（2006），当选美国科学促进会会士（2019）与美国化学会会士（2016），另获赫蒂奖章（2020）、南方化学家奖（2020）、韦伯环境工程前沿研究奖（2021），并多次入选《分析科学家》权威榜单（2024年、2023年、2021年及2019年）。在其学术生涯中，已发表220篇学术论文，进行逾400场特邀报告与学术讲座（含80场全会/主题报告）以及200余场专题学术报告。

报告内容简介：

      While disinfection byproducts (DBPs) are typically measured at drinking water treatment plants, levels can change dramatically within the distribution system before reaching the consumer. This study investigated these changes by comparing two drinking water distribution systems that used different residual disinfectants: chlorine and chloramines. The key finding was a fundamental difference in how DBP levels evolved. In the chlorine system, the formation of new DBPs in the pipes was greater than their degradation. Conversely, in the chloramine system, the degradation of DBPs was the dominant process. This dynamic also influenced the overall calculated cytotoxicity of the water. Interestingly, the cytotoxicity decreased in both systems by the time the water reached the end of the network, but for different reasons. In the chloramine system, the decrease was due to a broad reduction in the concentration of all DBP classes. In the chlorine system, the decrease was driven by a shift in the chemical composition of the DBPs, specifically a move towards more chlorinated species compared to brominated ones. This research highlights that the safety and chemical profile of drinking water are not static after treatment but are dynamic throughout the distribution system, and are strongly influenced by the choice of residual disinfectant.

      虽然饮用水处理厂通常会检测消毒副产物（DBPs），但这些物质的浓度在到达用户龙头前的输配水管网中会发生显著变化。本次研讨会报告通过对比分别采用氯胺和余氯作为消毒剂的两种输配水系统，揭示消毒副产物在管网中的动态变化规律。研究发现，两种系统中消毒副产物的演变趋势截然不同：在余氯系统中，管道内消毒副产物的生成速率总体超过降解速率；而在氯胺系统中，降解过程则占据主导地位。这种动态变化同样影响着水体的综合毒性特征。从水厂到管网末端，两种系统的计算毒性均有所降低，但其机理各异：在氯胺系统中，毒性降低源于所有消毒副产物种类的整体减少；而在余氯系统中，毒性下降主要得益于消毒副产物组成从溴代产物向氯代产物的转变。这项研究证实，饮用水的安全性在离开水厂后仍处于动态变化之中，消毒剂种类的选择对管网水质具有决定性影响，这对饮用水安全管理策略的制定具有重要指导意义。