管网中SHs余氯化后典型副产物生成机理与迁移转化规律研究

As three steroid hormones(SHs), estrone(EI), 17β-estradiol, 17α-ethynyl estradiol,are the strongest hormonal effect of endocrine disrupting chemicals(EDCs) in the drinking water. In recent years, SHs are frequently found out in drinking water. Some researchers found that there was a series of complex physical and chemical reactions between SHs and disinfectants to generate chlorinated SHs with stronger endocrine disrupting characteristics. However, there is still a lack of systemactic research and evaluation for the byproducts and intermediate products of SHs produced by residual chlorination in water distribution system. This project selects three typical SHs as the research pollutants. Based on the dynamic water distribution system platform, studying the type and quantity of three disinfection byproducts of SHs (SH-DBPs), especially halogenated nitromethane, will be investigated. The effect of many factors on SH-DBPs will be studied and influence factor models will be built. The formation pathways of SH-DBPs chlorinated in a pilot scale water distribution system will be proposed. The changes of SH-DBPs in pilot scale water distribution system experiments under different pipe materials, retention time, flow velocity and temperature are also investigated. By systematically studying the type and quantity of SH-DBPs produced by residual chlorination and the changes of SH-DBPs in water distribution system, the control methods of SH-DBPs are directly proposed. It also gives the scientific theoretical basis for water sectors to control disinfection byproducts of SHs, halogenated nitromethane, and thus the quality of drinking water is further improved.

雌酮、17β-雌二醇和17α-乙炔雌二醇3种甾体激素(SHs)是饮用水中近年频频检出的毒性效应极强的一类内分泌干扰物。尽管研究发现SHs与氯生成内分泌干扰特性更强的氯代SHs。但对管网中残留SHs余氯化产生的副产物特别是含氮消毒副产物卤代硝基甲烷以及它们在管网中的变化缺少研究。因此，本项目以3种典型SHs为目标前体物，借助现有"动态管网试验平台"优越条件，研究自由氯和氯胺作用下，生成的消毒副产物特别是含氮消毒副产物卤代硝基甲烷的生成种类、生成量和生成路径；研究多种因素对SHs消毒副产物生成的影响规律，建立影响因素模型；研究SHs消毒副产物在不同管材、停留时间、流速和温度条件下随余氯衰减的变化规律。通过系统地研究管网中残留SHs余氯化后的典型副产物生成机理以及管网中的迁移转化规律，提出控制管网SHs氯化消毒副产物的技术，为供水部门合理控制典型SHs的消毒副产物卤代硝基甲烷提供科学理论支撑。

甾体激素是饮用水中近年频频检出的毒性效应极强的一类内分泌干扰物。本项目以.3种典型SHs为目标，借助现有的“动态管网试验平台”的优越条件，研究了自由氯.作用下， 生成的消毒副产物的种类、生成量和生成路径；研究了多种因素对SHs消毒副产物生成的影响规律，建立影响因素模型；研究SHs消毒副产物在不同管材、不同停留时间、流速和温度条件下随余氯衰减的变化规律。基于SHs在管网中余氯化后的消毒副产物生成规律和迁移转化规律，提出了控制管网SHs氯化消毒副产物的技术，为供水部门合理控制SHs的消毒副产物提供了理论支撑和参考依据。