典型新型污染物BPA在含氯胺水管网输配过程中的迁移、转化及反应机理研究

Emerging contaminants, such as EDCs, get more and more attention of the public and researchers, because of their widespread and highly toxic characteristics in aqueous environment. These contaminants cannot be removed effectively by conventional water treatment process. And thus large amount of EDCs present in distribution systems. It was showed that water quality changed when drinking water came into distribution system. Ammonia would react continuously with phenols in ammonia disinfected system and chlorinated products of more toxicity were produced. Transformation process and reaction mechanism of emerging contaminants during the distribution of drinking water were rarely studied. Especially, there were hardly any researches about migration and degradation of these contaminants in drinking water distribution system, where chloramines disinfection was adopted. Migration, transformation and degradation process of BPA in water distribution system containing chloramines were comprehensively studied in this research. The effect of key factors including different hydraulic conditions and pipe materials on chloramine reaction of BPA was revealed. And the degradation mechanism of chloramine reaction was also elaborated. The results will provide theoretical basis for the water suppliers to develop reasonable management and technical update programs.

内分泌干扰物（EDCs）等新型污染物因其在水环境中广泛存在和具有高毒性的特点，越来越多的受到公众和科学界的关注。自来水厂常规处理工艺对这类物质不能达到良好的去除效果，在输配管网中EDCs等新型污染物会大量存在。研究表明，饮用水进入输水管网中水质会发生变化，在采用氯消毒时，氯会与酚类等新型污染物持续反应生成毒性更强的氯代产物。对于饮用水管网输配过程等复杂环境下的新型污染物的转化过程和反应机理的研究还鲜有报道，特别是基于氯胺消毒的饮用水管网输配过程新型污染物的迁移转化及降解过程研究还属于空白。本项目以典型新型污染物——双酚A（BPA）为研究对象，对BPA在含氯胺饮用水管网输配过程中的迁移、转化及降解过程进行系统研究，揭示不同水质参数及管材等因素对管网输配过程中BPA氯胺化反应的影响，阐明管网输配过程中BPA氯胺化降解反应机理，为供水机构制定科学合理的管网运维及技术改造方案提供基础理论依据。

内分泌干扰物（EDCs）等新型污染物因其在水环境中广泛存在和具有高毒性的特点，越来越多的受到公众和科学界的关注。自来水厂常规处理工艺对这类物质不能达到良好的去除效果，在输配管网中EDCs等新型污染物会大量存在。研究表明，饮用水进入输水管网中水质会发生变化，在采用氯消毒时，氯会与酚类等新型污染物持续反应生成毒性更强的氯代产物。对于饮用水管网输配过程等复杂环境下的新型污染物的转化过程和反应机理的研究还鲜有报道，特别是基于氯胺消毒的饮用水管网输配过程新型污染物的迁移转化及降解过程研究还属于空白。本项目以典型新型污染物——双酚A（BPA）为研究对象，对BPA在含氯胺饮用水管网输配过程中的迁移、转化及降解过程进行系统研究，揭示了不同水质参数及管材等因素对管网输配过程中BPA氯胺化反应的影响，初步阐明了管网输配过程中BPA氯胺化降解反应机理，为供水机构制定科学合理的管网运维及技术改造方案提供基础理论依据。