摘要
为保障城市供水安全,实现南方某市优质饮用水入户,通过对目前供水管网水质情况进行调查分析,明确供水管网系统中溶解性有机物(DOM)在不同季节、余氯及停留时间等参数条件下对消毒副产物(DBPs)生成情况的影响。研究表明:供水管网系统中常规水质指标如浑浊度、余氯和溶解性有机物主要取决于出厂水的浓度,供水管网中余氯变化较大,在管道中进行补氯有利于提升供水管网中不利点的居民饮用水安全。紫外和荧光光谱分析方法在供水管道中检测方便、检测限较低且不受其他工艺影响且检测浓度较低,可有效指示供水管道中存在的异常风险。三氯甲烷与卤乙酸是供水管网系统中主要存在的DBPs,其生成受到出厂水水质、管道、管道距离及季节性等多因素的影响,在供水管线中的含量变为随管线距离增长而增大;在温度较高的季节DBPs生成浓度高、反应速度快,应受到重点关注。
In order to ensure the safety of urban water supply and realize the entry of high-quality drinking water in a southern city,the current water quality of the water supply pipelines network was investigated and analyzed.The influence of dissolved organic matter(DOM)in the water supply pipelines network system on the formation of disinfection by-products(DBPs)under different seasons,residual chlorine and residence time was clarified in this study.The conventional indices of DOM in the water supply pipelines network system,such as turbidity,residual chlorine and DOM mainly depended on the concentration of water production.After chlorine supplementation,it was conducive to improving the safety of drinking water for residents at unfavorable points of the pipelines network.Fluorescence spectroscopy and UV was convenient to test in water supply pipelines,which was not affected by other processes with low concentrations and indicated the risk of abnormalities in water supply pipelines.THMs and HAAs were the main DBPs in the water supply pipelines network system,and their formation was affected by many factors such as effluent quality,pipelines,pipelines distance and seasonality,and the content in the water supply pipelines increases with the increase of pipelines distance.In the season of higher temperature,the concentration was high and the reaction speed was fast,So changes in the content of disinfection by-products should be widely concerned.
作者
王远
陆纳新
汪鹏
唐玉霖
王慕
WANG Yuan;LU Naxin;WANG Peng;TANG Yulin;WANG Mu(College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;Wuxi Xishan District Emergency Management Bureau,Wuxi 214100,China;Wuxi Public Utilities Environment Testing Research Institute Co.,Ltd.,Wuxi 214100,China;Nanjing Waterway Engineering Bureau of the Yangtze River,Nanjing 210000,China)
出处
《净水技术》
CAS
2024年第6期63-70,共8页
Water Purification Technology
基金
国家水体污染控制与治理科技重大专项(2017ZX07201002)。
关键词
供水管网
溶解性有机物
消毒副产物
余氯
荧光光谱
water supply pipelines network
dissolved organic matter(DOM)
disinfection by-products(DPBs)
residual chlorine
fluorescence spectrum
