南方某市饮用水中氯化消毒副产物超标风险评估  

Risk Assessment of Chlorinated Disinfection By-products in Drinking Water in a Southern City of China

作　　者：蔡广强[1] 张金凤[2] 刘丽君[1] 卢小艳[1] 张金松[1] 黄河洵[1] 

机构地区：[1]深圳市水务<集团>有限公司,广东深圳518031 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《中国给水排水》2017年第3期37-41,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2015ZX07406-004)

摘　　要：对2012年1月—2013年12月我国南方某市4个主要水厂出厂水中三卤甲烷(THMs)、卤乙酸(HAAs)和三氯乙醛(CH)等三类氯化消毒副产物(DBPs)的监测数据进行统计分析,在超标风险水平分级条件下,对各类DBPs进行风险评估;同时,运用综合污染指数法对4个主要水厂的DBPs的超标综合风险予以评价。结果表明,THMs和HAAs两类DBPs的超标风险相对较低,基本处于无风险或三级风险状态,而CH具有相对较高的超标风险;三类DBPs的超标风险整体呈现明显的季节性变化,高温季节(5月—10月)相对较高。此外,4个主要水厂DBPs超标风险综合评价指数从高到低依次为A、B、D和C,但均处于较低水平,该市饮用水DBPs综合超标风险水平较低。通过以上评价,明确了该市饮用水DBPs整体风险水平及重点控制指标,对保障饮用水供水安全具有重要意义。Monitoring data of chlorinated disinfection by-products （ DBPs）, including trihalomethanes （THMs）, haloacetic acids （HAAs） and chloral hydrate （CH）, from four main waterworks in a southern city of China from January 2012 to December 2013 were analyzed. Additionally, DBPs risks were assessed under risk level classification. At the same time, the comprehensive risks of DBPs from the four main waterworks were evaluated by the method of comprehensive pollution indexes. The results indicated that the risks of THMs and HAAs were relatively low, in a state of no risk or risk level three. However, the risk of CH was relatively high, and obvious seasonal variation was presented for the three kinds of DBPs, namely, the risks were relatively high in high temperature season （from May to October）. Moreover, the comprehensive evaluation indexes of the four main waterworks from high to low were A, and C sequentially, but all were in low level. In other words, the comprehensive risks of drinking B,D water for the city were low. In a word, DBPs risks and the key control indicators were confirmed, which is of great significance for ensuring the safety of drinking water supply.

关 键 词：饮用水 三卤甲烷 卤乙酸 三氯乙醛 风险评估 

分 类 号：TU991.2[建筑科学—市政工程]