饮用水功能区水环境健康风险阈值体系研究  

Study on the water environmental health risk threshold system of drinking water function areas

作　　者：张晓惠[1] 陈红[1] 焦永杰[1] 熊发 杨亚男[3] 董菁[1] 杨静[1] 袁雪竹[1] 

机构地区：[1]天津市环境保护科学研究院,天津300191 [2]天津科技大学海洋科学与工程学院,天津300457 [3]天津工业大学环境与化学工程学院,天津300387

出　　处：《环境污染与防治》2015年第7期88-93,共6页Environmental Pollution & Control

基　　金：国家科技重大专项(No.2012ZX07203-002)

摘　　要：结合天津市饮用水功能区水环境现状,筛选出14种特征污染物,通过危害识别将其分为化学致癌物、非致癌有毒物和特殊物质3类。针对不同类别污染物建立健康风险评价模型,给出化学致癌物的致癌强度系数、非致癌有毒物参考剂量、人均寿命、不同年龄段人群日均饮水量和平均体重等参数,建立针对不同人群的饮用水功能区水质风险阈值体系。在此基础上,对天津市饮用水功能区——于桥水库进行水质风险进行评价。结果显示,于桥水库国控监测点位10个监测指标中,氨氮、挥发酚、汞、铅具有健康风险,4个指标的浓度均处于10-7的风险水平以下,说明于桥水库水环境健康程度较好,4个指标对成人及儿童的风险水平排序为铅>氨氮>汞>挥发酚,重金属铅是主要健康风险污染物。Combined with the current situation of drinking water function areas of Tianjin,this paper screened fourteen kinds of characteristics pollutants and divided them into chemical carcinogens, non-carcinogens toxicants and special materials base on their harmfulness. The health risk assessment models for different kinds of pollutants were established, and the model parameters, such as carcinogenic intensity coefficient, non-carcinogen reference dose, the av- erage life expectancy, the average daily water quantity and weight of different human groups,were corrected according to the local conditions, base on which,the water quality risk classification threshold system of drinking water function areas for different groups of people was established. Yuqiao Reservoir,the important municipal drinking water func- tion area in Tianjin,was selected as research object to evaluate its water quality risk, results showed that among the 10 monitored water quality indicators,ammonia nitrogen, volatile phenol, Hg and Pb had certain health risk, while their concentrations were all below the risk level of 10-7 ,indicating that the health risk state of water environment in Yuqiao Reservoir was good. The health risk of 4 index for adults and children followed the order of Pb〉ammonia nitrogen〉 Hg〉volatile phenol,heavy metal lead was the main risk factor.

关 键 词：饮水功能区 水环境健康风险 阈值体系 于桥水库 

分 类 号：X824[环境科学与工程—环境工程]