摘要
为评价长江镇江段水源地水体中重金属污染特征及对沿江居民健康风险,于2015年1月—2020年12月采集长江镇江段8个饮用水断面的水样。通过金属综合污染指数法(HPI)和EPA健康风险评价模型对水样中8种重金属(Mn、Zn、As、Cu、Pb、Cd、Hg、Fe)浓度的时空分布特征和健康危害风险进行评估。结果表明,水体中8种重金属的平均浓度均达到《地表水环境质量标准》(GB 3838—2002)中规定的Ⅰ类水质指标,8个采样断面水体的HPI指数均低于该段国家标准要求的限值(HPI <100)。断面总健康风险顺序依次为二墩港取水口>征润州取水口>世业洲取水口>江心洲取水口。致癌物质和非致癌物质产生的健康风险值依次为As> Cd> Pb> Fe> Zn> Mn> Hg> Cu;不同年龄段居民的致癌健康风险和非致癌健康风险均为幼儿>青少年>老年人>成年人。说明长江镇江段流域水体重金属的污染防控措施得当,水环境生态指标良好,是理想的人类栖息居住地。
In order to evaluate the characteristics of heavy metal pollution in the water source area of Zhenjiang section of the Yangtze River and the health risks to the residents along the river, water samples from 8 drinking water sections of Zhenjiang section of the Yangtze River are collected from January 2015 to December 2020. The spatial and temporal distribution characteristics and health hazard risk of eight heavy metals(Mn, Zn, As, Cu, Pb, Cd, Hg, Fe) in water samples are evaluated by metal comprehensive pollution index(HPI) and EPA health risk assessment model.The results show that the average concentration of eight heavy metals in the water reached the class Ⅰ water quality index stipulated in GB 3838—2002, and the HPI index of the water at eight sampling sections is lower than the limit value required by the national standard. The order of total health risk was: Erdun port intake > Zhenrunzhou intake >Shiyezhou intake > Jiangxinzhou intake. The health risk values of carcinogens and non-carcinogens are: As > Cd >Pb> > Fe > Zn > Mn > Hg > Cu. The carcinogenic and non-carcinogenic health risks of residents of different age groups are: children > adolescents > elderly > adults. This indicates that the Zhenjiang section of the Yangtze River basin has proper pollution control measures and good water environment ecological indicators, and is an ideal habitat for human beings.
作者
王晨希
黄晶
杨紫薇
李双双
何媛媛
WANG Chenxi;HUANG Jing;YANG Ziwei;LI Shuangshuang;HE Yuanyuan(Zhenjiang Environmental Monitoring Center of Jiangsu Province,Zhenjiang 212000,China)
出处
《生物化工》
2022年第5期125-127,133,共4页
Biological Chemical Engineering
基金
江苏省镇江环境中心课题(ZJ2106)。
关键词
长江镇江段
重金属
HPI
健康风险评价
Zhenjiang section of Yangtze River
heavy metals
HPI
health risk assessment
