摘要
地下水作为通州区的主要供水水源,探究地下水水质状况及健康风险对该地区可持续发展至关重要.以通州区地下水为研究对象,筛选了32个集中式饮用水源地,运用熵权水质指数(EWQI)和健康风险评估模型进行水质评价及风险评估,并运用绝对主成分-多元线性回归模型(APCS-MLR)进行风险来源解析.结果表明:①样品各水质指标浓度全部符合《地下水质量标准(GB/T14848-2017)》Ⅲ类标准;NO_(3)^(-)、Cu和Zn的变异系数介于1.48~3.56,局部富集程度高;无机盐SO_(4)^(2-)浓度呈南部高北部低的趋势;而As浓度呈北部高南部低的趋势.②研究区EWQI值范围为27.76~49.18,平均值为39.64,整体为Ⅰ级,全部达到优秀.③健康风险评价显示As存在潜在致癌风险,在相同环境下儿童比成人暴露风险更高.④地质环境和水文地球化学演化为As的主要来源,贡献占比高达85.70%.为保障通州区居民地下水饮用安全,As应当作为今后地下水优先控制的物质.
Groundwater is the main source of water supply in Tongzhou District.It is significant for sustainable development to explore the groundwater quality status and health risks.Taking Tongzhou District as the research object,32 centralized drinking water sources were selected to evaluate the water quality and health risks by using the entropy-weight water quality index(EWQI)with using the health risk assessment model,and the absolute principal component-multiple linear regression model(APCS-MLR)was used to analyze the sources of health risks.The results show that:①the concentration of all samples were lower than the Class III standard of Groundwater Quality Standard(GB/T 14848-2017);The coefficient of variation of NO_(3)^(-),Cu and Zn is between 1.48 and 3.56,and the local enrichment degree is high.SO_(4)^(2-)are higher in the south than in the north.However,As are higher in the north and lower in the south.②The EWQI value ranged from 27.76 to 49.18 in the study area,with an average of 39.64,and the whole area was Grade I,all were excellent.③Health risk assessment shows that As has potential carcinogenic risk,and the exposure risk of children is higher than that of adults in the same environment.④Geological environment and hydrogeochemistry are the main sources of As,accounting for 85.70%.In order to ensure the drinking safety of groundwater,As should be used as the controlled first in the future.
作者
卢梦淇
常帅
宋圆梦
赵波
高赛
陈昊达
王琳静
崔建升
张璐璐
LU Mengqi;CHANG Shuai;SONG Yuanmeng;ZHAO Bo;GAO Sai;CHEN Haoda;WANG Linjing;CUI Jiansheng;ZHANG Lulu(College of Environmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050000;Hebei Key Laboratory of Pollution Prevention Biotechnology,Shijiazhuang 050000)
出处
《环境科学学报》
CAS
CSCD
北大核心
2024年第8期279-287,共9页
Acta Scientiae Circumstantiae
基金
河北省教育厅重点项目(No.ZD2021046)。
