摘要
于2017年9月在城区4个主要水体采集了42个表层水样,测定了Hg和As的含量,并采用美国环境保护署(USEPA)推荐的健康风险评价模型对其健康风险进行了初步评价。结果表明:聊城市城区水体中Hg、As的平均含量分别为2.400和1.899μg/L。As含量达标率为100%;Hg超标较为严重,东昌湖和小湄河Hg超标率为100%,徒骇河和小运河Hg超标率分别为85.7%和77.8%。各水体Hg、As含量具有显著的空间分布差异,这可能主要与其污染来源有关。As和Hg经过饮水途径而引发的健康风险值分别为1.35×10^-5a^-1和3.78×10^-9a^-1,其中As的风险值高于USEPA推荐的最大可接受风险值1.0×10^-6a^-1。
Overall 42 surface water samples were collected in September 2017 from four main water bodies in Liaocheng urban area, and the concentrations of Hg and As were measured. The health risk assessment model recommended by the United States Environmental Protection Agency (USEPA) was applied to primarily assess the health risk caused by Hg and As through drinking the water. The results showed that the average concentrations of Hg and As in the water of Liaocheng urban area were 2.400 and 1.899 μg/L. The concentration of As in each sampling site was lower than the type Ⅲ standard value of the GB 3838-2002 National Environmental Quality Standards for Surface Water, while the ratio for the Hg concentrations exceeding the standard value were 100% for Dongchang Lake and Xiaomei River, 85.7% for Tuhai River and 77.8% for Xiaoyun River, respectively. The concentrations of Hg and As both showed significantly difference in the spatial distribution, which might be related to their pollution sources. The average health risk values caused by As and Hg through drinking water were 1.35×10^-5 a^-1 and 3.78×10^-9 a^-1 respectively. The risk values of As are higher than the maximum allowance leve l(1.0×10^-6 a^-1 ).
作者
刘亚平
葛文超
毕文杰
张宁宁
张菊
Liu Yaping;Ge Wenchao;Bi Wenjie;Zhang Ningning;Zhang Ju(School of Environment and Planning, Liaocheng University, Liaocheng 252000, China)
出处
《环境科学与管理》
CAS
2019年第5期52-56,共5页
Environmental Science and Management
基金
国家自然科学基金项目(41401563)
山东省自然科学基金项目(ZR2014JL028)
聊城大学创新创业项目(201710447039)
聊城大学科技创新项目(26312171012,26312171013)资助
关键词
AS
HG
空间分布特征
健康风险评价
城区水体
As
Hg
spatial distribution characteristics
health risk assessment
urban water body
