以来源为导向的概率性健康风险评估地表水潜在的有毒元素和在Tethyan-Himalayan构造领域的基本微量元素
Jialu An1, Aidi Huo1, Yuan Tian2
1School of Water and Environment, Chang'an University, Xi'an, Shaanxi 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of the Ministry of Education, Chang'an University, Xi'an, Shaanxi 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an, Shaanxi 710054, China.
西藏的地表水显示局部和丰富. 自然地质源是关键的,带来致癌风险,特别是对儿童,强调需要更好地管理高海拔污染.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 公共卫生 公共卫生
背景情况:
- 有效的污染管理需要确定地表水中的潜在有毒元素 (PTEs) 和必需微量元素 (ETEs) 的来源.
- 在了解高海拔环境中PTE/ETE综合污染和源风险关系方面存在研究差距.
研究的目的:
- 为了评估地表水污染的特点和健康风险的PTE和TEEs在西藏的Tethys-喜马拉雅地区.
- 为高海拔水体建立以来源为导向的健康风险评估框架.
主要方法:
- 使用绝对主要组件分数-多重线性回归 (APCS-MLR),正矩阵分解 (PMF),健康风险评估 (HRA) 和蒙特卡洛模拟 (MCS) 的综合方法.
- 对各种元素的污染源和相关健康风险的分析,包括 (As), (Se), (Cd), (Hg), (Pb),铜 (Cu),铁 (Fe), (Cr) 和 (Mn).
主要成果:
- 总体上水质优良, (高达257.72μg/L) 和的局部丰富.
- 确定了四个主要的污染源:自然地质,气候驱动的重新调动,工业交通和人为农业.
- 在83.67%的儿童和82.59%的成年人中,的致癌风险超过了安全值;概率风险评估表明风险高于确定性方法.
结论:
- 自然地质过程对高海拔地表水中的丰富有显著的贡献.
- 现有的健康风险评估方法可能低估了风险;概率方法提供了更全面的评估.
- 这些发现为管理高海拔地区的地表水污染和相关健康风险提供了科学基础.
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