地下水流路的特征驱动了在河流湿地系统中对化物质 (PFAS) 和多化物质 (PFAS) 负载的变化
David M Rey1, Martin A Briggs2, Andrea K Tokranov3
1US Geological Survey, Hydrologic Remote Sensing Branch, Lakewood, CO, USA.
The Science of the total environment
|January 25, 2025
概括
和多基基物质 (PFAS) 污染了工业场所附近依赖地下水的生态系统. 这项研究揭示了复杂的地下水流路和影响排放区PFAS度的湖泊相互作用,突出了地下运输的重要性.
科学领域:
- 环境化学环境化学
- 水文地质学 水文地质学
- 生态毒理学 生态毒理学
背景情况:
- 依赖地下水的生态系统面临着工业用地污染的PFAS污染风险.
- 复杂的水文地质环境,沉积物透度不同,地下水与地表水的相互作用可能会产生复杂的污染物运输路径.
- 和多基基物质 (PFAS) 是令人担忧的持续性环境污染物.
研究的目的:
- 调查PFAS污染动态在一个已知的PFAS来源区域下坡的依赖地下水的溪流湿地系统中.
- 确定和描述优惠地下水排放区及其在PFAS运输中的作用.
- 了解地下水与湖泊相互作用对PFAS化合物度和转化的影响.
主要方法:
- 利用热跟踪和化学分析来确定优惠地下水排放点 (PDP).
- 收集和分析了40个PFAS化合物的地表水和地下水样本.
- 采用稳定同位素分析 (过量的) 来评估地下水与湖泊的相互作用.
主要成果:
- 在Quashnet河流-湿地系统中确定了许多PDP.
- 检测到一系列的PFAS化合物,包括碳酸盐,硫酸盐,甲硫酸盐和硫酸胺.
- 观察到多余,PFAS前体和终端PFAS化合物之间的相关性,这表明在湖泊地下水交换期间的前体转化.
- 发现排放区的PFAS度高于升级湖泊的情况,表明复杂的流道融合和潜在的湖床反应.
结论:
- 地下命运和运输过程显著影响PFAS度和在优惠地下水排放区的质量负载.
- 地下水与湖泊的相互作用在修改沿流道的PFAS标志方面发挥着至关重要的作用.
- 了解复杂的水文地质动态对于评估地下水依赖生态系统中的PFAS风险至关重要.
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