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在干旱,城市,废水占主导地位的流域中,基和多基物质的来源

Kyle A Thompson¹, Hannah Ray², Daniel Gerrity²

¹Water Quality Research and Development, Southern Nevada Water Authority, Henderson, NV, USA; Carollo Engineers, Inc., Austin, TX, USA.

The Science of the total environment

|May 22, 2024

概括

市政废水污水是拉斯维加斯洗区中和多基物质 (PFAS) 的主要来源,住宅废水是主要贡献者. 其他消息来源,如机场,显示PFAS在主要洗衣机的装载量很小.

科学领域:

环境化学环境化学
评估水质水质的评估.
污染物源追踪污染物源追踪

背景情况:

和多醇基物质 (PFAS) 污染了来自不同来源的地表水,包括工业排放和消防活动.
拉斯维加斯洗作为废水排放至米德湖的关键管道,米德湖是美国西南部的重要饮用水库.
之前的研究在拉斯维加斯洗中检测到PFAS,但未能确定其来源.

研究的目的:

为了确定拉斯维加斯华盛顿州内的和多基物质 (PFAS) 的来源.
调查上游支流,废水处理厂废水和浅地下水的PFAS贡献.
评估各种潜在的PFAS来源的重要性,包括工业场所,机场和住宅废水.

主要方法:

在多个活动中对上游洗支流,废水处理废水和浅地下水井的抽样.
对19种不同的PFAS化合物的分析,以确定度和负载.
质量负载计算以量化不同来源对拉斯维加斯华盛顿州PFAS总负载的贡献.

主要成果:

短链PFAS,特别是 perfluoropentanoic 酸 (48%) 和 perfluorohexanoic 酸 (32%),构成了拉斯维加斯华盛顿州检测到的大部分PFAS.
市政废水排放被确定为主要来源,约占PFAS总量装载量的90%.
一个民用机场附近的排水区显示了高硫酸的含量,但对主要干水的贡献很小 (≤15%).
靠近机场和空军基地的一条小支流显示PFAS度较低,表明它们不是重要的来源.

结论:

废水排放,特别是来自住宅来源的废水,是PFAS进入拉斯维加斯华盛顿的主要通道.
该研究强调了用于复杂水生系统中PFAS来源调查的方法的有效性.
了解废水废水作为主要的PFAS运输路线对于管理米德湖等下游水库的饮用水质量至关重要.

关键词:

机场机场机场机场机场质量平衡的质量平衡.这就是PFOA的PFOA.在PFOS系统中,我们可以和多醇基物质是多和多的.废水排放的废水是废水.

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