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建模地基水中的per-和polyfluoroalkyl物质前体转化,在一个有良好的特征的地点

Emily B Stockwell¹, David T Adamson², Jeff D Gamlin¹

¹GSI Environmental Inc., 13949 W Colfax Avenue, Suite 210, Lakewood, CO 80401, USA.

Journal of contaminant hydrology

|November 6, 2025

概括

前体转化显著影响了地下水被 perfluoroalkyl 酸 (PFAA) 污染,推动了 PFOA,PFHxS 和 PFBS 的长和度. 矩阵扩散和缺乏降解导致长期持久性.

科学领域:

环境科学环境科学
水文地质学水文地质学
环境化学环境化学

背景情况:

perfluoroalkyl 酸 (PFAA) 是受监管的,移动的地下水污染物.
酸可以通过前体化合物的转化而形成.
了解这些过程对于有效的补救至关重要.

研究的目的:

为了建模前体转化对PFAA地下水的影响.
量化前体对PFAA度和羽毛范围的贡献.
为了评估PFAA羽毛的长期持久性,考虑到矩阵扩散和降解.

主要方法:

一个包含矩阵扩散的半分析地下水模型被校准.
使用了来自一个有PFAA和前体的地点的现场PFAS数据.
模型参数包括源特性,命运,运输和前体转化速率.

主要成果:

前体转化对PFOA,PFHxS和PFBS羽毛度 (59-87%) 有显著的贡献.
前体转化扩大了PFOA,PFHxS和PFBS羽毛幅度高达17%.
由于相对于前体的高源度,PFOS羽受到的影响较小.

结论:

前体转化是PFAA地下水污染的一个关键过程.
矩阵扩散和缺乏降解导致持久的PFAA羽毛,由前体转化维持.
有效的PFAS管理需要考虑前体化合物和长期运输过程.

关键词:

他们的命运和运输.在PFAS中,有很多方法.在REMChlor-MD中使用.整治整治整治整治转换率转换率是指转换率是指转换率.

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