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结合现场数据集和数学建模,量化AFFF受影响地点的PFAS漏和大规模排放

Ryan Russell¹, Bo Guo¹, Jicai Zeng¹

¹Department of Hydrology and Atmospheric Sciences, University of Arizona, United States of America.

|July 24, 2025

概括

瓦多斯区储存多和多基物质 (PFAS),可能造成地下水污染. 建模显示质量再分配,而不仅仅是迁移,驱动PFAS运动,突出了需要动力性脱吸数据的需求.

科学领域:

环境科学环境科学
地质化学地质化学
水文学的水文学

背景情况:

瓦多斯区是受污染地点的和多基物质 (PFAS) 的关键储库.
PFAS与土壤接口分隔,使其漏复杂化,并对底层地下水构成风险.

研究的目的:

应用数学模型来模拟在受污染的现场场的毒区漏和PFAS大规模排放.
在环境和人工冲洗条件下使用特定站点数据分析PFAS运输过程.

主要方法:

利用数学模型,结合PFAS特定的保留和运输过程.
有详细现场数据集的受限模型,包括孔水度和土壤湿度.
进行了2个月的模拟和额外的40年长期模拟.

主要成果:

预测的孔水度通常与采样数据一致.
观察到的度变化与受土壤水分和空气-水界面影响的质量再分配有关.
速度有限的固相脱吸改善了PFOS和PFOA的模型准确性,特别是在浅土壤间隔.
长期模拟显示PFOS的一致性,但对PFOA,PFHxS和PFBS的过高估计泄漏.

结论:

准确的PFAS源强度和质量放电估计需要详细描述液压/运输参数,包括动力脱吸.
为了了解PFAS在剂区的行为,需要考虑土壤水分动态,空气-水界面区域和前体转化.
特定地点的透率对于可靠的长期PFAS漏预测至关重要.

关键词:

地下水的地下水.质量放电是一个大规模的放电.数学建模的数学建模 -和多基基物质 (PFAS) 的使用.有限速率的脱吸.瓦多塞区是瓦多塞地区.

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