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实验室验证了一种简化模型,用于估计平衡 PFAS 从不和土壤中大量浸出

John F Stults¹, Charles E Schaefer², Tamzen MacBeth³

¹CDM Smith, 14432 SE Eastgate Way, Suite 100, Bellevue, WA 98007, USA.

The Science of the total environment

|March 5, 2025

概括

简化的模型可以准确地预测长时间内从瓦多区到地下水的每和多基物质 (PFAS) 质量流. 这项研究验证了评估PFAS漏的平衡模型,有助于土壤清洁标准的开发.

科学领域:

环境科学环境科学
地质科学是地球科学.
化学工程是化学工程的重要组成部分.

背景情况:

由于短暂的水流和多重分区过程,和多醇基物质 (PFAS) 在瓦多斯区存在复杂的运输挑战.
现有的PFAS漏查模型被简化,需要改进评估土壤清洁标准的方法.

研究的目的:

开发和验证一种简化模型,用于评估PFAS从剂区到地下水的质量流.
量化平衡分区和液压过程,以增强瓦多斯区漏模型.

主要方法:

开发了一种基于单元的质量流模型,该模型包含固体-空气-水界面分区和短暂的液压过程.
在模拟降雨条件下的柱子研究产生了暂时的液压和PFAS漏数据.
带有PFAS模块的HYDRUS 1-D被用于模型校准和前向模拟以及质量平衡近似.

主要成果:

在HYDRUS 1-D和质量平衡近似模型中,所有PFAS的性能几乎相同.
这些模型准确地预测了大多数测量数据的大小的一半的PFAS大规模漏.
开发的模型有效地估计了从瓦多斯区的月到年规模的质量流.

结论:

简化的经验和数值模型可以可靠地估计 PFAS 质量流量从月至年时间尺度的 vadose 区.
这些模型适用于缺乏显著异质性或复杂运输非理想性的场所.
这些发现支持使用简化建模来评估PFAS污染,并为清理策略提供信息.

关键词:

这是一个近似的近似.质量流量是指质量流量.在PFAS中,有很多方法.选模型的选模型不和的不和的瓦多斯瓦多斯 (Vadose Vadose) 是一个

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