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使用PRZM5,LEACHM和HYDRUS-1D模型模拟废水灌农田中的PFAS运输

Shuchi Liao^1,2, Uriel Garza-Rubalcava¹, Linda M Abriola¹

¹School of Engineering, Brown University, Providence, Rhode Island, USA.

Journal of environmental quality

|October 17, 2024

概括

废水废水灌可以将和多基物质 (PFAS) 引入土壤. 与PRZM5不同,LEACHM和HYDRUS-1D模型准确地预测了PFAS保留率,强调了空气-水接口吸附在不和流模型中的重要性.

科学领域:

环境科学环境科学
土壤科学土壤科学
水文学的水文学

背景情况:

废水污水灌是一种可持续的作物生产实践.
新出现的污染物,如和多基物质 (PFAS),存在于废水废水中.
了解PFAS在土壤中的命运对于环境风险评估至关重要.

研究的目的:

评估不和流量模型,以预测PFAS在土壤中的分布.
评估空气-水接口 (AWI) 吸附对PFAS运输的影响.
将PRZM5,LEACHM和HYDRUS-1D模型的性能进行比较.

主要方法:

修改了PRZM5,LEACHM和HYDRUS-1D模型,包括AWI吸附.
在50年内模拟的PFAS (PFOS,PFOA) 在土壤特征中的分布.
使用了来自宾夕法尼亚州立大学生活过器网站的数据.

主要成果:

由于其水流方法,PRZM5未能准确预测 perfluorooctanesulfonic acid (PFOS) 的行为.
LEACHM和HYDRUS-1D成功捕获了长期保留的PFOS和酸 (PFOA).
由于不同的AWI计算方法,LEACHM预测AWI的PFAS积累比HYDRUS-1D更高.

结论:

结合不和流量和AWI吸附的数学模型对于预测长期PFAS漏是有效的.
对AWI的准确建模对于理解PFAS在剂区的命运至关重要.
LEACHM和HYDRUS-1D在评估农业废水再利用的PFAS风险方面表现有前途.

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