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在管理的含水层补充期间,PFAS从地下和毛细血管边缘释放

Tonoy K Das¹, Ziwei Han², Swapnil Banerjee¹

¹Civil and Environmental Engineering, University of California Los Angeles, Los Angeles, USA.

Environmental pollution (Barking, Essex : 1987)

|December 18, 2023

概括

管理的含水层补充可以从土壤中释放和多基物质 (PFAS). 在充电期间地下水位的波动会增加PFAS的释放,不同类型的PFAS表现出不同的行为.

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:

管理的地下水层补充 (MAR) 是城市地区的可持续水资源管理策略.
MAR涉及透回收水或雨水以补充地下水层.
在MAR期间,水表的快速波动可以从地下调动PFAS等污染物.

研究的目的:

为了评估PFAS在MAR期间从地下和毛细血管边缘区域的潜在释放.
调查地下水平面波动对PFAS调动的影响.
了解影响PFAS释放的因素,包括PFAS类型和土壤协会.

主要方法:

实验室柱体实验模拟MAR条件.
在柱子设置中引入 PFAS 预先污染的土壤.
在受控的地下水表波动期间监测PFAS释放.

主要成果:

在MAR期间的地下水位波动显著增加了PFBS和PFOS从毛细血管边缘的释放.
PFOS的释放主要是与颗粒相关的,而PFBS主要是溶解的.
水平面波动的方向没有影响PFAS释放.

结论:

海洋过程,特别是水表波动,可能导致PFAS从地下释放出来.
PFAS的释放取决于它们的化学特性和与土壤合物相互作用.
了解这些释放机制对于在MAR期间管理PFAS污染至关重要.

关键词:

空气-水接口的使用.扩散式运输是一种扩散式运输.地下水污染污染地下水污染源区源区源区地下土壤地下土壤.

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