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对地下土壤和含水层中PFAS和人为的矿物学控制

Marina G Evich¹, James Ferreira², Oluwaseun Adeyemi³

¹USEPA, Office of Research and Development, Center for Environmental Measurement and Modeling, Athens, GA, USA. evich.marina@epa.gov.

Nature communications

|April 1, 2025

概括

和多基基物质 (PFAS) 进入土壤和地下水. 矿物学和静电吸附控制PFAS流动性,短链PFAS受氧化物影响,长链PFAS受有机物影响.

科学领域:

环境科学环境科学
地质化学地质化学
土壤科学土壤科学

背景情况:

和多基物质 (PFAS) 通过各种途径污染土壤和地下水.
目前的模型通常将土壤简化为同质介质,从而限制了准确的PFAS吸附预测.
了解矿物-PFAS相互作用对于预测环境命运至关重要.

研究的目的:

研究矿物质和静电吸附在控制地下农业土壤中PFAS流动性的作用.
为了区分短链和长链PFAS的吸附机制.
改进PFAS在环境中的运输模型.

主要方法:

在土壤和含水层柱中测量地质化学参数和PFAS度.
计算pH取决于矿物质表面电荷的方法.
分析整个土壤和含水层柱,以评估污染物的迁移.

主要成果:

短链PFAS的地下流动性主要由对氧化矿物质的静电吸附控制.
长链PFAS的移动性主要通过与有机物和空气-水接口区域的相互作用来控制.
PFAS吸附受矿物质组合和pH取决于表面电荷的影响.

结论:

在地下环境中的PFAS流动性是复杂的,取决于PFAS链的长度和土壤矿物学.
对矿物质-PFAS静电相互作用的计算提供了对PFAS命运和运输的更准确的理解.
这项研究有助于制定更好的策略来管理农业环境中的PFAS污染.

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