受afff影响的混凝土垫块降雨径流中的全氟和多氟烷基物质：一项实地模拟研究

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters Pub Date : 2024-11-28 DOI:10.1016/j.hazl.2024.100137

Phong K. Thai , Jeffrey T. McDonough , Trent A. Key , Anita Thapalia , Scott Porman , Pritesh Prasad , Stephanie Fiorenza , Hirozumi Watanabe , Craig M. Barnes , Jochen F. Mueller

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引用次数: 0

摘要

在许多实验室研究中，已观察到保留在硬景观中的全氟烷基和多氟烷基物质（PFAS）随着时间的推移会浸出。本研究的目的是在农田尺度上测量受历史AFFF使用影响的混凝土垫块降雨径流中关键PFAS的释放。在5 m2 （1 ×5 m）样地连续3天进行降雨模拟。每2 分钟收集一次径流水，并分析与AFFF相关的5种PFAS。雨水径流试验后，在小区内采集混凝土表面试样。全氟辛烷磺酸（PFOS）在混凝土中的浓度最高（高达~ 4000 μg kg−1），径流水中的浓度最高（高达500 μg L−1），其次是6:2氟端聚体磺酸（6:2 FTS）。径流水中PFAS浓度在第一个样品中较高，在每个降雨模拟的连续样品中依次下降。据估计，每次降雨事件中，混凝土表面总PFAS质量对径流样品的贡献百分比从0.006 % （PFOS）到0.031 % （PFHxA）不等。这表明受afff影响的混凝土中低但持续的PFAS浸出到径流水中。我们的研究结果证实，受AFFF遗留使用影响的混凝土可能是径流水中PFAS的次要来源，并强调了实验室和现场尺度降雨模拟之间的一些异同。

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Per- and polyfluoroalkyl substances in rainfall runoff from an AFFF-impacted concrete pad: A field simulation study

Per- and polyfluoroalkyl substances (PFAS) retained within hardscape have been observed to leach over time in numerous laboratory studies. The aim of this study was to measure the release of key PFAS in rainfall runoff from a concrete pad impacted by historical AFFF use at the field-scale. Rainfall simulations were conducted on a 5 m² (1 ×5 m) plot for 3 consecutive days. Runoff water was collected every 2 minutes and analyzed for 5 PFAS commonly associated with AFFF. Surface samples of the concrete were collected from the plot after the rainfall runoff experiment. Perfluorooctane sulfonate (PFOS) exhibited the highest concentrations within the concrete (up to ∼4000 μg kg⁻¹) and runoff water (up to 500 μg L⁻¹), followed by 6:2 fluorotelomer sulfonate (6:2 FTS). PFAS concentrations in runoff water were higher in the first sample and then decreased in the consecutive samples of each rainfall simulation. It is estimated that the percentage of the total PFAS mass within the surface of the concrete contributing to runoff samples ranged from 0.006 % (PFOS) to 0.031 % (PFHxA) per rainfall event. This suggests low but sustained PFAS leaching from AFFF-impacted concrete into runoff water. Our findings confirmed that concrete impacted by legacy use of AFFF is a likely secondary source of PFAS in runoff water and highlight some similarities and differences between laboratory- and field-scale rainfall simulations.

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来源期刊

Journal of hazardous materials letters Pollution, Health, Toxicology and Mutagenesis, Environmental Chemistry, Waste Management and Disposal, Environmental Engineering

CiteScore

10.30

自引率

0.00%

发文量

审稿时长

20 days