从AFFF影响的青中PFAS的分布和释放:它与混凝土相比如何?
Yijing Li1, Trent A Key2, Phong H N Vo3
1Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, QLD 4102, Australia.
Journal of hazardous materials
|February 1, 2024
概括
受水性薄膜形成泡 (AFFF) 影响的青和混凝土可以将和多基物质 (PFAS) 浸出到环境中. 青显示PFAS释放率高于混凝土,这表明它具有更高的释放率.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 污染物水文学污染物水文学
背景情况:
- 水性薄膜形成泡 (AFFF) 含有和多基物质 (PFAS),它们是持久的环境污染物.
- 受AFFF影响的青和混凝土表面可以通过表面漏作为PFAS的二次来源.
- 了解PFAS的垂直分布和这些材料的释放对于环境风险评估至关重要.
研究的目的:
- 调查PFAS在AFFF影响的青和混凝土内核的垂直分布.
- 在模拟降雨条件下,从这些材料中量化PFAS的表面释放.
- 为了比较PFAS从青和混凝土中的释放率.
主要方法:
- 从各种现场地点收集AFFF影响的青和混凝土核心.
- 在核心的不同层 (0-0.5厘米表面层) 中分析PFAS度.
- 进行三次降雨模拟,以测量PFAS流量,并计算释放系数.
主要成果:
- 6:2二醇硫酸盐 (6:2 FTS) 是混凝土表面和流水中度最高的PFAS.
- perfluorooctane 硫酸 (PFOS) 是青表面和流水中度最高的 PFAS.
- 与混凝土 (1-5 m-2) 相比,青的PFAS释放率 (4-16 m-2) 显著更高.
结论:
- 受AFFF影响的青和混凝土已被证实是PFAS对环境的二次来源.
- 与混凝土相比,青显示出 PFAS 释放的可能性更大.
- 这些发现凸显了管理被AFFF污染的基础设施的重要性,以减轻PFAS环境污染.
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