垃圾填埋场有机物中PFAS的独特分布模式
Biraj Saha1, Mohamed Ateia2, Thabet Tolaymat3
1Department of Civil, Construction and Environmental Engineering, North Dakota State University, Fargo, ND 58102, United States.
Journal of hazardous materials
|September 1, 2024
概括
在垃圾填埋场的有机物中积聚了和多基物质 (PFAS),其度因深度而异. 总的PFAS与有机物相关,表明了复杂的填埋场命运过程.
科学领域:
- 环境化学环境化学
- 地质化学 地质化学
- 废物管理 废物管理
背景情况:
- 和多醇基物质 (PFAS) 是在降解垃圾填埋场废物中发现的持久性环境污染物.
- 了解垃圾填埋场有机物中的PFAS分布对于评估环境风险至关重要.
研究的目的:
- 分析垃圾填埋场有机物中的PFAS度和分布,在不同深度和位置进行分析.
- 为了确定垃圾填埋环境中占主导地位的PFAS类别和化合物.
- 调查PFAS,有机物特性和垂直分层之间的关系.
主要方法:
- 在各种深度和位置采样垃圾填埋场有机物质.
- 使用分析化学技术量化六个类的29种PFAS化合物的量化.
- 统计分析,包括相关性和多变量分析,以评估关系和来源.
主要成果:
- 有机物中的PFAS度在6.71至73.06μg/kg-1.1之间.
- perfluorocarboxylic 酸 (PFCAs) 和 fluorotelomer carboxylic 酸 (FTCAs) 是主要的 PFAS 类.
- 观察到显著的垂直分布,在中深 (20-35英尺) 处的PFAS度更高.
- 在总PFAS,总碳和溶解有机物之间发现了强烈的正相关性.
结论:
- 垃圾填埋场有机物中的PFAS分离是显著的,受有机物质含量的影响.
- PFAS的垂直分层表明深度依赖的转化和运输过程.
- 系统层面的方法对于了解垃圾填埋场中的PFAS命运至关重要,考虑到废物的成分和化学性质.
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