场废料堆肥中PFAS的发生和分布表明潜在的挥发性损失,向下迁移和转化
Biraj Saha1, Mohamed Ateia2, Sujan Fernando3
1Department of Civil, Construction and Environmental Engineering, North Dakota State University, 1410 14th Ave N, CIE 201, Fargo, North Dakota 58102, USA. syeed.iskander@ndsu.edu.
Environmental science. Processes & impacts
|February 5, 2024
概括
在院子垃圾堆肥中发现了高度的per-和多基物质 (PFAS). 在堆肥表面层中,PFAS水平显著下降,这表明了潜在的降解或挥发过程.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 污染物分析 污染物分析
背景情况:
- 和多醇基物质 (PFAS) 是全球发现的持久性有机污染物.
- 院子垃圾堆肥是广泛使用的土壤修饰剂,引发了对潜在PFAS污染的担忧.
- 了解堆肥中的PFAS分布对于评估环境和健康风险至关重要.
研究的目的:
- 为了量化场废弃物堆肥中的PFAS度.
- 为了确定当前占主导地位的PFAS类别和链条长度.
- 调查PFAS与塑料污染物的关联及其在堆肥堆中的垂直分布.
主要方法:
- 在院子废弃物堆肥样本中分析了六个类别的十七个目标PFAS.
- 在同时存在的低密度聚乙烯 (LDPE) 和聚乙烯四甲 (PET) 塑料中量化PFAS.
- 在一个置的成熟堆肥堆内评估垂直PFAS分布.
主要成果:
- 在院子垃圾堆肥中检测到高总PFAS度 (18.53±1.5μg kg-1).
- perfluorocarboxylic 酸 (PFCAs) 和 perfluorosulfonic 酸 (PFSAs) 是主要的 PFAS 类.
- 在LDPE和PET塑料中发现了PFAS,在堆肥后度增加;表面堆肥层显示PFAS水平明显较低.
结论:
- 院子废弃物堆肥是PFAS污染的重要来源.
- 在堆肥过程中,PFAS可能会与塑料碎片发生联系.
- 堆肥堆中的垂直分层表明PFAS的转化,挥发或浸,影响它们的环境命运.
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