在美国东北部十个农场用生物固体处理的土壤中量化PFAS
Diana Oviedo-Vargas1, Jessica Anton2, Seetha Coleman-Kammula2
1Stroud Water Research Center, 970 Spencer Rd, Avondale, PA, USA. doviedo@stroudcenter.org.
Scientific reports
|February 15, 2025
概括
生物固体的应用在农场土壤中显著增加了对基和多基物质 (PFAS). 在地表水中检测到的短链PFAS表明可能存在更广泛的环境污染,对土壤和水资源构成风险.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 农业科学 农业科学
背景情况:
- 生物固体是常见的土壤修改物,提供营养物质,但可能引入污染物.
- 和多醇基物质 (PFAS) 是有毒,可移动和生物积累的化合物.
- 农业环境中的PFAS污染对土壤,水和食品安全构成风险.
研究的目的:
- 调查美国用生物固体处理的农场中的PFAS污染情况.
- 为了比较生物固体处理土壤中的PFAS水平与未经处理的对照土壤.
- 确定影响PFAS度和处理土壤中的类型的因素.
主要方法:
- 在10个工作农场进行对照-处理设计.
- 在处理和未处理地块的土壤样本中分析PFAS度.
- 评估土壤深度,物理化学性质和生物固体来源.
- 在生物固体和土壤中评估PFAS前体和终端产品.
主要成果:
- 与对照组相比,在生物固体处理的土壤中发现了明显更高的PFAS度.
- 土壤深度,有机物,pH值和生物固体来源影响了PFAS水平和配置.
- 在经过处理的土壤中没有检测到生物固体中的PFAS前体,这表明生物转化.
- 在地表水中检测到短链PFAS,这表明其超出了农场边界的流动性.
结论:
- 生物固体的应用是农业土壤中PFAS污染的重要来源.
- PFAS的流动性,特别是短链变种,对邻近的水体构成风险.
- 了解影响PFAS在土壤中的命运的因素对于风险评估和缓解至关重要.
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