比较生物固体修改和未修改的农业土壤中的微塑料含量
Nicholas V Letwin1, Adam W Gillespie1, Joel D Csajaghy1
1School of Environmental Sciences, University of Guelph, 50 Stone Rd E, Guelph, ON N1G4W2, Canada. prosserr@uoguelph.ca.
Environmental science. Processes & impacts
|January 6, 2026
概括
生物固体应用显著增加农业土壤中的微塑料 (MP) 污染,引入更多的MP并改变它们的组成,主要是用聚纤维. 这凸显了对陆地生态系统的风险.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 生态毒理学 生态毒理学
背景情况:
- 生物固体是微塑料 (MP) 的一个主要环境来源.
- 生物固体应用对农田土壤MP含量的影响尚不清楚.
- 农业土壤是粮食生产和环境健康的关键生态系统.
研究的目的:
- 为了比较生物固体修改与未经修改的农业土壤中的微塑料含量.
- 调查生物固体类型和应用率对土壤MP水平的影响.
- 在修改和未修改的土壤中描述微塑料的组成.
主要方法:
- 在安大略省南部的11个经过生物固体修改和9个未经修改的农田采样.
- 微塑料丰富度的量化 (MP kg-1). 微塑料丰富度的量化
- 对微塑料成分的分析,重点是聚合物类型 (例如,聚,聚烯).
主要成果:
- 与未经修改的场 (775 ± 50.97 MP kg-1) 相比,生物固体修改的场显示出明显更高的MP度 (2441.82 ± 268.03 MP kg-1).
- MP的丰度与生物固体的应用类型和速率相关,除水生物固体的度更高.
- 生物固体修改增加了土壤纤维含量,在修改后的土壤中,主要的聚合物类型转向聚,而未经修改的土壤则由聚烯主导.
结论:
- 生物固体修正案是农业土壤中微塑料污染的重要贡献者.
- 了解生物固体对PM的污染对于评估对陆地生态系统的风险至关重要.
- 生物固体的类型和应用率影响土壤微塑料的数量和组成.
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