微塑料老化对pyrifos吸附-脱落和微塑料生物度的影响
Hui Ju1, Xiaomei Yang2, Rima Osman1
1Soil Physics and Land Management, Wageningen University & Research, 6700AA, Wageningen, the Netherlands.
Environmental pollution (Barking, Essex : 1987)
|May 29, 2023
概括
紫外线老化微塑料 (MPs) 吸附更多的pyrifos (CPF) 并作为比原始MP更强大的载体. 衰老过程改变了虫中的MP生物度,特别是在富含碳和的土壤中.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 聚合物科学 聚合物科学
背景情况:
- 土壤中的微塑料 (MP) 经历老化过程 (光衰老,磨损,生物降解),改变其表面特性.
- 塑料覆盖膜是农业土壤中MPs的重要来源.
- pyrifos (CPF) 是一种常见的农药,其环境命运可以受到国会议员的影响.
研究的目的:
- 调查CPF在原始和紫外线老化低密度聚乙烯 (LDPE) 和可生物降解 (Bio) MPs上的吸附-脱落.
- 评估原始和老年MPs (LDPE和Bio-MPs) 在 (Lumbricus terrestris) 中的CPF和没有CPF的生物度.
- 了解土壤老化条件对MP生物度的影响.
主要方法:
- 在原始和紫外线老化的LDPE和Bio-MPs上进行了CPF的吸附-脱附实验.
- 生物度研究使用暴露于原始和老年MP的虫,有或没有CPF.
- 在不同老化条件下 (紫外线,土壤类型) 在虫件中分析MP度.
主要成果:
- 与原始MP相比,紫外线老化的MP表现出更高的CPF吸附能力.
- 紫外线老化的LDPE-MP显示CPF脱吸率低于原始的CPF;生物MP的脱吸率非常低.
- 紫外线衰老的MP在虫体中度较低,但吸附CPF的MP显示出更高的生物度. 在土壤中老化的LDPE-MP (高C:N比率) 在造物中更集中.
结论:
- 紫外线老化的MP是土壤生态系统中CPF传输的更有效的载体.
- 微塑料的老化显著影响MP的生物度,CPF和土壤性质的综合影响.
- 需要对碳和丰富土壤中的老年国会议员和污染物进行进一步的研究.
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