微塑料特性和溶解有机物对土壤和水性介质中的可用性的影响
Runze Wang1, Lin Yang2, Miaomiao Guo1
1State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, Shaanxi, China.
Environmental pollution (Barking, Essex : 1987)
|October 23, 2023
概括
农业土壤中的微塑料 (MP) 显著降低了的可用性,特别是更小,更缩的颗粒. 酸可以减轻这些影响,改善土壤和水中的含量.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 农业科学 农业科学
背景情况:
- 塑料覆盖膜和化肥在农业中很常见,导致微塑料 (MP) 和 (P) 积累.
- 微塑料对土壤和水中的含量的影响在很大程度上是未知的.
研究的目的:
- 研究微塑料特性对土壤和水性介质中的可用性的影响.
- 确定微塑料的类型,大小和度如何影响植物可用的 (Olsen-P) 和P吸附.
主要方法:
- 实验室实验使用农业土壤和受各种微塑料 (聚乙烯,聚乙烯,聚乳酸) 污染的水性介质进行.
- 在土壤中测量了可用 (Olsen-P).
- 在水性介质中确定吸附能力和分布系数 (Kd).
- 此外,还评估了酸的作用.
主要成果:
- 微塑料显著减少了土壤的Olsen-P,可生物降解的MPs比传统的MPs (9.7-38.6%) 减少了更多 (38.4-73.6%).
- 较小 (25微米) 和更缩 (5%) 的MP对土壤产生更强的负面影响.
- 微塑料表现出强烈的P吸附,减少了水中的P可用性;传统的MP吸附的P比生物降解的MP多.
- 富尔维酸增加了土壤中的Olsen-P,并通过减少MP吸附来提高了水中的P可用性.
结论:
- 微塑料污染对农业生态系统中的可用性构成重大风险.
- 了解微塑料,和土壤有机物之间的相互作用对于可持续的农业和环境管理至关重要.
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