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微塑料污染对土壤-水-植物动态的潜在影响

Alireza Bakhshaee¹, Peyman Babakhani², Muhammad Masood Ashiq¹

¹Department of Civil, Construction & Environmental Engineering, University of Memphis, Memphis, TN, USA.

Scientific reports

|March 22, 2025

概括

微塑料 (MP) 的污染大大改变了土壤水文,影响了水的保留. 分碎的MP增加了最多的容量,影响了农业和水动力学.

科学领域:

环境科学环境科学
土壤科学土壤科学
水文学水文学

背景情况:

微塑料 (MP) 污染是一个日益严重的环境问题.
了解MP对土壤水文学的影响对于农业的可持续性至关重要.

研究的目的:

评估高密度聚乙烯 (HDPE) 微塑料对土壤保持水分的影响.
评估MP的大小和形状如何影响土壤的容量和植物可用的水.

主要方法:

模拟了9个污染场景,使用不同的HDPE MP大小 (0.5-1, 1-3, 3-5毫米) 和形状 (纤维,薄膜,碎片) 的0.01% w/w.
分析了使用范·格努赫特模型的水缩曲线 (WRC).
评估工厂可用水 (PAW),枯点 (WP) 和水容量 (WHC).

主要成果:

微塑料显著改变了土壤的保留水曲线和植物可用的水,主要是通过影响保持水的能力.
碎片MP增加了36.3%的土壤WHC,其次是纤维 (19.8%) 和薄膜 (15.7%).
对WHC的影响随微塑料颗粒大小的增加而增加,而枯点基本保持不变.

结论:

土壤微塑料污染,特别是HDPE碎片,可以显著改变土壤的水文特性.
管理土壤PM污染对于保护植物生长,农业生产率和水资源动态至关重要.

关键词:

微塑料的形态学微塑料的形态学塑料污染塑料污染的原因土壤的液压特性土壤的液压特性土壤水文学土壤水文学

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