微塑料对粘土,沙,泥土强度参数的影响:比较评估
1Department of Civil Engineering, Symbiosis Institute of Technology (SIT), Symbiosis International (Deemed University) (SIU), Pune, India.
The Science of the total environment
|June 23, 2024
概括
这项研究揭示了微塑料污染对土壤特性产生重大影响,沙土是受影响最严重的. 聚乙烯 (PVC) 和低密度聚乙烯 (LDPE) 微塑料在所有土壤类型中造成了切割强度的最大降低.
科学领域:
- 地质技术工程 地质技术工程
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料污染是一个日益严重的环境问题.
- 关于不同微塑料在不同类型土壤上的比较影响的研究有限.
- 了解这些影响对于土壤整治和管理至关重要.
研究的目的:
- 为了比较评估LDPE,HDPE和PVC微塑料对沙土,泥土和粘土土的索引和强度特性的影响.
- 在30天内分析不同微塑料度 (2%,4%,6%) 的影响.
- 为了确定哪种土壤类型和微塑料类型表现出最显著的变化.
主要方法:
- 对土壤属性的实验研究,包括含水量,比重,阿特伯格极限,最佳含水量,最大干密度和剪切强度参数.
- 对受微塑料污染的土壤 (LDPE,HDPE,PVC) 与对照样本进行比较分析.
- 在5,10,15,20,25和30天的观察日内系统地收集数据.
主要成果:
- 粘土土壤显示了阿特伯格极限最显著的耗尽 (高达168%的液体极限与PVC).
- 沙地土壤在最大干密度 (0.59 g/cc) 和剪切强度 (0.89 kg/cm2) 中经历了最大的减少.
- 在沙性土壤中,PVC和LDPE微塑料造成了最大的水分含量和剪切强度的减少.
结论:
- 沙地土壤最容易受到微塑料污染,其次是粘土土壤,然后是泥土土壤.
- 微塑料污染通常会降低土壤的剪切强度,而PVC和LDPE的影响最为明显.
- 该研究强调,需要制定战略来减轻土壤中的微塑料污染.
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