一个双路径建模框架,用于雨水驱动的微塑料在土壤-水系统的运输
Chenrui Zhao1, Lei Hou1, Chengliang Li2
1College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an 271018, China; Shandong Key Laboratory of Agricultural Water-saving Technology and Equipment, Shandong Agricultural University, Tai'an 271018, China.
Journal of hazardous materials
|March 6, 2026
概括
土壤中的微塑料 (MP) 运输受到降雨强度和MP类型的影响. 聚烯MP水平移动,聚乙烯MP透最深,聚乙烯甲酸MP强烈吸附于土壤,影响环境命运.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 聚合物科学 聚合物科学
背景情况:
- 土壤水系统中的微塑料 (MP) 污染是一个日益严重的环境问题.
- 了解土壤中不同类型的MP (聚乙烯,聚烯,聚乙烯二甲) 的吸附和运输行为对于评估它们的环境命运至关重要.
研究的目的:
- 系统地研究PE,PP和PETMPs在沙土土壤中的吸附机制和运输行为.
- 开发一个定量模型来预测雨量驱动的MP运输.
- 分析降雨模式对MP迁移的影响.
主要方法:
- 利用DLVO理论,吸附动力学和异热实验来研究MP-土壤相互作用.
- 使用模拟降雨测试来评估MP运输动态.
- 开发了一种新的双路径定量模型,并修改了MP迁移的指数衰减模型.
主要成果:
- 在土壤中MP吸附遵循伪二次动力学,最好用弗洛伊德利希等温法来描述.
- PET MPs表现出最强的土壤吸附能力,导致在浅层土壤中保留.
- 降雨强度显著影响了MP的透和传输;更高的强度/更短的持续时间减少了迁移.
- 由于浮力,PP议员表现出高水平的流动性,而PE议员表现出最深的垂直透.
结论:
- 土壤中的MP迁移受到降雨模式和MP材料特性的强烈影响.
- 开发的定量模型为预测陆地环境中的MP路径提供了强大的框架.
- 调查结果为减轻土壤生态系统中微塑料污染的有针对性的战略提供了信息.
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