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模拟微塑料在土壤和地下水中的迁移:深入了解分散和粒子属性效应

Yaqiang Wei¹, Yuling Chen¹, Xinde Cao²

¹School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.

Environmental science & technology

|August 1, 2024

概括

一个新的模型显示,土壤地下水系统中的微塑料 (MP) 迁移被灌和颗粒大小加快,影响了含水层污染. 这项研究提供了减轻地下水资源MP污染的见解.

科学领域:

环境科学环境科学
地质科学地质科学
环境工程环境工程

背景情况:

在土壤地下水系统中的微塑料 (MP) 迁移对于了解含水层污染和环境风险至关重要.
目前使用向导-分散方程的模型不能完全捕捉MP运动的复杂机制.

研究的目的:

开发和验证一种新的分散-拖拉力合模型,用于土壤-地下水系统中的微塑料迁移.
调查各种因素对微塑料运输和含水层中的度的影响.

主要方法:

开发了一种结合模型,用于微塑料迁移的吸力和分散.
使用现有的实验室和现场规模实验数据验证了模型.
对微塑料分散,灌,颗粒大小,塑料类型和含水层异质性进行了敏感性分析.

主要成果:

该模型表明,包括MP分散增加了粒子速度和含水层度.
增加的灌流量和面积显著加快了下行MP迁移.
微塑料的速度与尺寸呈现出非线性关系,达到8微米的峰值,并根据塑料类型而异 (例如,PVC的迁移率较低).
具有较低液压导电性的异质土壤结构增强了MP的分散和迁移.

结论:

开发的模型提供了一个更全面的了解微塑料在土壤地下水系统的迁移.
研究结果强调了灌,颗粒特征和土壤特性在MP运输中的重要作用.
这项研究为制定有效策略以减轻地下水中的微塑料污染提供了关键的见解.

关键词:

分散的分散性分散.微塑料微塑料的使用移民移民迁移迁移建模建模是什么意思土壤−地下水系统

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