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在生物聚合物修改的多孔介质中增强微塑料的保留:从孔尺度可视化中的洞察力
Zi Wang1, Jin Liu1, Gang Zhang2
1School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China.
Journal of hazardous materials
|November 9, 2025
概括
植物生物聚合物有效捕获土壤和地下水中的微塑料 (MP). 这种生物聚合物形成了水凝网络,大大减少了MP的运输,并为环境修复提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 土壤科学 土壤科学
背景情况:
- 微塑料 (MP) 是土壤和地下水中普遍存在的环境污染物.
- 它们的小规模和移动性构成生态风险,需要有效的控制策略.
- 极其需要可持续的方法来限制多孔介质中的MP传输.
研究的目的:
- 研究植物生物聚合物 (BDH) 在提高微塑料在多孔介质中的保留效果.
- 为了阐明微塑料在不同条件下的运输和保留机制,使用BDH修改.
- 为减轻微塑料污染的绿色战略提供科学基础.
主要方法:
- 使用孔尺度可视化平台研究聚甲基甲酸微塑料 (PMP) 运输.
- 使用核磁共振 (NMR) 来监测孔隙结构演变.
- 系统地改变了BDH含量,PMP度,流量和和水平.
主要成果:
- 修改BDH将保留机制转移到网络捕获,显著抑制PMP传输.
- 1.5%的BDH含量实现了最大的PMP拦截率为66.5%.
- 通过结合,BDH形成了一个3D水凝网络,改变了孔隙结构并减少了PMP的移动性.
结论:
- 植物生物聚合物为控制多孔环境中的微塑料污染提供了一个有希望的,环保的方法.
- BDH的水凝网络形成和与沙子和PMP的相互作用是增强保留的关键.
- 这项研究为开发针对微塑料污染的可持续解决方案提供了关键的见解.
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