聚乙烯微塑料在和多孔介质中的运输:功能群的影响和溶液化学
Qiang Ma1, Yingying Sun2, Shi Zhou3
1Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710075, PR China; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China; Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an, Shaanxi, 710021, PR China.
Journal of environmental management
|February 28, 2025
概括
表面功能组和溶液化学显著影响微塑料 (MP) 在多孔介质中的运输. 氨基基改性MP显示出比预期更高的流动性,影响地下水污染风险.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料 (MPs) 污染是一个日益严重的全球问题.
- 自然老化改变了MP表面的特性,影响了它们的环境传输.
- 了解多孔介质中的功能化MP行为至关重要.
研究的目的:
- 研究功能化聚烯微塑料 (PSMP) 在和多孔介质中的运输.
- 分析表面功能化和溶液化学 (离子强度,离子价值,pH) 对PSMP迁移的综合影响.
- 确定MPs对地下水污染的影响.
主要方法:
- 使用非功能化 (PS-Bare),碳素修饰 (PS-COOH) 和氨基修饰 (PS-NH2) PSMPs 的列实验.
- 多种溶液化学参数:离子强度,阴离子价值 (Al3+) 和pH.
- 测量了PSMP迁移,泽塔潜力和水力动力学尺寸.
主要成果:
- 表面功能组和溶液化学协同影响了PSMP迁移.
- 增加的离子强度和离子价值通常会减少迁移.
- pH影响PSMP的电荷和移动性;PS-NH2的移动性高于预期,这是由于表面位点相互作用造成的.
- 在Al3+中,PSMP的恢复率为PS-NH2 (94.60%) >PS-COOH (41.48%) >PS-Bare (41.12%).
结论:
- 表面功能化和溶液化学是控制微塑料运输的关键因素.
- 功能化的MP对地下水质量构成复杂的风险.
- 需要进一步的研究才能充分了解MP的命运和在地下环境中的运输.
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