通过等离子体修饰的微塑料促进Cd的运输:表面功能组和相互作用机制的影响
Yantian Ji1, Duo Xu1, Shuangyun Bai1
1College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
Environmental pollution (Barking, Essex : 1987)
|June 6, 2025
概括
介电屏障放电 (DBD) 的等离子处理增强了 (Cd) 的微塑料 (MP) 吸附,增加了它们在水中运输污染物的潜力. 需要进一步研究等离子体治疗的MP的长期生态影响.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 环境化学环境化学
背景情况:
- 排放等离子提供了先进的氧化特性,用于污染物在水中的降解.
- 微塑料 (MPs) 耐受于血降解,可以充当污染物载体.
- 了解等离子体处理的MP和重金属之间的相互作用对于环境风险评估至关重要.
研究的目的:
- 研究微塑料 (MPs) 与 (Cd(II)) 在介电屏障放电 (DBD) 等离子处理前后的吸附和共运行为.
- 为了阐明增强Cd(II) 吸附在血治疗的MPs背后的机制.
- 评估等离子治疗对Cd (II) 运输中的MPs载体作用的影响.
主要方法:
- 进行了批量和列实验来研究MP-Cd (II) 相互作用.
- 密度函数理论 (DFT) 的计算被用来分析吸附机制.
- 德贾古因-兰多-维维-奥弗比克 (DLVO) 理论被应用来解释运输行为.
主要成果:
- 由于移植的极性功能组,用等离子体处理的MP显示出显著增强的Cd的吸附能力.
- DFT计算表明,在用等离子体治疗的MP中,降低了固体阻碍和更强的分子间相互作用 (键,范德瓦尔斯键).
- 共同输送实验表明,用等离子体处理的MPs促进了Cd (II) 输送,减轻了其沉积.
结论:
- 介电屏障放电 (DBD) 的等离子处理改变了MP表面,增强了它们对Cd的亲和力.
- 经过等离子处理的MP作为有效的载体,促进Cd的运输在水环境中.
- 这些发现强调了与等离子体处理的MPs相关的潜在环境风险,并强调了需要进行长期生态影响研究的必要性.
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