具有异质来源的聚乙烯微塑料产生的 (II) 载体作用的比较评估
Zi-Wei Chen1, Bing-Yu Chen2, Qian Wang2
1School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, PR China; College of Environment, Hohai University, Nanjing 210098, PR China.
Journal of hazardous materials
|August 28, 2025
概括
(II) 污染的微塑料来源问题 不同的聚乙烯微塑料 (MP) 对Cd(II) 吸附和脱吸有不同的影响,影响环境行为.
科学领域:
- 环境科学
- 材料科学
- 化学学
背景情况:
- 微塑料是来自不同来源的普遍环境污染物.
- 污染源的异质性经常被忽视,影响了它们在污染物运输中的作用的预测.
- 了解MP源变化对于有效的环境管理策略至关重要.
研究的目的:
- 研究微塑料源异质性对 (II) (Cd(II)) 载体效应的影响.
- 阐明不同类型的聚乙烯微塑料 (PE-MP) 如何影响Cd(II) 的吸附和脱附.
- 通过MPs修改的Cd (II) 污染模式提供见解.
主要方法:
- 使用三种类型的PE-MP进行了批量吸附实验:瓶 (BPE),浸粉 (IPE) 和包装/袋 (PPE).
- 考虑了环境因素 (pH,酸存在).
- 使用仪器描述 (FTIR) 和理论模拟 (DFT,MD) 来分析机制.
主要成果:
- 在BPE,IPE和PPE之间观察到Cd (II) 载体效应的显著差异.
- 个人防护用品呈现出最高的Cd (II) 吸附性,BPE呈现出最灵活的脱吸性,而个人防护用品呈现出每单位表面积最大的吸附性.
- 吸附遵循弗洛伊德利希和伪二阶模型,表明物理相互作用,并且通过增加pH和酸增强.
结论:
- 微塑料源异质性显著影响Cd (II) 吸附和脱吸行为.
- MP 的物理特性和表面特征受其来源的影响,决定了它们的污染物承载能力.
- 这些研究结果支持开发以来源为目标的微塑料管理策略.
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