功能化复合纳米纤维膜用于选择性类固醇激素微污染物从水中吸收:环极类型的作用
Alessandra Imbrogno1, Han Ya Lin1, Akhil Gopalakrishnan1
1Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany.
Water research
|October 8, 2024
概括
在纳米纤维膜中的β-cyclodextrins (βCD) 与α (αCD) 和γ (γCD) 类型相比,显示出较高的类固醇激素 (SHs) 清除能力. 这是由于更强,更稳定的包容复合,增强SH微污染物从水中吸收.
科学领域:
- 环境科学与工程环境科学与工程
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
背景情况:
- 类固醇激素 (SHs) 是水中的持久微污染物.
- 循环脱素 (CDs) 是通过包容复杂化对SH去除有前途的.
- 纳米纤维复合膜为基于CD的水处理提供了一个平台.
研究的目的:
- 研究不同类型 (α,β,γ) 的环极 (CD) 对类固醇激素 (SH) 复合和去除效率的影响.
- 为了评估CD-trapped纳米纤维膜对SH微污染物吸收的性能.
- 使用计算方法阐明调控SH-CD复合的分子相互作用.
主要方法:
- 纳米纤维复合膜的制造,通过电回旋捕获交叉链接的环极 (αCDP, βCDP, γCDP).
- 热重力测量分析 (TGA) 来确认CD的捕获和稳定性.
- 在不同类型的CD中对SH去除效率的实验评估.
- 分子动力学 (MD) 模拟和量子化学计算以分析复合稳定性和能量学.
主要成果:
- 纳米纤维膜成功地在过过程中没有损失地捕获了CD.
- βCDP膜表现出最高的SH去除率 (高达74%的孕激素),选择性受SH类型的影响.
- MD模拟表明与βCDP具有更强,更稳定的纳入复合体,其空间分布更紧密,溶解能量较低 (+6.0 kcal/mol),与γCDP (+8.3 kcal/mol) 和αCDP (-4.9 kcal/mol相互作用能量但分布更广泛) 相比.
结论:
- 环极的类型显著影响从水中去除类固醇激素的选择性和效率.
- β-Cyclodextrin (βCD) 在与SHs形成稳定的包容复合物方面表现出卓越的性能,使其成为设计选择性吸附膜的最合适的CD.
- 将实验过数据与分子动力学模拟相结合,为优化微污染物清除材料提供了一个强大的框架.
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