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经微环境调节的UiO-67基金属有机框架,用于有效地从水中去除化酸

Xiaoxia Zhang¹, Xinyuan Zeng¹, Meng Rong²

¹College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.

Journal of hazardous materials

|September 18, 2025

概括

一种基于Zr的新型金属有机框架,UiO-67-2CF3,有效地从水中去除短链甲基碳酸 (PFCAs). 这种先进的吸附剂显示了PFCA修复的高容量和快速动力学.

科学领域:

材料科学:开发先进的多孔材料,用于环境修复.
环境化学:研究水生系统中的污染物去除机制.

背景情况:

短链 perfluoroalkyl carboxylic 酸 (PFCAs) 是一种持续性环境污染物.
在受污染的地下水中有效地修复PFCAs存在重大挑战.

研究的目的:

合成和评估基于UiO-67的金属有机框架 (MOF) 用于短链PFCA去除.
为了研究工程MOF的吸附机制和性能,以对 perfluorohexanoic acid (PFHxA) 进行整治.

主要方法:

合成UiO-67系列MOFs (UiO-67-H,UiO-67-NH2,UiO-67-2CF3) 使用调制策略与甘氨酸化物.
描述MOF属性,包括孔隙结构,表面电荷和功能组.
吸附实验以确定PFHxA的去除能力,动力学,选择性和可回收性.
连续列突破实验和密度函数理论 (DFT) 计算以阐明机制.

主要成果:

UiO-67-2CF3 呈现出 1386 mg/g 的 PFHxA 吸附能力和快速吸附动力学 (4 分钟).
该材料在从水溶液中去除PFHxA方面表现出极好的选择性和可回收性.
连续列实验显示PFHxA从1μg/L有效降低到10 ng/L以下.
已发现的吸附机制包括静电相互作用,F···F相互作用,易斯酸相互作用,阴离子-π,CF3-π相互作用和结合.

结论:

UiO-67-2CF3是一种非常有前途的材料,用于修复短链PFCA污染的水.
该研究提供了关于先进吸附剂的合理设计,以有效地去除PFCA的见解.
工程化MOF为解决PFCA带来的环境威胁提供了可行的解决方案.

关键词:

化学微环境法规化学微环境法规有缺陷的MOFs.在PFHxA吸附过程中.短链 perfluoroalkyl carboxylic 酸的短链 perfluoroalkyl carboxylic 酸是什么意思在UiO-67中,UiO-67为UiO-67.

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