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通过具有高选择性和稳定性的金属有机框架膜有效地去除基和多基物质

Kunpeng Zhang¹, Peng Cheng¹, Yanling Liu¹

¹State Key Laboratory of Pollution Control and Resources Reuse, Tongji Advanced membrane Technology Center, Tongji University, Shanghai 200092, PR China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai, 200092, PR China.

|August 18, 2024

概括

一种新的聚胺改性金属有机框架 (MOF) 膜有效地从水中去除和多基物质 (PFAS). 这种先进的膜显示了短链PFAS的高排斥率和出色的稳定性,为水处理提供了有希望的解决方案.

科学领域:

材料科学材料科学材料科学
环境工程环境工程
化学工程是化学工程的重要组成部分.

背景情况:

由于其持久性,和多基基物质 (PFAS) 构成重大健康风险.
传统的膜分离方法用于PFAS去除通常受到有限的效率和稳定性的困扰.
开发用于有效的PFAS整治的先进材料对于水处理至关重要.

研究的目的:

开发一种新型的金属有机框架 (MOF) 膜,其性能提高,用于清除和多基物质 (PFAS).
调查修改膜的去除机制和稳定性.
评估用于实际水处理应用的抗污染性能.

主要方法:

通过界面聚合,制造一种具有局部聚胺 (PA) 修饰的新型MOF膜.
使用MOF纳米片构建层状膜.
膜结构的特征,表面电荷,水友性和孔径大小.
评估PFAS清除效率 (11种类型),水透度,稳定性 (超声波处理,连续过) 和防性能.

主要成果:

经过PA修改的MOF膜证明有效地去除了11种PFAS类型,短链PFAS的排斥率超过84%.
实现了 21.4 L·m−2·h−1·bar−1.4 的高水透率.
与传统膜相比,表现出增强的结构完整性,120小时以上的稳定分离效率,以及优越的防腐性能.

结论:

新型PA修饰的MOF膜提供了一种高性能解决方案,可以有效地从水中去除PFAS.
膜的密集结构,强大的负面电荷和增强的水友性有助于其优越的分离和抗 capabilities.
这一发展解决了在PFAS水处理中对有效和稳定的膜的关键需求.

关键词:

界面聚合的介面聚合.金属-有机框架的框架.纳米过膜是一种纳米过膜.和多醇基物质是多和多的.移除效率移除效率移除效率移除效率

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