美国加州大学伯克利分校Jeffrey R. Long团队报道了多功能吸附膜的离子捕获电渗析策略。相关研究成果于2021年4月15日发表在国际知名学术期刊《科学》。

为了满足全球对清洁水资源日益增长的需求，需要能够有效净化非传统水源的技术。水处理厂通常需要一系列昂贵的分离装置来实现脱盐和去除有毒微量污染物，如重金属和硼。

研究人员报道了一系列功能强大、选择性好、可调的具有嵌入离子交换聚合物中的多孔芳香族骨架纳米颗粒的吸附膜，并展示了膜在高效一步分离策略中的应用，即离子捕获电渗析。该过程使用带有吸附膜的电渗析结构来淡化复杂水源的同时捕获不同的目标溶质，而对竞争离子的捕获可以忽略不计。

该方法适用于开发利用吸附膜的高效和选择性多功能分离。

附：英文原文

Title: Ion-capture electrodialysis using multifunctional adsorptive membranes

Author: Adam A. Uliana, Ngoc T. Bui, Jovan Kamcev, Mercedes K. Taylor, Jeffrey J. Urban, Jeffrey R. Long

Issue&Volume: 2021/04/16

Abstract: Technologies that can efficiently purify nontraditional water sources are needed to meet rising global demand for clean water. Water treatment plants typically require a series of costly separation units to achieve desalination and the removal of toxic trace contaminants such as heavy metals and boron. We report a series of robust, selective, and tunable adsorptive membranes that feature porous aromatic framework nanoparticles embedded within ion exchange polymers and demonstrate their use in an efficient, one-step separation strategy termed ion-capture electrodialysis. This process uses electrodialysis configurations with adsorptive membranes to simultaneously desalinate complex water sources and capture diverse target solutes with negligible capture of competing ions. Our methods are applicable to the development of efficient and selective multifunctional separations that use adsorptive membranes.

DOI: 10.1126/science.abf5991

Source: https://science.sciencemag.org/content/372/6539/296