Multifunctional Ion-Exchange Membranes for Simultaneous Water Desalination and Selective Solute Recovery
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Securing adequate, sustainable supplies of clean water at affordable costs is an enormous challenge facing humanity. Membrane-based technologies will play a key role in addressing our rapidly growing water needs due to their energy efficiency, operational simplicity, and small footprint. Membranes with enhanced selectivity and/or additional functionality could eliminate the need for multiple energy intensive separation steps and enable efficient water treatment. This presentation will discuss the design and transport properties of multifunctional composite membranes that enable simultaneous water desalination and specific solute recovery. The composite membranes were designed by incorporating highly selective porous aromatic frameworks (PAFs) within the network of cross-linked ion-exchange membranes. The case study of boron removal during desalination via electrodialysis will be discussed with an emphasis on understanding the influence of the PAFs on transport properties of the composite membranes.