(535c) Selective Ion Transport through Mixed Matrix Ion Exchange Membrane

The selective transport of individual ion species has been achieved through the incorporation of solid-state conducting materials into the matrix of polymeric ion exchange membranes. In these membranes, the solid-state conductors provide a highly-selective pathway for target ions, while the surrounding polymeric matrix provides a mechanical support and prevents the passage of competing ion species. In this presentation we demonstrate how the incorporation of metal oxide and chalcogenide particles can facilitate the highly specific transport of phosphate, lithium, and nickel ions through ion exchange membranes using conventional electrodialysis equipment. The process enables the selective recovery of these ions from complex streams such as wastewater, brines, and leachates. We discuss membrane synthesis, transport mechanisms, and process configurations that allow for scalable extraction of individual ion species from complex streams.