Data underlying the publication: Water and co-ion transport across ion-exchange membranes coated with PAH/PSS polyelectrolyte multilayer in electrodialysis and diffusion dialysis

This dataset was collected at the Laboratory of Environmental Technology, Wageningen University &amp; Research in 2024/2025. It is supplementary data for the PhD thesis of A.A.E. Elozeiri and the publication of "Water and co-ion transport across ion-exchange membranes coated with PAH/PSS polyelectrolyte multilayer in electrodialysis and diffusion dialysis”.<br>We investigated the influence of polyelectrolyte multilayer coatings on the transport of water, anions (chloride/sulfate/hydroxide), and cations (sodium/magnesium) across cation-exchange membranes in electrodialysis and diffusion dialysis applications. Polyelectrolyte multilayers were deposited via the layer-by-layer technique on cation-exchange membranes to enhance the membrane selectivity towards monovalent cations over multivalent ones. The applied polyelectrolytes were PAH (poly(allylamine)) as polycation, and PSS (poly(4-styrenesulfonate)) as polyanion. The current-voltage responses of the membranes were characterized using cyclic voltammetry and chronopotentiometry.<br>This research was performed within the framework of the research program AquaConnect, funded by the Dutch Research Council (NWO, grant-ID P19-45) and public and private partners of the AquaConnect consortium and coordinated by Wageningen University and Research.