Data underlying the publication: On-site affordable acid and base production from seawater using bipolar membrane electrodialysis: ion transport and polyelectrolyte multilayer coating

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 " On-site affordable acid and base production from seawater using bipolar membrane electrodialysis: ion transport and polyelectrolyte multilayer coating".<br>We investigated the direct use of seawater in a bipolar membrane electrodialysis (BMED) process to produce acids and bases. The current and energy efficiency of a bipolar membrane electrodialysis stack were analyzed, where the starting salt stream was 0.5 M NaCl or synthetic seawater. Moreover, the current-voltage responses of the used membranes were characterized in a 6-compartment electrodialysis cell via cyclic voltammetry. Using synthetic seawater as the salt stream in a conventional BMED stack resulted in inorganic scaling inside the BMED stack. To mitigate the inorganic scaling, we coated the cation-exchange membranes with a polyelectrolyte multilayer (i.e., PAH/PSS) to limit the transport of multivalent cations from the salt to the base compartment.<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.