Water reuse is one of the solutions to prevent depletion of freshwater resources; however, it is often limited by accumulation of specific ions in the recirculating water. Therefore, it is necessary to develop ion selective desalination technologies to remove these specific ions. Electrodialysis (ED) is an electrically driven membrane desalination process in which ion transfer takes place as a result of electro-migration and diffusion across the membranes. The aim of this project is to improve theoretical understanding of ion transport mechanisms and their effect on ion selectivity in ED, to develop an ion selective ED process and to investigate possible industrial applications of the developed process.