elektroodialüüs

Elektroodialüüs, often abbreviated as ED, is an electrochemical separation process that utilizes ion-exchange membranes and an electric field to remove ions from a solution. In this process, an electric potential is applied across a stack of alternating cation-exchange and anion-exchange membranes. When an electrolyte solution flows through the channels between these membranes, positively charged ions (cations) migrate towards the negative electrode and negatively charged ions (anions) migrate towards the positive electrode. The ion-exchange membranes selectively allow ions of a specific charge to pass through while blocking ions of the opposite charge. This selective permeability, driven by the electric field, results in the separation of ions from the bulk solution into concentrate streams, leaving behind a purified or demineralized diluate stream. The rate of ion removal is directly proportional to the applied voltage and the concentration of ions in the feed solution. Elektroodialüüs is commonly used for water demineralization, desalination, and the recovery of valuable ions from industrial wastewater. Its efficiency and cost-effectiveness make it a viable alternative to other separation technologies in various applications.