The working principle of cation exchange resin

The working principle of cation exchange resin is based on ion exchange reaction, and its core lies in the exchange of active groups on the resin with cations in the solution. Cation exchange resins usually carry positive charges, which interact electrostatically with cations in the solution, causing the cations to be adsorbed onto the resin. At the same time, the exchange groups on the resin (such as sulfonic acid or carboxylic acid groups) undergo ion exchange reactions with the adsorbed cations, desorbing the cations from the resin, thereby achieving the separation and removal of cations