anion-exchange resin

An anion-exchange resin is a type of ion-exchange material that contains basic chemical groups. These groups allow the resin to attract and exchange negatively charged ions, known as anions, from a surrounding solution. Typically, these resins are synthetic polymers, often made from styrene-divinylbenzene copolymers, and they feature charged groups like quaternary ammonium salts.123

Anion-exchange resins are used in various applications, including water purification to remove unwanted anions, and in chemical analysis for separating or concentrating ionic substances. They are also employed in industrial processes like sugar purification and the recovery of valuable elements from ores. These resins are usually in the form of beads or granules and swell when immersed in a solution.34