anion exchange resin

An anion exchange resin is a special material used to remove negatively charged ions (anions) from liquids. It works like a filter that captures unwanted anions—such as nitrates, chlorides, or sulfates—while allowing other components to pass through. The resin contains positively charged sites that attract and hold onto the negatively charged ions, effectively exchanging them with other ions initially present on the resin. This process is commonly used in water purification, softening, and chemical production to improve water quality by selectively removing specific anions.