anion exchange

Anion exchange is a process used to remove or recover specific negatively charged ions (anions) from a solution. It involves passing the solution through a special resin or material that contains positively charged sites. These sites attract and hold onto unwanted anions like chloride or sulfate, replacing them with other anions that are either harmless or desired. This process is commonly used in water purification, softening hard water, or in chemical manufacturing to selectively isolate certain ions, making the solution cleaner or better suited for specific applications.