Boron can be removed from RO permeate or from brackish ground water in a regenerable ion exchange system. The borate anion makes a very stable complex with Amberlite™ PWA10 resin. For the complex creation to take place, the resin must initially be in an alkaline form.

Regeneration consists of two steps. First de-complexing the borate anion, displacing boric acid with a stronger acid, typically sulfuric or hydrochloric acid. Next, the resin must be neutralized again with a small quantity of caustic soda.

For more detailed information on boron removal, please click here.