In the context of water purification, ion-exchange is a rapid and reversible process in which impurity ions present in the water are replaced by ions released by an ion-exchange resin. The impurity ions are taken up by the resin, which must be periodically regenerated to restore it to the original ionic form. (An ion is an atom or group of atoms with an electric charge. Positively-charged ions are called cations and are usually metals; negatively-charged ions are called anions and are usually non-metals).
For many years, the process for how to make deionized water was complicated and expensive. With the introduction of modern deionization resins, mixed bed resin media, and removable DI resin cartridges, however, it's become much more affordable for businesses to make high purity water on site.
Get in touch with Lanlang to get the water deionizer resin more information.