ion exchange

noun

1. the process of reciprocal transfer of ions between a solution and a resin or other suitable solid.

ion exchange

noun

1. the process in which ions are exchanged between a solution and an insoluble solid, usually a resin. It is used to soften water, to separate radioactive isotopes, and to purify certain industrial chemicals

ion exchange

1. A reversible chemical reaction between two substances (usually a relatively insoluble solid and a solution) during which ions of equal charge may be interchanged. Ion exchange is used in water softening and purification, chemical analysis, the separation of radioactive isotopes, and kidney dialysis.
2. ◆ Cation exchange is the exchange of positively charged ions.
3. ◆ Anion exchange is the exchange of negatively charged ions.

Word History and Origins

Origin of ion exchange¹

First recorded in 1920–25

Example Sentences

He reached hastily for water and found the tall plastic column of the ion-exchange apparatus empty.

From Project Gutenberg