Definition of ion-exchanging in English:
ion-exchanging
adjective ˈʌɪənɪksˌtʃeɪn(d)ʒɪŋˈʌɪənɛksˌtʃeɪn(d)ʒɪŋ
That brings about ion exchange; capable of ion exchange.
Origin
1930s; earliest use found in British Patents. From ion + exchange + -ing, after ion exchange.