"a process in which ions are exchanged between a solution and an insoluble (usually resinous) solid; widely used in industrial processing"@en-us . . . . . "113502714"^^ . "ion exchange"@en-us . "13502714-n"^^ . "0"^^ . . . "ion exchange"^^ . . . "112739008"@en-us . . "0"^^ . .