The ions to be removed from the water can be exchanged with ions present on the resin (e.g. softening by exchanging calcium for sodium ions), or can be removed entirely by the resin without any exchange (e.g. for the production of demineralised water). ... Ion exchangers can be divided into cation and anion exchangers.
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The ions to be removed from the water can be exchanged with ions present on the resin (e.g. softening by exchanging calcium for sodium ions), or can be removed entirely by the resin without any exchange (e.g. for the production of demineralised water). ... Ion exchangers can be divided into cation and anion exchangers.