The performance of a series of inorganic cation-exchange materials in metathesis reactions, heavy metal removal for waste water treatment, and enrichment of metal ions in a brine has been studies. The material shows different selectivity for ion-exchange with various metal cations, which enables heavy metal removal, ion separation for water treatment and enrichment for metal recovery in aqueous systems. In addition, the material is ideal for production of all kinds of desired salts in aqueous solutions via metathesis reactions (also known as double replacement reactions) which are normally reversible.
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