Metal recovery from solution is typically achieved by techniques
including chemical precipitation [3,4], solvent extraction
[5,6] and adsorption [7–13]. Adsorption is conducted using
adsorbents including activated carbon [7] and ion-exchange
resins [8,9]. Although activated carbons are useful in removing
organic solutes from solution, they are often not as effective in
recovering metals from solutions in comparison to ion-exchange
resins. Various types of ion-exchange resins are commercially
available and are differentiated by their surface functional groups
and nature of adsorption. These include cationic, anionic and
chelating resins