Removal of Zn2+ from the ternary system Zn2+ -Na+ -H+ by cation-exchange resin column

Very dilute solutions containing zinc sulphate, sodium and sulphuric acid were passed down a column of Zeo-Karb 225 cation-exchange resin, and the volume at which zinc first appeared in the effluent (breakthrough volume), together with the volume at which the concentration of zinc in the effluent became equal to its concentration in the influent (equivalent volume), were determined.