Abstract
The removal of zinc ions (Zn2+) from Watts type bath by a weak basic resin (Sumichelate CR-2) was studied by using batchwise and column methods. The zinc ions adsorbed on the resin are desorbed by sulfuric acid solution (2N). Zinc ions are adsorbed on the resin in the nickel chloride solution, but not in the nickel sulfate or the boric acid solution. The adsorption is influenced by the concentration of nickel chloride or sulfuric acid in the bath. The amount of Zn2+ ions adsorbed on the resin from the bath is represented by Freundlich's adsorption isotherm.
