Abstract:
High recovery of cadmium metal from household spent nickel cadmium batteries
through hydrometallurgical process on small scale was conducted. Recovery of metal through
separation of leached metal ions using ion exchange resin was examined. Hydrochloric acid (4.0 M)
solution showed relatively better leaching potential than other acids, however, considering overall
efficiency of the process, sulphruic acid was suggested to be employed as leaching and regeneration
reagent in this study. Variations in solid/liquid ratio did not show a significant difference in the
amount of heavy metal ions leached out; however, leaching temperature greatly affected the leaching
efficiency. Changes in bed volume of the resin greatly influenced the sorption of cadmium metal
ions while concentration and flow rate of the regeneration reagent were found important parameters
affecting regeneration capacity of the resin.
