The Studies on Heavy Metal Ions Recovery From Chloride, Sulphate and Ammonia Solutions on the Selective Ion Exchangers of Various Types

摘要

The possibilities of selective ion exchangers application for the recovery of copper (II), cobalt (II) and zinc (II) ions from chloride, sulphate and ammonia media were studied. The optimal conditions for removal of these metal ions with respect to equilibrium pH, phase contact time, HCl concentration and the type of ion exchanger used were determined. As the ion exchangers there were polyamine (Diaion CR-20), thiol (Duolite GT-73) and aminophosphonic (Duolite C-467) resins. The percentage of copper, cobalt, zinc and nickel in the resin phase was estimated by means of atomic absorption spectrometry.