Application of triethylenetetraamine and 1,2- and 1,3-diaminopropane in the separation of metal ions on Chelex 100 ion exchanger

Abstract

Distribution coefficients have been determined for the metal ions calcium-(II), nickel(II), cobalt(II), copper(II), lead(II), zinc(II), manganese(II), cadmium(II), iron(III), aluminium(III), chromium(III), platinum(IV), rhodium(III) and iridium(III) in the systems metal-Chelex 100, metal-Chelex 100-triethylenetetraamine and metal-Chelex 100-1,2-diaminopropane (or 1,3-diaminopropane). The following mixtures of metal ions have been separated: chromium and nickel, using triethylenetetraamine and 1,2-diaminopropane; cobalt, nickel and manganese, using triethylenetetraamine; and aluminium, copper and manganese, using triethylenetetraamine and 1,2-diaminopropane. In addition, calcium and magnesium have been separated from mixtures with: copper and zinc; copper, zinc and lead; copper, nickel and lead; and copper, nickel and iron. The separation conditions decided upon were used for the determination of trace amounts of metals in calcium and magnesium salts and in dried post-flotation fertilisers.