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Selective Transport Of Copper Through Bulk Liquid Membrane Using Neocuproine As A Carrier

S.H.Ahmadi, A.M.Haji Shabani, S.Dadfarnia, A.Dehghani

Neocuproine was found to be an excellent carrier for uphill transport of copper ions across a chloroform liquid membrane. The initial aqueous phase consisted of hydroxylammonium chloride as a reducing agent and sodium perchlorate as counter ion. The aqueous receiving phase was 1 mol L-1 nitric acid solution. It was found that the system is highly efficient and selective for uphill transport of copper. The amount of copper transported through the liquid membrane after 60 min was 98.2 ± 2.5%. The system has high selectivity for copper transport from aqueous solutions containing other ions, such as Mg2+, Fe2+, Co2+, Cd2+, Ca2+, Pb2+, Hg2+, Cr3+ and Mn2+. The procedure has been applied to the determination of copper in standard stainless steel alloys.