A selective uphill transport of copper through bulk liquid membrane using Janus Green as an anion carrier

Abstract

A bulk liquid membrane consisted of 1.8 × 10-4 M Janus Green in chloroform that placed between an aqueous source phase containing 0.5 M sodium thiocyanate at pH 7 and an aqueous receiving phase with 0.1 5 M histidine at pH 7 results in an uphill transport of copper from the source phase to the receiving phase. The amount of copper transport through the liquid membrane after 180 min was 97.0 ± 1.7%. The presence of other metals such as Cd2+, Zn2+, Hg2+, Mg2+, Ag1+, Ni2+, Pb2+, Fe3+, K1+, Co2+ doesn't change the efficiency of copper transport. © 2002 Published by Elsevier Science B.V.