Selective Liquid Membrane Transport of Lead(Ⅱ) by an Acyclic Polyether Dicarboxylic Acid Ionophore

摘要

The effects of the chain structure and substitutents in six acyclic polyether dicarboxylic acids and one acyclic poly- ether carboxylic acid upon the efficiency and selectivity of pH-driven Pb~2+ transport in a bulk chloroform mem- brane system have been assessed. Among the carriers, 1, 2-bis[2-(o-carboxyphenoxy) ethoxy]-4-tert-butylben- zene(1) is found to exhibit high selectivity for transport of Pb~2+ compared with alkali metal cations and a variety of other divalent metal ion species.