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KMID : 1059519940380020129
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Journal of the Korean Chemical Society
1994 Volume.38 No. 2 p.129 ~ p.135
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Transport of Metal Ions Across Bulk Liquid Membrane by Lipophilic Acyclic Polyether Dicarboxylic Acids
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Cho Moon-Hwan
Cho Seong-Ho
Lee Ihn-Chong
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Abstract
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Acyclic polyether dicarboxylic acid have been studied as metal cation carriers in a bulk liquid membrane system. The proton-ionizable ligands feature allows the coupling of a cation transport to reverse proton transport. This feature offers promise for the effective separation and concentration of metal cations with the metal cation transport being driven by a pH gradient. Metal cation transport increased regularly with increasing hydroxide(OH-) concentration of source phase and with proton(H+) concentration of receiving phase. Competitive transport by the acyclic polyether dicarboxylic acids is selective for calcium ion over other alkaline-earth cations.
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