Abstract
Research in selective ion separations at Brigham Young University hasinvolved the use of liquid membranes of the bulk, emulsion, thin sheetsupported, hollow fiber supported, and two-module hollow fiber supportedtypes as well as solid phase extraction using immobilized ligands. By use ofdesigned cation and anion selective macrocyclic ligands, it has beenpossible to accomplish a wide range of interesting separations. Theprinciples underlying the separations and a comparison of the advantages anddisadvantages of the various systems are given. Some of the solid phaseextraction systems have been commercialized by IBC Advanced Technologies,Inc. Examples of commercial applications are presented in the analytical,environmental, metallurgical, precious metals, and nuclear waste areas.
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