KINETICS AND MECHANISM OF Y(III) EXTRACTION WITH CA-100 USING A CONSTANT INTERFACIAL CELL WITH LAMINAR FLOW

Abstract

ABSTRACT The Yttrium(III) extraction kinetics and mechanism with sec-nonylphonoxy acetic acid (CA-100) were investigated by a constant interfacial cell with laminar flow. The studies of interfacial tension and solubility of extractant and effects of the stirring rate, temperature, specific interfacial area and species concentration on the extraction rate showed that the extraction regime was dependent on the extraction conditions and the most probable reaction zone was at the liquid–liquid interface. The rate equation of extracting yttrium by CA-100 in heptane was Rf = k[Y3+](a) [H2A2](o) 0.88 [H+](a)−1.08.