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Dual Use of Micellar-Enhanced Ultrafiltration and Time-Resolved Laser-Induced Spectrofluorimetry for the Study of Uranyl Exchange at the Surface of Alkylsulfate Micelles by Pascal Reiller; Daniel Lemordant; Christophe Moulin; Catherine Beaucaire is a Chemistry article available to read on EtoBox.

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Micellar-enhanced ultrafiltration (MEUF) and time-resolved laser-induced spectrofluorometry (TRLIS) have been used to study the interaction between the uranyl ion \(\left(\mathrm{UO}_{2}^{2+}\right)\) and sodium alkylsulfate micelles. The studies were performed at a constant \(\mathrm{pH}\) and various uranium concentrations. It has been found that the uranyl ion is rejected by an ultrafiltration membrane due to the ion's strong interaction with the micellar surface. The association constant of \(\mathrm{UO}_{2}^{2+}\) to dodecyl and tetradecyl sulfate micelles was investigated. Assuming that adsorption in the Stern layer is described by a Langmuir isotherm, ion exchange constants were found to be significantly higher than those obtained for other divalent ions belonging to the \(d\)-block \(\left(\mathrm{Cu}^{2+}, \mathrm{Co}^{2+}\right)\). The influence of the surfactant chain length upon ion exchange constants of uranium has also been stressed. A limiting rejection rate has been presented and an expression has been proposed. (i) 1994 Academic Press, Inc.

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Author

Pascal Reiller; Daniel Lemordant; Christophe Moulin; Catherine Beaucaire

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)

Published

1994

Language

EN

Field

Chemistry (Physical Sciences)