Protonation and Complexation of Isosaccharinic Acid with U(VI) and Fe(III) in Acidic Solutions: Potentiometric and Calorimetric Studies

December 1, 2004

Journal Article

Protonation and Complexation of Isosaccharinic Acid with U(VI) and Fe(III) in Acidic Solutions: Potentiometric and Calorimetric Studies

Abstract

SUMMARY-Protonation and complexation of...From the protentiometric titrations, the protonation constant of the carboxylate group is calculated to be...From the calorimetric titrations, the enthalpy of protonation of the carboxylate group is determined to be...The enthalpies of complexation between U(VI) and isosaccharinate are quite small...The complexation between U(VI) and isosaccharinate is mainly entropy-driven. In comparison, the enthalpies of complexation for...are large and exothermic, contributing significantly to the stability of the complexes.

Revised: April 14, 2005 | Published: December 1, 2004

Citation

Rao L., A.Y. Garnov, D. Rai, Y. Xia, and R.C. Moore. 2004. Protonation and Complexation of Isosaccharinic Acid with U(VI) and Fe(III) in Acidic Solutions: Potentiometric and Calorimetric Studies. Radiochimica Acta 92, no. 9-11:575-581. PNNL-SA-44876.