Thermodynamics of Synergistic Extraction of Americium(III) with HTTA using DHD£CMP(Bi-functional) and TBP(Mono-functional)

Abstract

Synergism / Am(ni) / HTTA / DHDECMP / TBP / ThermodynamicsSuininary Synergistic extraction of Ani(in) was studied with HTTA in combination with bifunctional (DHDECMP) and mono-functional (TBP) neutral donors in benzene medium at various fixed temperatures. The equilibrium constant (log K^) for the organic phase synergistic reaction with DHDECMP was found to be higher by about two Orders of magnitude as compared to that with TBP, in spite of their comparable basicities. This indicated the bi-functional behaviour of DHDECMP in contrast to the previous studies reported for Pu(VI) where DHDECMP was observed to behave as a mono-fiinctional donor. Thermodynamic Parameter viz. high + ve AS with DHDECMP compared to that with TBP supported this conclusion. However, the Ai/ values were comparable in the two cases and this was attributed to the expenditure of more energy for the release of larger number of water molecules by DHDECMP in comparison to that by TBP.

Enhanced Extraction of Amino Compounds Using Dicyclohexyl-18-crown-6 as a Ligand in an Aqueous Two-phase System

“…18-crown-6 and 15-crown-5 [12][13][14]. For instance, the stoichiometry of the complex between PuO 2 2+ and…”