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Studies on the dissolution behaviour of ThO2 and (U,Th)O2 by a solid state reaction method
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Satyajeet Chaudhury
Published/Copyright:
September 25, 2009
Summary
A simple and fast method for the dissolution of sintered ThO2 and (U,Th)O2 was developed. The products formed when these oxides were fused with ammonium sulphate at various temperatures were found to be readily soluble in dilute nitric acid. Among all the products obtained at various temperatures, (NH4)2 Th (SO4)3 and (NH4)2(Ux,Th1-x)(SO4)3, obtained at 365 °C, were found highly soluble (>99%). After dissolution thorium was separated selectively by oxalate precipitation method. More than 95% of uranium was recovered from the solution by ammonium diuranate precipitation method. The products formed at different temperatures were characterised by X-ray, thermal and chemical analysis techniques.
Received: 2005-9-5
Accepted: 2006-2-1
Published Online: 2009-9-25
Published in Print: 2006-6-1
© by Oldenbourg Wissenschaftsverlag, München
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Articles in the same Issue
- Preface - Special Issue: NUCAR 2005
- Incomplete fusion mechanism in 16O + 93Nb reaction at 6 MeV/nucleon: Recoil range measurements
- Extraction of actinides using N, N, N′, N′-tetraoctyl diglycolamide (TODGA): a thermodynamic study
- Extraction of neptunium(IV) by a mixture of 3-phenyl-4-acetyl-5-isoxazolone and tri-n-octyl phosphine oxide
- Third phase formation in the extraction of Th(NO3)4 by tri-2-methyl butyl phosphate from nitric acid media
- Solvent extraction behaviour of some fission product elements with N,N-dihexyl octanamide and tri-n-butyl phosphate under simulated PUREX process conditions
- Transport of uranium from nitric acid solution by non-dispersive solvent extraction using a hollow fibre contactor
- Fixation of some major fission products in NaZr2P3O12 ceramic employing microwave heating
- Synthesis, characterization and structural refinement of polycrystalline uranium substituted zirconolite CaZr0.9U0.1Ti2O7
- Effect of glass composition on diffusion of cesium in borosilicate glass
- Studies on diffusional mobility and selectivity of I− ion in plasticized anion-exchange membrane using radiotracer
- BEHSA grafted polymer for selective extraction of U(VI), Th(IV) and La(III) from acidic matrices and environmental samples – a green process
- Studies on the dissolution behaviour of ThO2 and (U,Th)O2 by a solid state reaction method
- Studies on some divalent metal α-isosaccharinic acid complexes
- Effect of humic acid on cesium sorption on silica colloids
- Preparation and preliminary biological evaluation of a 177Lu labeled nitroimidazole derivative for possible use in targeted tumor therapy
