Solvent extraction of uranium(VI) and thorium(IV) from nitrate media by Cyanex 923
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S.K. Sahu
The extraction behaviour of uranium(VI) and thorium(IV) from nitrate solutions has been investigated using Cyanex 923 (TRPO) in xylene as an extractant. The extraction data have been analyzed by both graphical and theoretical methods by taking into account complexation of the metal ion in the aqueous phase with inorganic ligands and all plausible complexes extracted into the organic phase. The results demonstrate that these metal ions are extracted into xylene as Th(NO3)4 · 2 TRPO and UO2(NO3)2 · 2 TRPO. The equilibrium constants of the extracted complexes have been deduced by non-linear regression analysis. Infrared spectral data of the extracted complexes have been used to further clarify the nature of the complexes. The selectivities between these metal ions were evaluated and compared with commercially important extractants like tri-n-butylphosphate (TBP).
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Artikel in diesem Heft
- Isomeric yield ratios of 134I and 136I in the proton-, 12C- and 19F-induced fission of 235U, 237Np and 238U
- The formation of mixed-hydroxo complexes of Cm(III) and Am(III) with humic acid in the neutral pH range
- Complexation studies of UO22+ with humic acid at low metal ion concentrations by indirect speciation methods
- Determination of fictive binary data for plutonium(IV) nitrate
- Solvent extraction of uranium(VI) and thorium(IV) from nitrate media by Cyanex 923
- Binding and release of metallic cations by a polyaniline-based resin
- Natural radionuclides and plutonium isotopes in soil and shore sediments on Alexandria Mediterranean sea coast of Egypt
- Activities and activity ratios of U and Ra radioisotopes in drinking wells, springs and tap water samples in Morocco
