New unsymmetrical digycolamide ligands for trivalent actinide separation
-
Jammu Ravi
,
M. P. Antony
Abstract
New unsymmetrical diglycolamides (UDGAs), N, N-di-butyl-N′, N′-di-dodecyl-3-oxapentane-1,5-diamide (C12-C4), N, N-di-dodecyl-N′, N′-di-hexyl-3-oxapentane-1,5-diamide (C12-C6), N, N-di-decyl-N′, N′-di-dodecyl-3-oxapentane-1,5-diamide (C12-C10) have been synthesized, and evaluated for the separation of americium(III) and europium(III) from nitric acid medium. The extraction behavior of Am(III), Eu(III), and Sr(II) in a solution of these UDGAs in n-dodecane was studied as a function of concentration of nitric acid in the aqueous phase. The distribution ratio of Am(III) and Eu(III) increased with increase in the concentration of nitric acid. The third phase formation behavior of nitric acid and neodymium(III) in 0.1 M UDGA/n-dodecane was studied. The third phase formation was not observed in all these UDGAs in n-dodecane (0.1 M), when the concentration of Nd(III) was ∼ 500 mM in 3–4 M nitric acid. The stoichiometry of Am(III)-UDGA was determined from the slope analysis of the extraction data, which indicated the formation of 1:3 complex in all cases. Our studies revealed that the UDGA ligands with dodecyl group attached to one amidic nitrogen atom is inevitable for preventing third phase formation and the alkyl group at the other amidic nitrogen can be varied from butyl to decyl group for obtaining efficient extraction of trivalent actinides from high-level nuclear waste.
©2014 Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Measurement of the 240Am production cross section via proton irradiation of 242Pu
- Ac, La, and Ce radioimpurities in 225Ac produced in 40–200 MeV proton irradiations of thorium
- Experimental cross section for the 152Sm(n, γ)153Sm reaction at 0.0334 eV
- Evaluation of an extraction chromatographic resin containing CMPO and ionic liquid for actinide ion uptake from acidic feeds: Part II. Batch actinide sorption, radiolytic degradation and column studies
- Single-cycle method for partitioning of trivalent actinides using completely incinerable reagents from nitric acid medium
- New unsymmetrical digycolamide ligands for trivalent actinide separation
- Extraction and stripping behaviour of tri-iso-amyl phosphate and tri-n-butyl phosphate in n-dodecane with U(VI) in nitric acid media
- Influence of humic acid on plutonium sorption to gibbsite: Determination of Pu-humic acid complexation constants and ternary sorption studies
- Sorption of cesium in young till soils
- Development of radiolanthanide labeled porphyrin complexes as possible therapeutic agents in beast carcinoma xenografts
Artikel in diesem Heft
- Frontmatter
- Measurement of the 240Am production cross section via proton irradiation of 242Pu
- Ac, La, and Ce radioimpurities in 225Ac produced in 40–200 MeV proton irradiations of thorium
- Experimental cross section for the 152Sm(n, γ)153Sm reaction at 0.0334 eV
- Evaluation of an extraction chromatographic resin containing CMPO and ionic liquid for actinide ion uptake from acidic feeds: Part II. Batch actinide sorption, radiolytic degradation and column studies
- Single-cycle method for partitioning of trivalent actinides using completely incinerable reagents from nitric acid medium
- New unsymmetrical digycolamide ligands for trivalent actinide separation
- Extraction and stripping behaviour of tri-iso-amyl phosphate and tri-n-butyl phosphate in n-dodecane with U(VI) in nitric acid media
- Influence of humic acid on plutonium sorption to gibbsite: Determination of Pu-humic acid complexation constants and ternary sorption studies
- Sorption of cesium in young till soils
- Development of radiolanthanide labeled porphyrin complexes as possible therapeutic agents in beast carcinoma xenografts
