Extraction and stripping behaviour of tri-iso-amyl phosphate and tri-n-butyl phosphate in n-dodecane with U(VI) in nitric acid media
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K. Benadict Rakesh
und
P. R. Vasudeva Rao
Abstract
Batch extraction of U(VI) by 1.1 M solution of tri-iso-amyl phosphate (TiAP) in n-dodecane (n-DD) from uranyl nitrate solutions in nitric acid media has been investigated as a function of metal loading and equilibrium aqueous phase acidity at 303 K. A method adopted for free acidity determination by using a mixture of potassium oxalate and sodium fluoride for complexing U(VI) has been validated by comparing the data generated in the present study with literature data available for tri-n-butyl phosphate (TBP) under identical conditions. Extraction and stripping behaviour of 1.1 M TiAP/n-DD-U(VI)/HNO3 and 1.1 M TBP/n-DD-U(VI)/HNO3 systems have been compared by carrying out extraction, scrubbing and a series of stripping in cross-current mode. Stripping behaviour of both the solvents loaded with U(VI) and HNO3 has also been investigated as a function of time to understand the effects of nitric acid induced degradation on stripping.
©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
