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Plutonium
Items for "Plutonium"
Distribution studies on Th(IV), U(VI) and Pu(IV) using tri-n-butylphosphate and N,N-dialkyl amides
Distribution studies on U, Pu and Th have been carried out employing tri-n-butyl phosphate (TBP) as extractant to optimise the conditions for the reprocessing of spent fuel of proposed Th based Advanced Heavy Water Reactor (AHWR)...
Keywords: Uranium, Thorium, Plutonium, Amide, TBP
04/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagEvaluation of cerium(IV) catalyzed remediation of plutonium contaminated soils at the Idaho Cleanup Project
An engineering and analytical chemical program was used to evaluate a proposed process to remove plutonium from contaminated soils at the Department of Energy´s Idaho National Engineering and Environmental Laboratory Site...
Keywords: Soil decontamination, Pit 9, Plutonium, Plutonium oxide, Idaho
03/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagOn the stability of Pu(III) at different pH under non-inert conditions
A glove-box in contact with the lab atmosphere has been used in a test to see whether trivalent plutonium can be kept in this oxidation state at different pH...
Keywords: Plutonium, Trivalent, Oxidation state, Extraction, Sorption
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagReduction of plutonium(VI) in brine under subsurface conditions
The redox stability of PuO22+ was investigated in brine under subsurface conditions...
Keywords: Plutonium, WIPP, XANES, Iron reduction, Brine chemistry
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagBiotransformation of plutonium complexed with citric acid
The presence of organic ligands in radioactive wastes is a major concern because of their potential for increasing the transport of radionuclides from disposal sites...
Keywords: Plutonium, Citric acid, Speciation, Biodegradation, Ionic strength
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagIon exchange studies for the removal of plutonium and americium from organic liquid scintillator waste solution
Removal of radioactive nuclides from effluents is important for the safe disposal of the radioactive waste...
Keywords: Plutonium, Americium, Removal, Ethanol, Liquid scintillator
12/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagThe interaction of Desulfovibrio äspöensis DSM 10631T with plutonium
Microbes are widely distributed in nature and they can strongly influence the migration of actinides in the environment...
Keywords: Plutonium, Bacteria, Desulfovibrio äspöensis, Biosorption, Bioreduction
12/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagHydrolysis of plutonium(IV) in acidic solutions: no effect of hydrolysis on absorption-spectra of mononuclear hydroxide complexes
Tetravalent plutonium readily undergoes hydrolysis even in highly acidic aqueous solutions. In the past, many attempts were made to quantify hydrolysis species by means of optical absorption spectroscopy...
Keywords: Plutonium, Tetravalent, Hydrolysis, Redox reaction, Disproportionation
01/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagDiffusive transport of neptunium and plutonium through compacted sand-bentonite mixtures under anaerobic conditions
Diffusive transport of neptunium, plutonium, tritiated water (HTO), Cs+ and I- in compacted sand-bentonite mixtures was studied by a through-diffusion method...
Keywords: diffusion, Neptunium, Plutonium, Bentonite, Effective diffusivity
02/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagRapid sequential determination of americium and plutonium in sediment and soil samples by ICP-SFMS and alpha-spectrometry
An improved sample preparation method for the determination of americium and plutonium in sediment and soil samples by inductively coupled plasma sector field mass spectrometry (ICP-SFMS) and alpha-spectrometry is described...
Keywords: Actinides, ICP-SFMS, Alpha-spectrometry, Americium, Plutonium
02/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagSolubility and redox reactions of Pu(IV) hydrous oxide: Evidence for the formation of PuO2+x(s,hyd)
The solubility and redox reactions of Pu(IV) hydrous oxide were analyzed by comparing total Pu concentrations, oxidation state distributions and simultaneously measured redox potentials under air and under Ar containing only traces of oxygen...
Keywords: Plutonium, Solubility, Redox reactions, PuO2+x(s, hyd), Pu(V)
04/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagCation–cation interaction in crystal structures of Np(V) and Pu(V) benzoate complexes with 2,2′-bipyridine, [NpO2(C10H8N2)(OOCC6H5)]2 and [PuO2(C10
Single crystals of the Np(V) and Pu(V) benzoate complexes with 2,2′-bipyridine were prepared. According to X-ray diffraction analysis data, they are isostructural neutral dimers with the [AnO2(C10H8N2)(OOCC6H5)]2 (An=Np or Pu) composition...
Keywords: Actinides, Neptunium, Plutonium, Benzoates, Bipyridine
09/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagRemoval of plutonium and americium from waste matrices by supercritical carbon dioxide extraction
The extraction of plutonium from tissue paper matrix was carried out using supercritical carbon dioxide (Sc-CO2)...
Keywords: Supercritical fluid extraction, Plutonium, Americium, CMPO, Tissue paper
10/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagSorption of tetravalent plutonium and humic substances onto kaolinite
The sorption of tetravalent plutonium onto kaolinite, a clay mineral, has been studied as a function of pH...
Keywords: Plutonium, Oxidation state, Kaolinite, Sorption, desorption
10/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagSeparation of actinides from fission products by extraction chromatography prior to X-ray fluorescence measurement for analytical control of a PUREX test
Five separation methods by Eichrom column extraction chromatography were developed and implemented for performance control of a PUREX (Plutonium, Uranium Refining by EXtraction) test...
Keywords: Extraction chromatography, UTEVA®, X-ray fluorescence, Uranium, Plutonium
11/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagSpeciation of An(IV) (Pu, Np, U and Th) in citrate media
The acquisition of additional data concerning actinide decorporation is planned under the French nuclear and environmental toxicology program.
Citric acid is a fundamental biological constituent found at relatively high concentrations in blood plasma and is involved in many biological processes.
Spectrophotometry was the primary method used to determine the speciation of An(IV)-citrate systems (Th, U, Np, Pu)...
Keywords: Plutonium, Neptunium, Uranium, Thorium, Citric acid
03/2008 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag