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Actinides
Items for "Actinides"
N, N′-dimethyl-N, N′-dibutyl tetradecyl malonamide impregnated magnetic particles for the extraction and separation of radionuclides from nuclear waste streams
N, N′-dimethyl-N, N′-dibutyl tetradecyl malonamide (DMDBTDMA) coated magnetic particles are being evaluated for the possible application in the partitioning of actinides, lanthanides and fission products from pure nitric acid solutions as well as from Simulated Pressurized Heavy Water Reactor-High Level Waste (PHWR-SHLW)...
Keywords: Magnetic carrier separation, DMDBTDMA, Actinides, Lanthanides, Fission
05/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagExtraction of actinides using N, N, N′, N′-tetraoctyl diglycolamide (TODGA): a thermodynamic study
The effect of temperature on the extraction behaviour of Am(III), Pu(IV) and U(VI) from nitric acid medium was studied employing N,N,N′,N′-tetraoctyl diglycolamide (TODGA) in n-dodecane...
Keywords: TODGA, Actinides, Thermodynamics, Extraction constant
06/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagSorption of Cs, Ni, Pb, Eu(III), Am(III), Cm, Ac(III), Tc(IV), Th, Zr, and U(IV) on MX 80 bentonite: An experimental approach to assess model uncertainty
A multi-site surface complexation/ion exchange model for dispersed MX 80 bentonite has been calibrated, considering the dissolution properties of the constituting mineral assemblage, for sorption of a large number of radionuclides, using experimental data from the present study together with well constrained literature data...
Keywords: Bentonite, Sorption, Actinides, Fission products, modeling
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagAdsorption of U(VI) from dilute aqueous solutions onto peat moss
The adsorption of U(VI) onto peat moss has been studied as a function of uranium concentration, pH, shaking time and ionic strength...
Keywords: Peat moss, Uranium(VI), Actinides, Adsorption, Adsorbents
01/2007 | 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 WissenschaftsverlagN,N,N′,N′-tetraoctyl-3-oxapentane-1,5-diamide impregnated magnetic particles for the uptake of lanthanides and actinides from nuclear waste streams
A novel, simple technique based on magnetically assisted chemical separation (MACS) has been developed for the uptake of lanthanides and actinides from pure nitric acid solutions as well as from Simulated Pressurized Heavy Water Reactor-High Level Waste (PHWR-SHLW)...
Keywords: Magnetic microparticles, TODGA, Lanthanides, Actinides, Uptake profiles
03/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagRecovery of actinides and lanthanides from high-level liquid waste by extraction chromatography using TODGA+TBP impregnated resins
A 30% (w/w) N,N,N′,N′-tetraoctyldiglycol amide (TODGA) and 10% (w/w) tributyl-phosphate (TBP)-containing resin was prepared and the batch uptake of several actinides [U(VI), Th(IV), Am(III), Cm(III), Cf(III)] and selected fission products from nitric acid solutions was investigated...
Keywords: TODGA, Actinides, Extraction chromatography, Separation, High-level liquid waste
07/2007 | 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 WissenschaftsverlagTRLFS and EXAFS investigations of lanthanide and actinide complexation by triflate and perchlorate in an ionic liquid
The solvation of the Eu-perchlorate (ClO4–) and triflate (CF3SO3–, OTf–) salts as well as of Cm(ClO4)3 and Am(ClO4)3 in the ionic liquid C4mimTf2N (1-butyl-3-methylimidazolium-bis(trifluoromethylsulfonyl)imide) has been comparatively investigated by application of laser fluorescence spectroscopy and X-ray absorption spectroscopy...
Keywords: Ionic Liquids, Lanthanides, Actinides, Eu(III), Cm(III)
01/2008 | Radiochimica Acta, Oldenbourg WissenschaftsverlagAbout low oxidation states, hydration and covalence properties of f elements
The existence of low oxidation states of lanthanides and actinides in aqueous solution has been re-examined in the light of recent data...
Keywords: Lanthanides, Actinides, Redox properties, hydration, Covalence
03/2008 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag