Journal ArticleDOI
THE TRUEX PROCESS - A PROCESS FOR THE EXTRACTION OF THE TKANSURANIC ELEMENTS EROM NITRIC AC In WASTES UTILIZING MODIFIED PUREX SOLVENT*
TLDR
A generic transurantc (TRU) element extraction/recovery process was developed based on the use of octyl(phenyl)-N,N-diiso-butylcarbamoylmetliylphosphine oxide, 0φD(iB)CMPO, dissolved in PUREX process solvent (tribntyl phosphate, TBP, in normal paraffluic hydrocarbon, NPH) as mentioned in this paper.Abstract:
A generic transurantc (TRU) element extraction/recovery process was developed based on the use of octyl(phenyl)-N,N-diiso-butylcarbamoylmetliylphosphine oxide, 0φD(iB)CMPO, dissolved in PUREX process solvent (tribntyl phosphate, TBP, in normal paraffluic hydrocarbon, NPH). The process (called TRUEX) is capable of reducing the TRU concentration by many orders of magnitude In waste solutions containing a wide range of nitric acid, salt, and fission product concentrations. A major feature of the process is that it is readily adaptable for waste processing in existing fuel reprocessing facilities.read more
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Journal ArticleDOI
Sequential separation of light rare-earth elements, thorium and uranium by miniaturized extraction chromatography: Application to isotopic analyses of silicate rocks
TL;DR: In this article, a new method for the concomitant separation of the light rare-earth elements (LREEs), thorium and uranium is described, and applied to the determination of 143 Nd 144 Nd ratios, and concentrations of Sm, Nd, Th and U in silicate rocks, using isotope dilution and thermal ionization mass spectrometry.
Journal ArticleDOI
A novel strontium-selective extraction chromatographic resin*
TL;DR: In this paper, the effect of nitric acid concentration on the selectivity of a novel extraction chromatographic resin consisting of an octanol solution of 4,4′(5′)-bis(t-butyl-cyclohexano)-18-crown-6 sorbed on an inert polymeric support for strontium over a number of alkali, alkaline earth, and other metal cations was evaluated.
Journal ArticleDOI
Separation and preconcentration of uranium from acidic media by extraction chromatography
E. Philip Horwitz,Mark L. Dietz,Renato Chiarizia,Herbert Diamond,Alice M. Essling,Donald G. Graczyk +5 more
TL;DR: In this paper, the effect of macro levels of selected elements on the sorption of actinide ions by a novel extraction chromatographic resin comprised of a solution of octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide in tri-n-butyl phosphate supported on an inert polymeric substrate is described.
Journal ArticleDOI
Concomitant separation of strontium and samarium-neodymium for isotopic analysis in silicate samples, based on specific extraction chromatography
TL;DR: In this paper, a separation scheme for strontium and light rare earth elements and its application to the isotopic analysis of strons and neodymium in silicate rocks are presented.
Journal ArticleDOI
Actinide partitioning—a review
TL;DR: In this paper, a review of the state-of-the-art reagents and methods for hydrometallurgical partitioning of actinides from different types of transuranium wastes and dissolved fuels is presented.
References
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Recent Developments in Separation Science: Volume 2
Abstract: Essential Tremor The History of Essential Tremor Epidemiology and Etiology of Essential Tremor Pathophysiology of Essential Tremor Animal Models of Essential Tremor Neuropathology and Neurochemistry of Essential Tremor Differential Diagnosis and Clinical Characteristics of Essential Tremor Clinical Assessments of Essential Tremor Impact of Essential Tremor and Its Medical and Surgical Treatment on Neuropsychological Functioning, and Quality of Life Neuroimaging of Essential Tremor Medical Treatment of Essential Tremor Surgical Treatment of Essential Tremor Occupational Therapy, Physical Therapy, and Alternative Therapies for Essential Tremor Parkinsonian Tremor Dystonic Tremor Cerebellar Tremor Holmes Tremor Orthostatic Tremor Task-Specific Tremor Neuropathic Tremor Posttraumatic Tremor Infectious Tremor Intracranial Lesions and Tremor Drug- and Toxin-Induced Tremor Physiological Tremor Psychogenic Tremor
Journal ArticleDOI
Selected Alkyl(phenyl)-N,N-dialkylcarbamoylmethylphosphine Oxides as Extractants for Am(III) from Nitric Acid Media
TL;DR: In this paper, neutral bifunctional extractants, alkyl(phenyl)-N,N-dialkyl carbamoylmethylphosphine oxides, have been prepared and studied as extractants for Am(III) from nitric acid media.
Journal ArticleDOI
THE EXTRACTION OF Am(III) FROM NITRIC ACID BY OCTYL(PHENYL)-N,N-DIISOBUTYLCARBAMOYLMETHYLPHOSPHINE OXIDE - TRI-n-BUTYL PHOSPHATE MIXTURES
E. Philip Horwitz,D. G. Kalina +1 more
TL;DR: In this article, TBP was used as a phase modifier to improve the performance of Am(III) from nitric acid using OOD[IB]CMPO and tributylphosphate.
Journal ArticleDOI
The Extraction of Th(IV) and U(VI) by Dihexyl-N, N-diethylcarbamoylmethylphosphonate from Aqueous Nitrate Media
TL;DR: In this article, the extraction behavior of Th(IV) and U(VI) from nitrate media was studied using relatively pure dihexyl-N, N-diethyl carbamoylmethylphosphonate (DHDECMP) and DB[BP] using Kd data.
Transuranic Decontamination of Nitric Acid Solutions by the Truex Solvent Extraction Process: Preliminary Development Studies
TL;DR: The work that has been performed at Argonne National Laboratory on the development of the TRUEX process, a solvent extraction process employing a bifunctional organophosphorous reagent in a PUREX process solverc (tributyl phosphate-normal paraffinic hydrocarbons), is summarized in this article.