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
TLDR
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.About:
This article is published in Analytica Chimica Acta.The article was published on 1992-08-24. It has received 578 citations till now. The article focuses on the topics: Sorption & Nitric acid.read more
Citations
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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.
BookDOI
Handbook of Water Analysis
TL;DR: In this paper, the authors present a sampling and data treatment method for water analysis, which is based on the analysis of water samples collected by the National Institute of Water and Environmental Sciences.
Journal ArticleDOI
Separation and preconcentration of actinides by extraction chromatography using a supported liquid anion exchanger: Application to the characterization of high-level nuclear waste solutions
E. Philip Horwitz,Mark L. Dietz,Renato Chiarizia,Herbert Diamond,Sherrod L. Maxwell,Matthew R. Nelson +5 more
TL;DR: In this paper, a quaternary amine-based liquid anion exchanger was used for the extraction of actinides from nitric and hydrochloric acids, which exhibited preferential retention of tetravalent actinide over a wide range of acidities.
Journal ArticleDOI
Natural fractionation of 238U/235U
TL;DR: In this article, the authors report variations of the 238U/235U isotope ratio in natural samples (basalts, granites, seawater, corals, black shales, suboxic sediments, ferromanganese crusts/nodules and BIFs) of ∼1.3.
Journal ArticleDOI
Novel Extraction of Chromatographic Resins Based on Tetraalkyldiglycolamides: Characterization and Potential Applications
TL;DR: In this article, two new extraction chromatographic resins containing the diglycolamide class of molecules have been prepared and characterized, and potential applications identified, and the new resins consist of 40 weight percent N,N,N′N′ tetraoctyldiglycamide (TODGA) and N, n,N',N′ n′ tetrakis−2−ethylhexylhexylcylcoxyldigcylcolamide (TEHDGA) sorbed onto 50-100µm particle size Amberchrom® CG
References
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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.
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THE TRUEX PROCESS - A PROCESS FOR THE EXTRACTION OF THE TKANSURANIC ELEMENTS EROM NITRIC AC In WASTES UTILIZING MODIFIED PUREX SOLVENT*
TL;DR: 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.
Journal ArticleDOI
Separation and preconcentration of strontium from biological, environmental, and nuclear waste samples by extraction chromatography using a crown ether.
Journal ArticleDOI
EXTRACTION OF Am FROM NITRIC ACID BY CARBAMOYL-PHOSPHORYL EXTRACTANTS: THE INFLUENCE OF SUBSTITUENTS ON THE SELECTIVITY OF Am OVER Fe AND SELECTED FISSION PRODUCTS
TL;DR: A number of neutral extractants containing the P(0)(CH2)nC(0)N raolety were evaluated for their ability to extract Am from nitric acid and their selectivity for Am over Fe and selected fission products as discussed by the authors.
Journal ArticleDOI
Concentration and separation of actinides from urine using a supported bifunctional organophosphorus extractant
TL;DR: In this article, a method was developed to isolate quantitatively the actinide elements (as a group) from urine samples and to produce near massless electrodeposits suitable for high-resolution α-spectrometry.