Journal ArticleDOI
An improved extraction chromatographic resin for the separation of uranium from acidic nitrate media.
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TLDR
The ability of the new resin to strongly and selectively retain U(VI) from such a wide range of acid concentrations, along with its favorable physical properties, make it a good candidate for application in the separation and preconcentration of U( VI) from complex environmental, biological, and nuclear waste samples for subsequent determination.About:
This article is published in Talanta.The article was published on 2001-07-06. It has received 76 citations till now. The article focuses on the topics: Uranyl nitrate & Uranyl.read more
Citations
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Journal ArticleDOI
Preconcentration techniques for uranium(VI) and thorium(IV) prior to analytical determination-an overview.
TL;DR: Various off-line and on-line procedures developed for uranium(VI) and thorium(IV) prior to their analytical determination since 1990 were critically reviewed in terms of enrichment factor, retention/sorption capacity, validation using certified reference materials and application to complex real samples.
Journal ArticleDOI
Anion concentration-dependent partitioning mechanism in the extraction of uranium into room-temperature ionic liquids
TL;DR: The mode of partitioning of uranyl ion between nitrate-containing aqueous phases and various N,N'-dialkylimidazolium-based room-temperature ionic liquids (RTILs) in the presence of tri-n-butyl phosphate is shown to change from an ion-exchange process to one involving extraction of a neutral uranyl-TBP-nitrato complex as the aqueously nitrate concentration is increased.
Journal ArticleDOI
Selective adsorption of uranium(VI) from aqueous solutions using the ion-imprinted magnetic chitosan resins.
TL;DR: The results showed that the adsorption of U(VI) on the magnetic chitosan resins was affected by the initial pH value, the initial U( VI) concentration, as well as the temperature, and both kinetics and thermodynamic parameters of the Adsorption process were estimated.
Journal ArticleDOI
Removal of uranium(VI) from aqueous solutions using glycidyl methacrylate chelating resins
TL;DR: In this article, the effect of embedded magnetite particles on the uptake capacity and rate of adsorption was clarified, and the maximum uptake capacities obtained at 25°C were 0.82 and 1.68 mmol/g for RIa and RIa-mag, respectively.
Journal ArticleDOI
Kinetics, isotherm and thermodynamics for uranium and thorium ions adsorption from aqueous solutions by crystalline tin oxide nanoparticles
TL;DR: In this paper, the synthesis of nano tin oxide as an adsorbent via homogeneous precipitation using urea as a reagent to control the pH and to obtain a pure and dense hydrous tin oxide precipitate.
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.
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
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
Separation and preconcentration of strontium from biological, environmental, and nuclear waste samples by extraction chromatography using a crown ether.
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.
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