Separation and Preconcentration of Cesium from Acidic Media by Extraction Chromatography

Dietz, Mark L.; Ensor, D.D.; Harmon, Ben; Seekamp, Stefan

doi:10.1080/01496390600744480

Cited by 20 publications

(9 citation statements)

References 43 publications

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“…In contrast to TIMS, ICP-MS is not a selective ion source, and this technique is therefore more demanding in terms of purity of the rubidium fraction to be analyzed, not only concerning Sr (which interferes at m / z 87) but also for other elements which might produce polyatomic isobaric interferences or contaminate the instrument. For these reasons, organic molecules developed for extracting radioactive Cs isotopes from acidic nuclear waste solutions − were investigated as they might offer a much better alternative to produce a clean fraction of Rb. In this work, the calixcrown BEHBCalixC6 was used to prepare an EXC material by impregnation of the same inert porous support as that employed in the commercially available resins.…”

Section: Discussionmentioning

confidence: 99%

Integrated Extraction Chromatographic Separation of the Lithophile Elements Involved in Long-Lived Radiogenic Isotope Systems (Rb–Sr, U–Th–Pb, Sm–Nd, La–Ce, and Lu–Hf) Useful in Geochemical and Environmental Sciences

Gannoun

2017

Anal. Chem.

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A fast and efficient sample preparation method in view of isotope ratio measurements is described, allowing the separation of 11 elements involved, either as "parent" or as "daughter" isotopes, in six radiogenic isotope systems used as chronometers and tracers in earth, planetary, and environmental sciences. The protocol is based on small extraction chromatographic columns, used either alone or in tandem, through which a single nitric acid solution is passed, without any intervening evaporation step. The columns use commercially available extraction resins (Sr resin, TRU resin, Ln resin, RE resin, and again Ln resin for isolating Sr and Pb, LREE then La-Ce-Nd-Sm, Lu(Yb), and Hf, Th, and U, respectively) along with an additional, in-house prepared resin for separating Rb. A simplified scheme is proposed for samples requiring the separation of Sr, Pb, Nd, and Hf only. Adverse effects of troublesome major elements (Fe, Ti) are circumvented by masking with ascorbic acid and hydrofluoric acid, respectively. Typical recoveries in the 85-95% range are achieved, with procedural blanks of 10-100 pg, negligible with regard to the amounts of analytes processed. The fractions separated are suitable for high precision isotope ratio measurements by TIMS or MC-ICP-MS, as demonstrated by the repeat analyses of several international reference materials of basaltic composition for Sr/Sr, Pb/Pb, Nd/Nd, Hf/Hf, and Th/Th. Concentration data could be obtained by spiking and equilibrating the sample with appropriate isotopic tracers before the onset of the separation process and, finally, measuring the isotope ratios modified by the isotope dilution process.

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Section: Discussionmentioning

confidence: 99%

Integrated Extraction Chromatographic Separation of the Lithophile Elements Involved in Long-Lived Radiogenic Isotope Systems (Rb–Sr, U–Th–Pb, Sm–Nd, La–Ce, and Lu–Hf) Useful in Geochemical and Environmental Sciences

Gannoun

2017

Anal. Chem.

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“…10,11 It provides a simple and effective means by which the separation and/or preconcentration of a variety of radioactive nuclides can be accomplished. 12,13 This makes it possible that the extraction chromatography combines the high selectivity of solvent extraction with the simplicity and multistage character of column operation system. Therefore, as an alternative separation method, application of extraction chromatography in HLW partitioning is meaningful.…”

Section: ' Introductionmentioning

confidence: 99%

Preparation of a Macroporous Silica-Based Pyridine Impregnated Material and Its Adsorption for Palladium

Zhang

Zhu

Liu

et al. 2011

Ind. Eng. Chem. Res.

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A macroporous silica-based 2,6-bis(5,6-di(iso-hexyl)-1,2,4-triazine-3-yl)pyridine (BDIHTP) multinitrogen molecular recognition material, BDIHTP/SiO2-P, was prepared. It was performed through impregnation and immobilization of BDIHTP into the pores of the macroporous SiO2-P particle support with a mean diameter of 50 μm. The adsorption of some typical alkali metal and alkaline earths Cs(I), Na(I), K(I), Rb(I), Sr(II), and Ba(II), as well as Pd(II), a representative of precious metals, contained in highly active liquid waste (HLW), onto the BDIHTP/SiO2-P material was investigated at 298 K. It was carried out by examining the effects of contact time and the HNO3 concentration in the range 0.3–5.0 M. BDIHTP/SiO2-P showed excellent adsorption ability and high selectivity for Pd(II) over all the tested metals, which had weak or almost no adsorption. It was attributed to the strong chemical complexation of Pd(II), a soft Lewis acid and an electron-pair acceptor, with nitrogen inside BDIHTP, a soft Lewis base and an electron-pair donor. On the basis of the related results, the chromatographic separation of Pd(II) from 1.0 M HNO3 solution containing the tested metals was performed by BDIHTP/SiO2-P packed column. Pd(II) was effectively eluted with 0.2 M thiourea and separated from the others. The results are very beneficial to building an effective partitioning of minor actinides and Pd(II) together from HLW by the BDIHTP/SiO2-P materials.

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“…[8][9][10] It combines the high selectivity of solvent extraction with the simplicity and multistage character of column operation system. Furthermore, extraction chromatography provides a simple and effective means by which the separation and/or preconcentration of a variety of radionuclides can be accomplished.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, extraction chromatography provides a simple and effective means by which the separation and/or preconcentration of a variety of radionuclides can be accomplished. [8][9][10] It combines the high selectivity of solvent extraction with the simplicity and multistage character of column operation system. Therefore, chromatographic separation of them from HLW is possible and feasible.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a macroporous silica–pyridine multidentate material and its adsorption behavior for some typical elements

2012

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A new macroporous silica‐based‐polymer (SiO2‐P) soft ligand composite material, 2,6‐bis(5,6‐di(iso‐butyl)‐1,2,4‐triazine‐3‐yl)pyridine (BDIBTP/SiO2‐P), was synthesized by impregnation and immobilization of BDIBTP and 1‐octanol molecules into the pores of the SiO2‐P particles. The impact of some typical alkali metal and alkaline earths Cs(I), Na(I), K(I), Rb(I), Sr(II), and Ba(II) containing in highly active liquid waste (HLW) on the adsorption of Pd(II) onto BDIBTP/SiO2‐P was studied. It was performed by examining the effects of contact time and the HNO3 concentration in the range of 0.3–7.0 M. BDIBTP/SiO2‐P showed strong adsorption ability and high selectivity for Pd(II) over all the tested metals. The chromatographic partitioning of Pd(II) from a simulated HLW solution was conducted by BDIBTP/SiO2‐P packed column. Pd(II) was effectively eluted with 0.2 M thiourea–0.1 M HNO3. The others showed no adverse impact on separation of Pd(II). The results are beneficial to partitioning of minor actinides and Pd(II) together from HLW by BDIBTP/SiO2‐P in the MPS process developed. © 2012 American Institute of Chemical Engineers AIChE J, 2012

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Separation and Preconcentration of Cesium from Acidic Media by Extraction Chromatography

Cited by 20 publications

References 43 publications

Integrated Extraction Chromatographic Separation of the Lithophile Elements Involved in Long-Lived Radiogenic Isotope Systems (Rb–Sr, U–Th–Pb, Sm–Nd, La–Ce, and Lu–Hf) Useful in Geochemical and Environmental Sciences

Integrated Extraction Chromatographic Separation of the Lithophile Elements Involved in Long-Lived Radiogenic Isotope Systems (Rb–Sr, U–Th–Pb, Sm–Nd, La–Ce, and Lu–Hf) Useful in Geochemical and Environmental Sciences

Preparation of a Macroporous Silica-Based Pyridine Impregnated Material and Its Adsorption for Palladium

Preparation of a macroporous silica–pyridine multidentate material and its adsorption behavior for some typical elements

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