SELECTIVE EXTRACTION OF Am(III) OVER Eu(III) BY 2,6-DITRIAZOLYL- AND 2,6-DITRIAZINYLPYRIDINES1

Kolařík, Z.; Müllich, Udo; Gaßner, Franz

doi:10.1080/07360299908934598

Cited by 358 publications

(284 citation statements)

References 3 publications

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“…tri-tertio-butyl-pyridyl-triazine, T t BuPTZ), were able to separate An(III) from Ln(III) when mixed with lipophilic anions. [1,2] However, bis-triazinyl-pyridines (BTP, Figure 1), a new family of nitrogen-containing polydendate ligands recently developed by Z. Kolarik et al [3] in the framework of a European contract led by CEA-Marcoule, 1 appeared to be very efficient and selective extracting agents towards An(III), even from very acidic aqueous solutions (e.g. [HNO 3 ] ≥2 mol/L).…”

Section: Introductionmentioning

confidence: 99%

Sanex-Btp Process Development Studies

Hill¹,

Guillaneux

Berthon

et al. 2002

Journal of Nuclear Science and Technology

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Bis-triazinyl-pyridines (BTPs) have been developed at CEA-Marcoule to separate actinides(III) from lanthanides(III). Although high separation performances were observed in the counter-current hot test carried out in 1999 on a highly active effluent, the extraction and back-extraction yields of actinides(III) were lower than expected from calculation. A strong sensitivity of the extractant towards air oxidation and acidic hydrolysis was actually pointed out. Therefore, the hydrolysis of bis-triazinylpyridines was deeply investigated (qualitative determination of the degradation products) in different experimental conditions. It appeared that the branching of the alkyl groups on the α position of the triazine rings hindered the hydrolysis of the extractant. The formulation of the solvent was thus optimised and tested again in 2001 on a genuine DIAMEX back-extraction solution in the ATALANTE facility. 454

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Section: Introductionmentioning

confidence: 99%

Sanex-Btp Process Development Studies

Hill¹,

Guillaneux

Berthon

et al. 2002

Journal of Nuclear Science and Technology

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“…4) To develop a partitioning process using the extraction chromatography technique, Wei et al reported an excellent adsorbent for extraction chromatography.…”

Section: 3)mentioning

confidence: 99%

Separation of Trivalent Minor Actinides from Fission Products Using Single R-BTP Column Extraction Chromatography

Matsumura

MATSUMURA

Morita

et al. 2011

Journal of Nuclear Science and Technology

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“…7,8) Pyridine-based ligands have been shown to enhance the liquid-liquid extraction of uranium and the minor actinides from lanthanide actinide mixtures. [9][10][11] They probably have affinity to U(VI) compared to those coordinating with oxygen atoms, 9) although the stability constant of pyridine with U(VI) is not known. We investigated the association and dissociation of U(VI) on 4-mercaptopyridine SAM (4-PyS-SAM) to elucidate interactions of 4-PyS-SAM with U(VI).…”

Section: Introductionmentioning

confidence: 99%

Sorption of U(VI) on the 4-Mercaptopyridine Self-Assembled Monolayer

Nankawa

Ozaki

Francis

et al. 2008

J. Nucl. Sci. Technol.

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The sorption of U(VI) on the 4-mercaptopyridine self-assembled monolayer (4-PyS-SAM) on Au(111) was studied by cyclic voltammetry. Cyclic voltammograms (CVs) of the 4-PyS-SAM working electrode were obtained by contact with 1 mM UO 2 (NO 3 ) 2 solution, 1 mM UO 2 (NO 3 ) 2 and 50 mM acetic acid solution, or 1 mM UO 2 (NO 3 ) 2 and 50 mM oxalic acid solution for 6 h at pH 4. The reduction current of U(VI) to U(V) was detected in the CV. The CV of the U(VI) associated 4-PyS-SAM after transport to U(VI)-free 0.1 M NaClO 4 solution showed that the reduction current was detected in the cases of UO 2 (NO 3 ) 2 and U(VI)-acetate, but not in the case of U(VI)-oxalate solution, indicating that U(VI) was adsorbed on the 4-PyS-SAM from the UO 2 (NO 3 ) 2 and U(VI)-acetate solutions, but not from U(VI)-oxalate solution. These results suggest that stability of U(VI)-4-PyS-SAM is not so high that U(VI)-4-PyS-SAM cannot be formed in the presence of 50 mM oxalate.

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SELECTIVE EXTRACTION OF Am(III) OVER Eu(III) BY 2,6-DITRIAZOLYL- AND 2,6-DITRIAZINYLPYRIDINES1

Cited by 358 publications

References 3 publications

Sanex-Btp Process Development Studies

Sanex-Btp Process Development Studies

Separation of Trivalent Minor Actinides from Fission Products Using Single R-BTP Column Extraction Chromatography

Sorption of U(VI) on the 4-Mercaptopyridine Self-Assembled Monolayer

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