skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Extraction of Am(III) and Eu(III) nitrates by 2,6-di-(5,6-dipropyl-1,2,4-triazin-3-yl)pyridines

Abstract

The extraction of Am(III) and Eu(III) by 2,6-di(5,6-dipropyl-1,2,4-triazin-3-yl)-pyridines from mostly 1.9M (HNO{sub 3} + NH{sub 4}NO{sub 3}) was studied. The compound with n-propyl (DPTP) forms dimers and trimers in mixed branched alkanes modified with 2-ethyl-1-hexanol. The self-association is supported by enhancing the NHO{sub 3} concentration from 0.3 to 0.9 M. In the above modified diluent, DPTP extracts Am(III) and Eu(III) nitrates as the complexes Am(NO{sub 3}){sub 3}{center{underscore}dot}HNO{sub 3}{center{underscore}dot}3B and Eu(NO{sub 3}){sub 3}{center{underscore}dot}HNO{sub 3}{center{underscore}dot}3B. The Am(III)/Eu(III) separation factor is typically 100--120. The extraction and separation efficiency of DPTP strongly decreases in the order of diluents (each modified with 2-ethyl-1-hexanol) branched alkanes > cyclohexane > 2-methyl-4-pentanone > 2-ethylhexyl acetate > benzene > chlorobenzene > xylene. 1-Octanol and 2-ethyl-1-hexanol modifiers support appropriately the solubility of protonated forms of DPTP in branched alkanes, and moderately enhance the extraction of Am(III) and Eu(III). 1-Butanol modifier allows a higher extraction efficiency but supports less the solubility. The optimum extraction and separation efficiency is attained at 10--20 vol% modifier. The isopropyl analogue extracts Am(III) more effectively than DPTP, but the extraction is slow and the separation from Eu(III) is inefficient.

Authors:
; ;
Publication Date:
Research Org.:
Forschungszentrum Karlsruhe (DE)
OSTI Identifier:
20000553
Resource Type:
Journal Article
Journal Name:
Solvent Extraction and Ion Exchange
Additional Journal Information:
Journal Volume: 17; Journal Issue: 5; Other Information: PBD: Sep 1999; Journal ID: ISSN 0736-6299
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 05 NUCLEAR FUELS; AMERICIUM NITRATES; EUROPIUM NITRATES; SOLVENT EXTRACTION; PYRIDINES; EFFICIENCY; HIGH-LEVEL RADIOACTIVE WASTES; RADIOACTIVE WASTE PROCESSING

Citation Formats

Kolarik, Z., Muellich, U., and Gassner, F. Extraction of Am(III) and Eu(III) nitrates by 2,6-di-(5,6-dipropyl-1,2,4-triazin-3-yl)pyridines. United States: N. p., 1999. Web. doi:10.1080/07366299908934641.
Kolarik, Z., Muellich, U., & Gassner, F. Extraction of Am(III) and Eu(III) nitrates by 2,6-di-(5,6-dipropyl-1,2,4-triazin-3-yl)pyridines. United States. doi:10.1080/07366299908934641.
Kolarik, Z., Muellich, U., and Gassner, F. Wed . "Extraction of Am(III) and Eu(III) nitrates by 2,6-di-(5,6-dipropyl-1,2,4-triazin-3-yl)pyridines". United States. doi:10.1080/07366299908934641.
@article{osti_20000553,
title = {Extraction of Am(III) and Eu(III) nitrates by 2,6-di-(5,6-dipropyl-1,2,4-triazin-3-yl)pyridines},
author = {Kolarik, Z. and Muellich, U. and Gassner, F.},
abstractNote = {The extraction of Am(III) and Eu(III) by 2,6-di(5,6-dipropyl-1,2,4-triazin-3-yl)-pyridines from mostly 1.9M (HNO{sub 3} + NH{sub 4}NO{sub 3}) was studied. The compound with n-propyl (DPTP) forms dimers and trimers in mixed branched alkanes modified with 2-ethyl-1-hexanol. The self-association is supported by enhancing the NHO{sub 3} concentration from 0.3 to 0.9 M. In the above modified diluent, DPTP extracts Am(III) and Eu(III) nitrates as the complexes Am(NO{sub 3}){sub 3}{center{underscore}dot}HNO{sub 3}{center{underscore}dot}3B and Eu(NO{sub 3}){sub 3}{center{underscore}dot}HNO{sub 3}{center{underscore}dot}3B. The Am(III)/Eu(III) separation factor is typically 100--120. The extraction and separation efficiency of DPTP strongly decreases in the order of diluents (each modified with 2-ethyl-1-hexanol) branched alkanes > cyclohexane > 2-methyl-4-pentanone > 2-ethylhexyl acetate > benzene > chlorobenzene > xylene. 1-Octanol and 2-ethyl-1-hexanol modifiers support appropriately the solubility of protonated forms of DPTP in branched alkanes, and moderately enhance the extraction of Am(III) and Eu(III). 1-Butanol modifier allows a higher extraction efficiency but supports less the solubility. The optimum extraction and separation efficiency is attained at 10--20 vol% modifier. The isopropyl analogue extracts Am(III) more effectively than DPTP, but the extraction is slow and the separation from Eu(III) is inefficient.},
doi = {10.1080/07366299908934641},
journal = {Solvent Extraction and Ion Exchange},
issn = {0736-6299},
number = 5,
volume = 17,
place = {United States},
year = {1999},
month = {9}
}