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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Ed. by Qaim, Syed M.

12 Issues per year

IMPACT FACTOR 2016: 1.271
5-year IMPACT FACTOR: 1.286

CiteScore 2016: 1.20

SCImago Journal Rank (SJR) 2016: 0.486
Source Normalized Impact per Paper (SNIP) 2016: 0.761

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Volume 97, Issue 6 (Jun 2009)


Extraction of uranium(VI) with diamides of dipicolinic acid from nitric acid solutions

J. L. Lapka / Alena Paulenova / M. Yu. Alyapyshev / V. A. Babain / R. S. Herbst / Jack D. Law
Published Online: 2009-09-25 | DOI: https://doi.org/10.1524/ract.2009.1588


Three structural isomers of diamides of dipicolinic acid (N,N′-diethyl-N,N′-ditolyl-dipicolinamide, EtTDPA) with varying position of the methyl group on the tolyl ring have been synthesized and investigated on extractability toward U(VI). The polar diluent FS-13 was used, and distribution ratios of U(VI) were studied as a function of nitric acid, ligand, and lithium nitrate concentrations. Extractability of uranium was shown to increase with increased concentration of nitrate and ligands. Infrared spectra of organic extraction phases indicate that nitric acid is coextracted as part of the neutral metal-ligand complex with U(VI) and EtTDPA through hydrogen bonding with the carbonyl group in the amide moiety.

Keywords: UNEX; Extraction; Dipicolinic acid; Uranium; FS-13

About the article

* Correspondence address: Chemistry Department, Oregon State University, Corvallis, Oregon, U.S.A.,

Published Online: 2009-09-25

Published in Print: 2009-06-01

Citation Information: Radiochimica Acta International journal for chemical aspects of nuclear science and technology, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1524/ract.2009.1588.

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