SOLVENT-EXTRACTION OF HEPTAVALENT TECHNETIUM

Faculty	Science	Year:	1992
Type of Publication:	Article	Pages:	363-373
Authors:	ELKOT, AM	DOI:	10.1007/BF02034810
Journal:	JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES AKADEMIAI KIADO	Volume:	163
Research Area:	Chemistry; Nuclear Science \& Technology	ISSN	ISI:A1992KC94100018
Keywords :	SOLVENT-EXTRACTION , HEPTAVALENT TECHNETIUM
Abstract:	An extraction study was performed on technetium in its highest oxidation state as a function of nitric acid concentration at 25, 50 and 70-degrees-C. A long chain amine (tri-n-octylamine TOA) and an organophosphorus solvent (TBP) have been investigated. Addition of NH4NO3 has a salting-out effect on the extraction of TBP in the aqueous phase and therefore decreases the distribution coefficient for heptavalent technetium. The mechanism of extraction is discussed in the light of the results obtained.
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