Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 253: Issue 2
Extraction and separation of Th(IV) and U(VI) from nitric acid media using PIA-8 and HDEHP
Authors:
D. Koladkar University of Mumbai Inorganic Chemistry Laboratory, Department of Chemical Technology Matunga, Mumbai 400019 India

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P. Dhadke University of Mumbai Inorganic Chemistry Laboratory, Department of Chemical Technology Matunga, Mumbai 400019 India

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Pages:
297–302
Online Publication Date:
01 Nov 2004
Publication Date:
17 Aug 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1019666213038
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Abstract  

Extraction behavior of Th(IV) and U(VI) has been investigated with bis(2-ethylhexyl) phosphinic acid (PIA-8) and bis(2-ethylhexyl) phosphoric acid (HDEHP) from nitric acid media in toluene. The optimum conditions for extraction of these metals have been established by studying various parameters like acid concentration, pH, reagent concentration, diluents and shaking time. The extraction of Th(IV) was found to be quantitative with 0.3-2.5M HNO3 by 2.5.10-2M HDEHP and in the pH range 0.1-2.5 with 2.3.10-2M PIA-8 in toluene. U(VI) was completely extracted in the acidic range of 0.1-2.0M HNO3 with 2.2.10-2M HDEHP and in the pH range of 1.0-3.0 with 2.0.10-2M PIA-8 in toluene. The probable extracted species have been ascertained by log D-log c plot as UO2 R2.2HR with both the reagents and Th (NO3)2R2.2HR with PIA-8 and Th (NO3)3R.3HR with HDEHP, respectively. Temperature dependence of the extraction equilibrium is examined by the temperature variation method. Separation of U(VI) and Th(IV) was also carried out from commonly associated metals.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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