Liquid-liquid extraction of uranium from Egyptian phosphoric acid using a synergistic D2EHPA-DBBP mixture | Health & Environmental Research Online (HERO)

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Citation
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HERO ID

4344222

Reference Type

Journal Article

Title

Liquid-liquid extraction of uranium from Egyptian phosphoric acid using a synergistic D2EHPA-DBBP mixture

Author(s)

Abdel-Khalek, AA; Ali, MM; Hussein, AEM; Abdel-Magied, AF

Year

2011

Is Peer Reviewed?

Yes

Journal

Journal of Radioanalytical and Nuclear Chemistry
ISSN: 0236-5731
EISSN: 1588-2780

Volume

288

Issue

Page Numbers

1-7

Language

English

DOI

10.1007/s10967-010-0964-z

Web of Science Id

WOS:000288220400001

URL

http://link.springer.com/10.1007/s10967-010-0964-z
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Abstract

Extraction of uranium from Egyptian phosphoric acid with synergistic mixture of di-2-ethylhexylphosphoric acid (D2EHPA) and di-butyl butyl phosphonate (DBBP) is reported in this paper. The influence of various factors such as D2EHPA concentration, DBBP concentration, phosphoric acid concentration, contact time, aqueous: organic phase's ratio (aq:org) and temperature on the degree of extraction has been established. The data on the effect of temperature on the extraction showed that the enthalpy change is -23.12 kJ/mol. Uranium extracted by D2EHPA-DBBP is further subjected to a second cycle of extraction and scrubbing impurities. The uranium is finally converted to a high purity UO(3) product using precipitation with hydrogen peroxide and heat treatment at 375 A degrees C.

Keywords

Liquid-Liquid extraction; Uranium; Phosphoric acid; Kinetics