Coextraction and successive selective stripping of cerium(IV) and thorium from monazite leach solutions with tributyl phosphate (TBP)
- Authors: Ali A.H.1
-
Affiliations:
- Nuclear Materials Authority
- Issue: Vol 59, No 6 (2017)
- Pages: 579-586
- Section: Article
- URL: https://journals.rcsi.science/1066-3622/article/view/224249
- DOI: https://doi.org/10.1134/S10663622170600054
- ID: 224249
Cite item
Abstract
Solvent extraction of Ce(IV) and Th(IV) from 8 M HNO3 with TBP in kerosene was studied. The dependence of the extraction on the TBP concentration, kind of diluent, O/A phase ratio, and contact time was examined. The extraction efficiency reaches 99.3 and 97.7% for Ce and Th, respectively, at 5% TBP in kerosene, 1/1 O/A phase ratio, and 5 min contact time. Successive selective stripping of Ce(III) and Th(IV) from the loaded organic phase was reached at 1.1 M H2O2 concentration, 10 min contact time, 3/1 O/A phase ratio, and room temperature (25 ± 2°C). After stripping of cerium, the remaining organic was contacted with H2O for thorium stripping at 5 min contact time, 2/1 O/A phase ratio, and room temperature (25 ± 2°C).
Keywords
About the authors
A. H. Ali
Nuclear Materials Authority
Author for correspondence.
Email: amr_nma@yahoo.com
Egypt, Maadi, Cairo