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Effect of the nature of organophosphorous acid moiety on co-extraction of U(VI) and mineral acid from aqueous solutions using D2EHPA, PC88A and Cyanex 272

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Title Effect of the nature of organophosphorous acid moiety on co-extraction of U(VI) and mineral acid from aqueous solutions using D2EHPA, PC88A and Cyanex 272
 
Creator DAS, D
JUVEKAR, VA
RUPAWATE, VH
RAMPRASAD, K
BHATTACHARYA, R
 
Subject SOLVENT-EXTRACTION
URANIUM(VI)
TBP
SEPARATION
MECHANISM
PHOSPHATE
SULFATE
Co-extraction
U(VI)
D2EHPA
PC88A
Cyanex 272
 
Description The effect of organophosphorous moieties of three acid ligands, D2EHPA, PC88A and Cyanex 272, dissolved in light liquid paraffin, on extraction of U(VI) and mineral acid was studied using the Bulk-Liquid Membrane (BLM) technique. A kinetic model was developed to predict the concentration of acid and U(VI) in the feed, organic and the strip phases during extraction. Acid extraction by complexing ligands was found to be significant. The extraction of U(VI) by these three acidic ligands in different mineral acids followed the order HNO3 > HCl > H2SO4. The distribution coefficient for acid and U(VI) extraction increased with increase in '-OR' moieties in the acid ligands i.e. in the order D2EHPA > PC88A > Cyanex 272. The suitability of a ligand for liquid emulsion membrane (LEM) application depends upon the ratio of rates of extraction of U(VI) and acid (HNO3). The study showed that the ratios are in the order D2EHPA > PC88A > Cyanex 272. (C) 2015 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2016-01-14T13:49:21Z
2016-01-14T13:49:21Z
2015
 
Type Article
 
Identifier HYDROMETALLURGY, 152,129-138
0304-386X
1879-1158
http://dx.doi.org/10.1016/j.hydromet.2014.12.018
http://dspace.library.iitb.ac.in/jspui/handle/100/17656
 
Language en