Solvent extraction studies with some fission product elements from nitric acid media employing tri-iso-amyl phosphate and tri-n-butyl phosphate as extractants

• Published in: Journal of radioanalytical and nuclear chemistry Vol. 303; no. 3; pp. 2165 - 2172
• Main Authors: Sreenivasulu, B., Suresh, A., Sivaraman, N., Vasudeva Rao, P. R.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.03.2015; Springer
• Subjects: Chemistry; Chemistry and Materials Science; Diagnostic Radiology; Hadrons; Heavy Ions; Inorganic Chemistry; Nuclear Chemistry; Nuclear Physics; Phosphates; Physical Chemistry; Uranium; Degradation; tetradecane; Fission products; TiAP; TBP; Dodecane and
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-014-3751-4

Tri- iso -amyl phosphate (TiAP) has been identified as an alternate extractant to tri- n -butyl phosphate (TBP) for the reprocessing of fast reactor fuels. In the present work, extraction behaviour of some fission product elements such as Zr(IV), RuNO(III), TcO 4 - , La(III), Ce(III) and Nd(III) along with Am(III) has been investigated with 1.1 M solutions of TiAP and TBP in n -alkane diluents from nitric acid medium. The extraction of Zr(IV) has been evaluated with unirradiated and gamma irradiated solvents as a function of organic phase uranium(VI) loading. The influence of degradation products of TiAP and TBP on the extraction behaviour of fission products has also been examined. The effect of diluent degradation products and effect of alkali wash on the extraction of Zr(IV) is discussed. The formation of interfacial deposits during the washing of gamma irradiated solvents with alkali solution is also discussed.