The Solvent Extraction of Heptavalent Technetium by Tributyl Phosphate
- 1 October 1981
- journal article
- liquid liquid-extraction
- Published by Taylor & Francis in Separation Science and Technology
- Vol. 16 (9) , 1157-1179
- https://doi.org/10.1080/01496398108057605
Abstract
The solvent extraction of heptavalent technetium from aqueous nitric or hydrochloric acid by tributyl phosphate in n-dodecane (TBP-NDD) has been studied over a wide range of TBP and acid concentrations at 25, 50, and 60°C. The extraction was found to proceed according to the reaction 3TBP + H+ + TcO4 − → (HTcO4 · 3TBP). A discussion of possible reaction mechanisms is presented, along with values for ΔG, ΔH, ΔS, and the equilibrium constant for the extraction reaction. Finally, evidence for the coextraction of technetium by uranyl ions is discussed.Keywords
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