Comparative study of the extraction of Te(IV) from various aqueous solutions using different organic diluents and solvents

The extraction of Te(IV) from aqueous solutions containing various ligands was studied using various inert organic diluents and other solvents. The extraction was carried out from solutions of various mineral (HCl, HBr, HI, HNO₃) and organic (citric, oxalic) acids of various concentrations. The organic phase was an inert diluent (cyclohexane, CCl₄, chloroform, benzene, p-xylene, toluene, nitrobenzene) or a solution of 20 vol % Aliquat-336, 20 vol % trioctylamine, or 30 vol % TBP in p-xylene. A correlation between the distribution of Te(IV) and some physicochemical properties of the diluents and the possibility of extraction separation radioactive Te isotopes and their daughters, i.e., radioactive I isotopes, were examined. In most cases, the Te(IV) distribution ratio decreases in the order nitrobenzene > CHCl₃ > CCl₄ > p-xylene > benzene > toluene > cyclohexane. Published in Russian in Radiokhimiya, 2007, Vol. 49, No. 4, pp. 353–358. The text was submitted by the authors in English. An erratum to this article is available at .