Abstract
Solvent extraction of pertechnetate anions from aqueous solutions of some mineral acids (HCl, HNO3, HClO4, H2SO4), (NaCl, NaNO3, NaClO4, K2CrO4, NaCO3), NaOH and NH4OH by tetraphenylphosphonium chloride in chloroform and nitrobenzene was studied. The results are presented in the form of the dependencies of extraction characteristics of TcO 4 − (distribution ratio, percentage of extraction) on the (C6H5)4PCl, H+ and competitive anion concentrations. The solvent extraction of sub-and super-stoichiometric ratio of TcO 4 − : (C6H5)4P+ was performed. The extraction constant values of ion pairs TcO 4 − −Cl−, TcO 4 − −NO 3 − , TcO 4 − −ClO 4 − and of individual anions TcO 4 − , Cl−, NO 3 − , ClO 4 − were calculated.
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