Fh. Elsweify, SORPTION AND SEPARATION OF SOME ELEMENTS OF NUCLEAR IMPORTANCE USING CHELEX-100, Journal of radioanalytical and nuclear chemistry, 222(1-2), 1997, pp. 55-59
Chelex-100, in the anionic form has been studied for its ability to pe
rform selective separation and concentration of some metal ions of nuc
lear importance from mineral acid solutions. The sorption behavior of
Zr(IV)-Nb(V), Mo(VI), Tc(VII), Te(IV) and U(VI) from solutions of hydr
ochloric and sulphuric acids on Chelex-100 has been studied under stat
ic and dynamic conditions. Mo(VI) and Tc(VII) have been concentrated o
n the resin from hydrochloric or sulphuric acid solutions at low acidi
ties probably, as the anions MoO42- and TcO4-, respectively. Te(IV) ha
s been isolated from hydrochloric acid solutions of normalities greate
r than or equal to 6 in the form of the anionic chloro complex TeCl62-
. Optimum conditions for elution and separation of Mo(VI), Tc(VII), Te
(TV) and U(VT) were recommended.