Retention of radionuclides on metal sulphide precipitates.
The retention of various radionuclides on metal sulphide precipitates has been studied. The sulphide precipitates quantitatively retained the common radionuclides. The condition for 100% retention in a thin layer is small particle size (a few microm) in the precipitate. This can be ensured by pulverization of the dried precipitate of metal sulphide. (203)Hg(2+) is retained by mercury sulphide and (65)Zn(2+) by zinc sulphide by isotopic exchange. The retention of foreign radioactive ions can be reduced or even eliminated by counter-carrier technique in cases where the retention is not due to chemical reaction, precipitate exchange. The isotopic exchange with mercury(II) sulphide and zinc sulphide enables mercury and zinc ions to be separated rapidly and determined in the presence of a number of interfering ions.
Gimesi
O
O
Institute for General and Analytical Chemistry of the Technical University, Budapest, Hungary.
Bányai
E
E
Csajka
M
M
Szabadházy
A
A