Collect. Czech. Chem. Commun. 1990, 55, 924-929

Voltammetric study of the electrochemical stripping of galenite using a rotating ring-disk electrode

Šárka Hoškováa, Přemysl Beranb and Tomáš Beranc

a Institute of Hydrodynamics, Czechoslovak Academy of Sciences, 166 12 Prague 6
b Department of Analytical Chemistry, Charles University, 128 40 Prague 2
c Institute for Ore Research, 252 10 Mníšek pod Brdy


A study was carried out of the electrochemical stripping of galenite in the form of a disk electrode with a gold ring, in 0.1M-NaClO4 base electrolyte. It was found that lead is reduced from the galenite at potentials more negative than -1 V and remains on the surface of the electrode. The reduced lead is electrochemically stripped from the electrode at potentials more positive than -0.5 V. At potentials more positive than +0.4 V, PbS is further oxidized to Pb(IV). The degree of oxidation increases with increasing potential.