(Taylor and Francis Online, 2015-01-19) Adebayo, A.O.; Olasehinde, E.F.
The leaching of lead from galena in acidic hydrogen peroxide in presence of sodium chloride
solution has been investigated with respect to the effects of hydrochloric acid and hydrogen
peroxide concentrations, by changing the stirring speed, leaching temperature and the particle
size. It was observed that leaching rate increases with increasing hydrochloric acid concentration,
hydrogen peroxide concentration and the temperature. However, it decreases with increase in the
particle size. The kinetic study showed that the leaching process is represented by shrinking core
model with mixed kinetic. The activation energy (Ea) for the leaching reaction was calculated as
14·60 kJ mol−1, which is suggestive of the mixed controlled kinetics for the leaching reaction