Estudio Cinético de la Lixiviación de Plata en el Sistema S2O3(2-)-O2-Cu2+ Contenido en Residuos Minero-Metalúrgicos

a study on the leaching kinetics of silver involved in the system s2o32- -o2-cu2+ that is found in the tailings of dos carlos in the state of hidalgo in mexico. the concentration of [s2o32-] considerably affects the leaching rate obtaining a value of 0.o98 for the order of reaction in the range of concentrations from15.8 to 126.4 gl-1 of s2o32-, achieving silver recovery of 73%. the effect of temperature and of the addition of copper has been also analyzed. temperature has a remarkable effect over the overall reaction rate in the range from 15 to 60 °c. solutions of silver of 97% were obtained at the highest temperature of the study obtaining a value of 43 kj mol-1 for the activation energy. copper addition favored the leaching rate of silver, obtaining a reaction order of 0.35 with respect to the concentration of [cu2+] and reaching 95% of leached silver.