Temperature and concentration effect of thiosulfates on the dissolution rate of silver contained in mining waste using S 2O 3 2--O 2-Zn 2+ solutions

被引：3

作者：

Efecto de la Temperatura y Concentración de Tiosulfatos sobre la Velocidad de Disolución de Plata contenida en Desechos Mineros usando Soluciones S2O32--O2-Zn 2+

机构：

[1] Universidad Autónoma Del Estado de Hidalgo, Área Académica de Ciencias de la Tierra y Materiales, C.P. 42184 Mineral de la Reforma, Hidalgo

来源：

Juárez, J.C. (jutj731101@hotmail.com) | 1600年 / Centro de Informacion Tecnologica卷 / 23期

关键词：

Leaching; Silver; Tailings; Thiosulfates;

D O I：

10.4067/S0718-07642012000400015

中图分类号：

学科分类号：

摘要：

The effect of the temperature and thiosulfate concentration on the dissolution rate of silver contained in mining wastes, using the system S 2O 3 2-O 2-Zn 2+ was studied. In the State of Hidalgo in México, thousands of tons of waste mining having around 71 grams of silver per ton of waste have been accumulated over the years. This is the main reason that motivates this study. It was observed that the temperature drastically affects the leaching rate of the silver showing an activation energy Ea= 55.85 kJ mol- 1, implying that the dissolution reaction is controlled by the chemical reaction. The thiosulfate concentration shows a considerable influence on the precious metal dissolution rate. The maximum silver dissolution was found to be approximately 97% at 45 °C and 40 gL- 1 of [S 2O 3 2-]. It is concluded that the process studied represents a good alternative when compared to other processes such as the toxic cyanidation reaction.

引用

页码：133 / 138

页数：5