Abstract
The recovery of Au from rich cyanidation solutions is usually carried out by adsorption on activated carbon, a process that presents as its main disadvantage the formation of fines in the classifying screens, these fines represent a considerable loss of values in the process, which is why The search for alternatives that allow the recovery of gold and silver from rich cyanidation solutions is of interest to hydrometallurgy. In this sense, magnetic pre-concentration could be an alternative for said process. the present work shows the study of the removal of AgNO3 and [Ag(CN)2]- in synthetic aqueous systems with mesoporous amino and/or thiol silicas modified with magnetite (MS-NH2-Fe3O4 and MSNH2-SH-Fe3O4) . It is observed that the presence of ligands of a softer nature favors the removal of Ag in AgCN systems, showing low removal capacity for amine materials.
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