Analysis of the adsorption of gold and silver on magnetic species formed in the electrocoagulation process

José R. Parga*, Jesús L. Valenzuela, Victor Vazquez

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In metallurgical operations, cyanidations is the predominant process by which gold and silver are recovered from their ores and it is recognized that the Carbon in Pulp, Merrill-Crowe process or the Ion Exchange resins are used for the concentrations and purification of gold and silver from cyanide solutions. Among several options are available for recovery precious metals from cyanide solutions, Electrocoagulation (EC) is a very promising electrochemical treatment technique that does not require high concentrations of gold and silver in solutions. First, this study will provide an introduction to the fundamental concepts of the EC method for recovery precious metals from cyanide solutions. In this research, X-ray Diffraction, SEM and Transmission Mossbauer Spectroscopy were used to characterize the solid products formed at iron electrodes during the EC process. The results suggest that magnetite particles and amorphous iron oxyhydroxides present in the EC products remove gold and silver in 5 minutes.

Original languageEnglish
Title of host publicationMaterials Processing and Energy Materials
PublisherMinerals, Metals and Materials Society
Pages267-275
Number of pages9
ISBN (Print)9781118029459
DOIs
StatePublished - 2011

Publication series

NameTMS Annual Meeting
Volume1

Keywords

  • Adsorption process
  • Amorphous iron
  • Electrocoagulation gold and silver

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