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  • Raman spectroelectrochemical investigations of the leaching of gold in chloride and thiosulfate media

    Author(s)
    Woods, Ronald
    Hope, Gregory
    Watling, Kym
    I. Jeffrey, Matthew
    Griffith University Author(s)
    Hope, Gregory A.
    Watling, Kym M.
    Woods, Ronald
    Year published
    2005
    Metadata
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    Abstract
    Surface enhanced Raman spectroscopy carried out in real time has been applied to identify surface species formed during gold leaching in chloride and thiosulfate media. Chloride ion is adsorbed prior to the gold dissolution potential, but its coverage is significantly diminished at the beginning of leaching. A gold chloride band is again observed when dissolution is rapid, together with bands characteristic of AuCl4- ions in solution. With thiosulfate, a thin gold sulfide layer is formed slowly in the potential region where leaching occurs. At higher potentials, thiosulfate is oxidized to sulfur and sulfate, both products ...
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    Surface enhanced Raman spectroscopy carried out in real time has been applied to identify surface species formed during gold leaching in chloride and thiosulfate media. Chloride ion is adsorbed prior to the gold dissolution potential, but its coverage is significantly diminished at the beginning of leaching. A gold chloride band is again observed when dissolution is rapid, together with bands characteristic of AuCl4- ions in solution. With thiosulfate, a thin gold sulfide layer is formed slowly in the potential region where leaching occurs. At higher potentials, thiosulfate is oxidized to sulfur and sulfate, both products being identified by Raman spectroscopy.
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    Conference Title
    Innovations In Natural Resource Processing: Proceedings Of The Jan. D. Miller Symposium Volume 2005
    Publisher URI
    http://books.google.com.au
    Subject
    Multi-Disciplinary
    Publication URI
    http://hdl.handle.net/10072/27994
    Collection
    • Conference outputs

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