Determination of surface gold preg-robbed on carbonaceous matter from AC-POX/CIL stream products

Deliverables:

  • Characterization of different types of carbonaceous matter present in the sample:
    • Composition established by SEM/EDX (scanning electron microscopy coupled with energy dispersive x-ray analysis)
    • Structure (maturity) of the carbonaceous matter determined by laser Raman  spectroscopy
    • Preg-robbing capacity of each type of carbonaceous matter evaluated by ToF-SIMS
  • Speciation and quantification of surface gold preg-robbed on carbonaceous matter by ToF-SIMS:
    • Detection (“speciation”) of different forms of gold preg-robbed on carbonaceous matter:  metallic gold Au° and gold compounds (Au(CN)2–, AuCl2–, AuS(CN)2–…)
    • Quantification of the established forms of preg-robbed gold based on compound-specific Au standards in activated carbon
    • Independent evaluation of the total amount of surface gold preg-robbed on carbonaceous matter
  • Written report