Adsorption of gold-cyanide complex (Au(CN)2-) on nanoporous carbon and carbon spheres
Sherwood, A., Yin, C-Y and Hampton, M. (2013) Adsorption of gold-cyanide complex (Au(CN)2-) on nanoporous carbon and carbon spheres. In: Australian Nanotechnology Network Early Career Researcher Symposium, 25 - 26 July, Adelaide, South Australia.
In the Carbon-In-Pulp process, Au(CN)2- is adsorbed onto nanoporous carbon (activated carbon) directly from the cyanide ore pulp, followed by the elution of adsorbed gold from activated carbon1. A comparative investigation for the adsorption of the gold-cyanide complex (Au(CN)2-) on nanoporous carbon and carbon spheres was conducted to assess their potential for the aforementioned hydrometallurgical application. The nanoporous carbon used was commercial-based, cylindrically-shaped (size > 1.4 mm), extruded activated carbon manufactured by steam activation process while micro-sized carbon spheres (diameters 0.5 to 1 μm) were hydrothermally synthesised using a glucose precursor2,3 in a pressurised digestion vessel. Kinetic-based adsorption (i.e. bottle roll kinetic testing) studies were performed with both adsorbents characterised by scanning electron microscopy integrated with energy-dispersive X-ray spectroscopy (SEM-EDX) and surface analysis. Results indicated that adsorption using nanoporous carbon was kinetically more favorable than carbon spheres, which was most probably attributed to the high surface area of the former.
|Publication Type:||Conference Item|
|Murdoch Affiliation:||School of Veterinary and Life Sciences|
|Conference Website:||http://www.ausnano.net/_files/2013 ANN Early Caree...|
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