Nucleation, growth and overlap of nanoscopic sulfur domains during galena oxidation

Hampton, M. A., Plackowski, C. and Nguyen, A.V. (2011). Nucleation, growth and overlap of nanoscopic sulfur domains during galena oxidation. In: Chemeca 2011 Proceedings. Chemeca 2011: Australasian Conference on Chemical Engineering, Sydney, Australia, (1-10). 18-21 September 2011.

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Author Hampton, M. A.
Plackowski, C.
Nguyen, A.V.
Title of paper Nucleation, growth and overlap of nanoscopic sulfur domains during galena oxidation
Conference name Chemeca 2011: Australasian Conference on Chemical Engineering
Conference location Sydney, Australia
Conference dates 18-21 September 2011
Proceedings title Chemeca 2011 Proceedings
Place of Publication Barton, ACT, Australia
Publisher Engineers Australia
Publication Year 2011
Sub-type Fully published paper
ISBN 9780858259225
Start page 1
End page 10
Total pages 10
Collection year 2012
Language eng
Abstract/Summary The oxidation of sulfide minerals, such as galena (PbS), in aqueous solutions is of critical importance for effective flotation. Despite attempts over many decades, a comprehensive understanding on the formation of oxidation species at the surface is lacking. Much controversy over the oxidation products exists. A number of oxidation pathways have been proposed and experimental evidence for the formation of elemental sulfur, metal polysulfide, metal-deficient lead sulfide and sulfate have been shown and argued. It is the purpose of this work to provide a clear understanding the oxidative species present at an electrochemical oxidized galena surface at pH 4.5, and to give further insight into the kinetics formation. Utilizing a novel experimental system that combines chronoamperometry, Atomic Force Microscopy imaging, Raman spectroscopy and XPS, the nucleation, growth and overlap of nanoscopic islands of elemental sulfur at low anodic potentials are detected.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Chemical Engineering Publications
Official 2012 Collection
 
Citation counts: Google Scholar Search Google Scholar
Created: Wed, 12 Oct 2011, 23:20:24 EST by Professor Anh Nguyen on behalf of School of Chemical Engineering