An AFM and cyclic voltammetry study of sulphide mineral oxidation

Hampton, Marc, Plackowski, Chris and Nguyen, Anh (2010). An AFM and cyclic voltammetry study of sulphide mineral oxidation. In: Chemeca: Australasian Conference on Chemical Engeering (2010). 40th Annual Australasian Chemical and Process Engineering Conference, Adelaide, South Australia, (1-11). 26–29 September 2010.

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Name Description MIMEType Size Downloads
Author Hampton, Marc
Plackowski, Chris
Nguyen, Anh
Title of paper An AFM and cyclic voltammetry study of sulphide mineral oxidation
Conference name 40th Annual Australasian Chemical and Process Engineering Conference
Conference location Adelaide, South Australia
Conference dates 26–29 September 2010
Proceedings title Chemeca: Australasian Conference on Chemical Engeering (2010)
Place of Publication Barton, ACT, Australia
Publisher Engineers Australia
Publication Year 2010
Sub-type Fully published paper
ISBN 9780858259713
0858259710
Start page 1
End page 11
Total pages 11
Collection year 2011
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 5. Utilizing a novel experimental system that combines cyclic voltammetry, Atomic Force Microscopy imaging and Raman spectroscopy, the formation of microscopic islands of elemental sulfur at low anodic potentials are detected. At higher anodic potentials a sulfur layer is formed. The formation of a hydrophobic sulfur layer at the galena surface explains the self induced floatability of this mineral.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Conference also known as Chemeca 2010. Physical Description: 1 usb : ill. (some col.) , maps.

Document type: Conference Paper
Collections: School of Chemical Engineering Publications
Official 2011 Collection
 
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Created: Mon, 07 Mar 2011, 11:31:11 EST by Mr Marc Hampton on behalf of School of Chemical Engineering