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Understanding zinc sulfide activation mechanism and impact of calcium sulfate in sphalerite flotation Open Access


Other title
Surface adsorption
Sphalerite flotation
Zinc sulfide activation
Type of item
Degree grantor
University of Alberta
Author or creator
Teng, Fucheng
Supervisor and department
Liu, Qingxia (Chemical and Materials Engineering)
Zeng, Hongbo (Chemical and Materials Engineering)
Examining committee member and department
Liu, Qingxia (Chemical and Materials Engineering)
Zeng, Hongbo (Chemical and Materials Engineering)
Zhang, Hao (Chemical and Materials Engineering)
Szymanski, Jozef (Civil and Environmental Engineering)
Department of Chemical and Materials Engineering
Chemical Engineering
Date accepted
Graduation date
Master of Science
Degree level
Quartz crystal microbalance with dissipation (QCM-D) was used to study the zinc sulfide activation with silver, copper and lead. The interactions between calcium sulfate and minerals and gypsum nucleation on functional surfaces were investigated using a QCM-D, surface forces apparatus (SFA), and atomic force microscope (AFM). This study is the first of its kind to apply the QCM-D technique to investigate sphalerite activation, which indroduces a new in-situ approach to investigate surface adsorption and activation in many mineral processes and surface modifications. The fitting of adsorption of copper and lead species to sphalerite at pH 6.5 and 9 with kinetic models indicates that the activation in this pH range is a chemisorption process. Gypsum was found to grow on functional surfaces following the growth rates as -COOH>-OH>-CH3, but not on sphalerite. The uptake of copper and adsorption of xanthate on sphalerite could be retarded in the presence of calcium sulfate.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
F. Teng, Q. Liu, H. Zeng, In situ kinetic study of zinc sulfide activation using a quartz crystal microbalance with dissipation (QCM-D), Journal of Colloid and Interface Science, 2011 (in press)F. Teng, H. Zeng, Q. Liu, Understanding the Deposition and Surface Interactions of Gypsum, Journal of Physical Chemistry C, 115 (2011) 17485-17494

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File title: 1.1 Sphalerite flotation
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