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A fundamental study of bubble-particle interactions through zeta-potential distribution analysis Open Access


Other title
Bubble-particle interactions
Submicron size bubble generation
In situ gas nucleation
Hydrodynamic cavitation
Zeta-potential distribution
Type of item
Degree grantor
University of Alberta
Author or creator
Wu, Chendi
Supervisor and department
Xu, Zhenghe (Chemical and Materials Engineering)
Examining committee member and department
Szymanski, Jozef (Civil and Environmental Engineering)
Xu, Zhenghe (Chemical and Materials Engineering)
Liu, Qingxia (Chemical and Materials Engineering)
Department of Chemical and Materials Engineering

Date accepted
Graduation date
Master of Science
Degree level
Understanding the mechanism of bubble-particle interactions plays a critical role in advancing flotation technology. In this study, submicron size bubbles with an average diameter less than 1 μm and a life time of at least several hours were generated using a novel hydrodynamic cavitation method. Effect of mechanical force and water chemistry on generation and stability of submicron size bubbles is investigated. With recent development in measuring zeta potential distributions of colloidal systems, interactions of bubbles and fine solid particles in various electrolyte, surfactant and frother solutions as well as in industrial process water were studied using the stable submicron size bubbles generated by hydrodynamic cavitation. The outcome of this study provides not only a better understanding of bubble-particle attachment mechanism and its role in flotation, but also a direct evidence of armour-coating of bubbles and enhanced bubble-particle interactions by in situ gas nucleation.
License granted by Chendi Wu ( on 2011-04-05T16:33:19Z (GMT): 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 the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein 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.
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