Interaction of calcium dioleate collector colloids with calcite and fluorite surfaces as revealed by AFM force measurements and molecular dynamics simulation

Fa, K., Nguyen, A. V. and Miller, J. D. (2005). Interaction of calcium dioleate collector colloids with calcite and fluorite surfaces as revealed by AFM force measurements and molecular dynamics simulation. In: Graeme J. Jameson, Conference Proceedings: Centenary of Flotation Symposium. Centenary of Flotation Symposium, Brisbane, Australia, (). 6-9 June 2005.


Author Fa, K.
Nguyen, A. V.
Miller, J. D.
Title of paper Interaction of calcium dioleate collector colloids with calcite and fluorite surfaces as revealed by AFM force measurements and molecular dynamics simulation
Conference Paper Type Fully Published Paper
Conference name Centenary of Flotation Symposium
Conference location Brisbane, Australia
Conference dates 6-9 June 2005
Proceedings title Conference Proceedings: Centenary of Flotation Symposium
Editor Graeme J. Jameson
Place published Carlton South, Australia
Publisher Australasian Institute of Mining and Metallurgy (AusIMM)
Publication date 2005
ISBN 9781920806316; 1920806318
Language eng
Abstract/Summary Spherical calcium dioleate particles (~10 µm in diameter) were used as AFM (atomic force microscope) probes to measure interaction forces of the collector colloid with calcite and fluorite surfaces. The attractive AFM force between the calcium dioleate sphere and the fluorite surface is strong and has longer range than DLVO (Derjaguin-Landau-Verwey-Overbeek) prediction. The repulsive AFM force between the calcium dioleate sphere and the fluorite surface does not agree with the DLVO prediction. Consideration of non-DLVO forces, including the attractive hydrophobic force and the repulsive hydration force, was necessary to explain the experimental results. The non-DLVO interactions considered were justified by the different interfacial water structures at fluorite- and calcite-water interfaces as revealed by the numerical computation experiments using molecular dynamics simulation.
Subjects 0914 Resources Engineering and Extractive Metallurgy
091404 Mineral Processing/Beneficiation
Keyword Spherical calcium dioleate
atomic force microscope
collector colloid
calcite
fluorite
surfaces
DLVO
Derjaguin-Landau-Verwey-Overbeek
repulsive AFM force
References particles (~10 µm in diameter) were used as AFM ( ) probes to measure interaction forces of the with and . The attractive AFM force between the calcium dioleate sphere and the fluorite surface is strong and has longer range than ( ) prediction. The between the calcium dioleate sphere and the fluorite surface does not agree with the DLVO prediction. Consideration of non-DLVO forces, including the attractive hydrophobic force and the repulsive hydration force, was necessary to explain the experimental results. The non-DLVO interactions considered were justified by the different interfacial water structures at fluorite- and calcite-water interfaces as revealed by the numerical computation experiments using molecular dynamics simulation.
Q-Index Code EX
Additional Notes Publication series (Australasian Institute of Mining and Metallurgy) ; 2005/5. -- Selected papers published in Minerals Engineering Volume 19, Issues 6-8, 2006

Document type: Conference Paper
Sub-type: Fully Published Paper
Collections: Julius Kruttschnitt Mineral Research Centre Publications
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Created: Thu, 04 Mar 2010, 12:43:02 EST by Maria Campbell on behalf of Sustainable Minerals Institute