𝔖 Bobbio Scriptorium
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Direct measurements of particle–bubble interactions

✍ Scribed by Graeme Gillies; Michael Kappl; Hans-Jürgen Butt

Book ID
104011699
Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
147 KB
Volume
114-115
Category
Article
ISSN
0001-8686

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✦ Synopsis

The essence of mineral flotation is the formation of strong particle-bubble aggregates. Hydrodynamics and DLVO forces hinder the particle-bubble approach, however the presence of a hydrophobic surface results in hydrophobic attraction and strong aggregate formation. In this article we review literature where the colloid probe technique has been used to investigate flotation, primarily particle-bubble interactions in aqueous solution. In some instance particles-bubble interactions have used to quantify the hydrophobic force, whilst hydrophobic forces are crucial for particle-bubble attachment, studies of hydrophobic forces are not the main focus of this article.

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The attachment of particles to bubbles in solution is of fundamental importance to several industrial processes, most notably in the process of froth flotation. During this process hydrophobic particles attach to air bubbles in solution, which allows them to be separated as froth at the surface. The