The detachment of particles from coalescing bubble pairs

Title: The detachment of particles from coalescing bubble pairs
Creator: Ata, Seher
Relation: Journal of Colloid and Interface Science Vol. 338, Issue 2, p. 558-565
Publisher Link: http://dx.doi.org/10.1016/j.jcis.2009.07.003
Publisher: Elsevier
Resource Type: journal article
Date: 2009
Description: This paper is concerned with the detachment of particles from coalescing bubble pairs. Two bubbles were generated at adjacent capillaries and coated with hydrophobic glass particles of mean diameter 66 μm. The bubbles were then positioned next to each other until the thin liquid film between them ruptured. The particles that dropped from the bubble surface during the coalescence process were collected and measured. The coalescence process was very vigorous and observations showed that particles detached from the bubble surfaces as a result of the oscillations caused by coalescence. The attached particles themselves and, to some extent the presence of the surfactant had a damping affect on the bubble oscillation, which played a decisive role on the particle detachment phenomena. The behaviour of particles on the surfaces of the bubbles during coalescence was described, and implications of results for the flotation process were discussed.
Subject: froth flotation; froth; bubble coalescence; particle detachment; bubble oscillation
Identifier: uon:8044
Identifier: http://hdl.handle.net/1959.13/916604
Identifier: ISSN:0021-9797
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