Different Effects of Monovalent Anions and Cations on the Bubble Coalescence and Lifetime of Aqueous Films between Air Bubbles

Firouzi, Mahshid and Nguyen, Anh V. (2013). Different Effects of Monovalent Anions and Cations on the Bubble Coalescence and Lifetime of Aqueous Films between Air Bubbles. In: Chemeca 2013 : challenging tomorrow. CHEMECA, Brisbane, QLD Australia, (). 29 September - 2 October 2013.

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Name Description MIMEType Size Downloads
Author Firouzi, Mahshid
Nguyen, Anh V.
Title of paper Different Effects of Monovalent Anions and Cations on the Bubble Coalescence and Lifetime of Aqueous Films between Air Bubbles
Conference name CHEMECA
Conference location Brisbane, QLD Australia
Conference dates 29 September - 2 October 2013
Proceedings title Chemeca 2013 : challenging tomorrow
Place of Publication Barton, ACT Australia
Publisher Engineers Australia
Publication Year 2013
Sub-type Fully published paper
ISBN 9781922107077
Total pages 6
Language eng
Formatted Abstract/Summary
Ions of inorganic salts are known to affect bubble coalescence via the surface charge density as described by the classical DLVO theory of colloid stability. Our experimental results obtained for monovalent salts of different concentrations show different effects of monovalent anions (F-, Cl-, Br-and I-) and cations (Li+, Na+, K+and Cs+) on the lifetime of liquid films between two bubble surfaces. These results highlight the significant effects of ion radius and polarizability on the interaction of salt ions with water molecules in saline liquid films and at the air-water interface. They also show the important role of approach speed between the bubble surfaces. For each salt, there is a critical concentration beyond which the film lifetime rapidly increases and bubble coalescence is inhibited. These results are relevant to a number of chemical engineering processes taking place in saline water, including mineral separation by flotation using air bubbles in bore water
Keyword Saline water
Liquid film
Bubble coalescence
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: School of Chemical Engineering Publications
 
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Created: Fri, 31 Jul 2015, 09:14:28 EST by Mahshid Firouzi on behalf of School of Chemical Engineering