Dynamic aspects of small bubble and hydrophilic solid encounters
Date
2011
Authors
Parkinson, L.
Ralston, J.
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Journal article
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Advances in Colloid and Interface Science, 2011; 168(42036):198-209
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Abstract
The capture of solid particles suspended in aqueous solution by rising gas bubbles involves hydrodynamic andphysicochemical processes that are central to colloid science. Of the collision, attachment and aggregatestability aspects to the bubble-particle interaction, the crucial attachment process is least understood. This isespecially true of hydrophilic solids. We review the current literature regarding each component of thebubble-particle attachment process, from the free-rise of a small, clean single bubble, to the collision, filmdrainage and interactions which dominate the attachment rate. There is a particular focus on recent studieswhich employ single, very small bubbles as analysis probes, enabling the dynamic bubble-hydrophilic particleinteraction to be investigated, avoiding complications which arise from fluid inertia, deformation of theliquid-vapour interface and the possibility of surfactant contamination.
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Copyright 2011 Crown Copyright