This chapter illustrates how the atomic force microscope (AFM) and particularly the colloid probe technique can be used to make measurements of single particle-bubble interactions and to summarize the current literature describing such experiments. The attachment of particles to bubbles in solution is of fundamental importance to several industrial processes most notably in froth flotation. Froth flotation is a significant industrial process, used primarily in the separation of mineral particles and also in the treatment of wastewater. The process of flotation involves the suspension of finely ground mineral particles in a chamber through which large volumes of air or another gas are bubbled. The effect of such particle properties as the degree of hydrophobicity is examined in relation to properties such as particle-bubble adhesion, the favorability of long-range interaction forces to particle-bubble attachment, as well as measured contact angles in a number of studies. Particle-bubble interactions, determination of particle-bubble separation, determination of contact angle from force-distance curves, effect of loading force on particle-bubble interactions, and effect of hydrodynamics on particle-bubble interactions are also discussed.
|Original language||English (US)|
|Title of host publication||Atomic Force Microscopy in Process Engineering|
|Subtitle of host publication||An Introduction to AFM for Improved Processes and Products|
|Number of pages||25|
|State||Published - Aug 20 2009|
ASJC Scopus subject areas
- Chemical Engineering(all)