Quantification of particle-bubble interactions using atomic force microscopy

Nidal Hilal, Daniel Johnson

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

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. © 2009

Original languageEnglish (US)
Title of host publicationAtomic Force Microscopy in Process Engineering
PublisherElsevier Ltd
Pages81-105
Number of pages25
ISBN (Print)9781856175173
DOIs
StatePublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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