Hydrophobicity and Contact Angle

  • S. Ramachandra Rao


Flotation is based on attachment of the mineral particle to an air bubble. As mineral particles are suspended in water the air bubble has to displace water from the surface of the mineral and make an effective contact, which occurs when the mineral surface is or lias been made hydrophobic to an appreciable degree. A measure of hydrophobicity of the mineral particle is the extent to which the air bubble displaces water for the solid surface. This can be understood from an analysis of thermodynamic aspects of the bubble-mineral contact.


Surface Tension Contact Angle Interfacial Tension Surface Free Energy Sulfide Mineral 
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8.10. Selected Readings

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Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • S. Ramachandra Rao
    • 1
  1. 1.McGill UniversityMontrealCanada

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