Advertisement

Mining, Metallurgy & Exploration

, Volume 36, Issue 1, pp 21–34 | Cite as

Effect of ζ-Potentials on Bubble-Particle Interactions

  • Kaiwu Huang
  • Roe-Hoan YoonEmail author
Article
  • 313 Downloads

Abstract

Derjaguin and Dukhin (1961) were the first to develop a model for bubble-particle interaction in flotation from first principles by considering the surface forces in wetting (or flotation) films. The model predicted that the energy barriers to bubble-particle attachment arise from the ζ-potentials of fine particles, which corroborates well with an earlier work of Fuerstenau (1957) reported for the flotation of quartz using dodecyl ammonium acetate (DAA) as collector. In the present work, a series of surface force measurements have been conducted by accurately monitoring the changes in bubble curvature during bubble-silica surface interactions. The curvature changes are then used to determine the capillary force, which is the sum of the hydrodynamic and surface forces. By subtracting the former that can also be determined from the curvature changes, one obtains the surface forces (or disjoining pressure). The results obtained as functions of pH and collector concentrations show that control of the ζ-potentials of bubbles relative to those of the silica surfaces is critical for maximizing the negative disjoining pressure, which is conducive to promoting bubble-particle attachment in flotation.

Keywords

ζ-potential Bubble-surface attachment Wetting films Surface forces Disjoining pressure Contact angle 

Notes

Acknowledgement

The authors would like to acknowledge Professor Peter Vikesland for allowing them to use the Malvern Zetasizer NanoZS.

Funding Information

This study was financially supported by the National Energy Technology Laboratory and US Department of Energy (DE-FE0029900).

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest.

References

  1. 1.
    Sutherland KL, Wark IW Principles of flotation. In, 1955. Australasian Institute of Mining and MetallurgyGoogle Scholar
  2. 2.
    Wark SI, Cox AB (1932) Principles of flotation: an experimental study of the effect of xanthates on contact angles at mineral surfaces. American Institute of Mining & Metallurgical EngineersGoogle Scholar
  3. 3.
    Derjaguin B (1940) Tiyra Kapillyarnoy Kondesatsii and Drugiz Kapillapnvix Yavlenii Uchetom Rasklinivayushchevo Daystviya Polimolekuyarnox Shidi Plenox. Zh Fiz Khim 14:137Google Scholar
  4. 4.
    Frumkin A (1938) On the wetting phenomena and attachment of bubbles. Zhur Fiz Khim (J Phys Chem) 12(4):337–345Google Scholar
  5. 5.
    Deryagin B, Kusakov M (1936) Properties of thin liquid layers. Izv AS USSR, series Chemistry:741–753Google Scholar
  6. 6.
    Pan L, Jung S, Yoon R-H (2011) Effect of hydrophobicity on the stability of the wetting films of water formed on gold surfaces. J Colloid Interface Sci 361(1):321–330CrossRefGoogle Scholar
  7. 7.
    Hogg R, Healy T, Fuerstenau D (1966) Mutual coagulation of colloidal dispersions. Trans Faraday Soc 62:1638–1651CrossRefGoogle Scholar
  8. 8.
    Derjaguin B, Dukhin S (1961) Theory of flotation of small and medium-size particles, Institution of Mining and Metallurgy. In: TGoogle Scholar
  9. 9.
    Fuerstenau D (1957) Correlation of contact angles, adsorption density, zeta potentials, and flotation rate. Trans AIME 208:1365–1367Google Scholar
  10. 10.
    Israelachvili JN (2011) Intermolecular and surface forces: revised, 3rd edn. Academic pressGoogle Scholar
  11. 11.
    Sheludko A (1962) Certain peculiarities of foam lamellas, Parts I–III. In: Proc. Koninkl. Ned. Akad. Wetenschap. B, pp 76–108Google Scholar
  12. 12.
    Pan L, Yoon R-H (2016) Measurement of hydrophobic forces in thin liquid films of water between bubbles and xanthate-treated gold surfaces. Miner Eng 98:240–250CrossRefGoogle Scholar
  13. 13.
    Pan L, Yoon R-H (2018) Effects of electrolytes on the stability of wetting films: implications on seawater flotation. Miner Eng 122:1–9CrossRefGoogle Scholar
  14. 14.
    Yoon R-H, Yordan JL (1986) Zeta-potential measurements on microbubbles generated using various surfactants. J Colloid Interface Sci 113(2):430–438CrossRefGoogle Scholar
  15. 15.
    Finch J, Smith G (1973) Dynamic surface tension of alkaline dodecylamine solutions. J Colloid Interface Sci 45(1):81–91CrossRefGoogle Scholar
  16. 16.
    Churaev N (1995) Contact angles and surface forces. Adv Colloid Interf Sci 58(2-3):87–118CrossRefGoogle Scholar
  17. 17.
    Somasundaran P, Ananthapadmanabhan KP (1979) Solution chemistry of surfactants and the role of it in adsorption and froth flotation in mineral-water systems. Solution chemistry of surfactants 2:777CrossRefGoogle Scholar
  18. 18.
    Laskowski J, Kitchener J (1969) The hydrophilic—hydrophobic transition on silica. J Colloid Interface Sci 29(4):670–679CrossRefGoogle Scholar
  19. 19.
    Deryagin B, Churaev N (1987) Structure of water in thin layers. Langmuir 3(5):607–612CrossRefGoogle Scholar
  20. 20.
    Parks GA (1968) Aqueous surface chemistry of oxides and complex oxide mineralsGoogle Scholar
  21. 21.
    Yoon RH, Salman T, Donnay G (1979) Predicting points of zero charge of oxides and hydroxides. J Colloid Interface Sci 70(3):483–493CrossRefGoogle Scholar
  22. 22.
    Rutland M, Waltermo A, Claesson P (1992) pH-dependent interactions of mica surfaces in aqueous dodecylammonium/dodecylamine solutions. Langmuir 8(1):176–183CrossRefGoogle Scholar
  23. 23.
    Pan L (2013) Surface and hydrodynamic forces in wetting films. Virginia TechGoogle Scholar
  24. 24.
    Yoon RH, Soni G, Huang K, Park S, Pan L (2016) Development of a turbulent flotation model from first principles and its validation. Int J Miner Process 156:43–51CrossRefGoogle Scholar

Copyright information

© The Society for Mining, Metallurgy & Exploration 2019

Authors and Affiliations

  1. 1.Department of Mining and Minerals EngineeringVirginia TechBlacksburgUSA

Personalised recommendations