Chen-wei Li, Dan-long Li, Xin Li, Ming Xu, and Hai-jun Zhang, Surface nanobubbles on hydrophobic surface and its implication to flotation, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2279-1
Cite this article as:
Chen-wei Li, Dan-long Li, Xin Li, Ming Xu, and Hai-jun Zhang, Surface nanobubbles on hydrophobic surface and its implication to flotation, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2279-1
Research Article

Surface nanobubbles on hydrophobic surface and its implication to flotation

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  • Received: 19 November 2020Revised: 3 March 2021Accepted: 4 March 2021Available online: 5 March 2021
  • Nanobubbles play a potential role in the application of fine particles flotation. In this work, the identification of nanoentities was identified with contact mode atomic force microscope (AFM). Meanwhile, the influence of setpoint ratio and amplitude of cantilever and the responses of the formed surface nanobubbles to the fluctuations of pH, salt concentrations, and surfactant concentrations in the slurry, were studied respectively. Nanobubbles were found on highly oriented pyrolytic graphite (HOPG) surface as HOPG was immersed in deionized water in the ambient temperature. The coalescence of nanobubbles occurred under contact mode, which provides strong evidence supporting the gaseous nature of these nanostructures on HOPG. The measuring height of surface nanobubbles decreased with the setpoint ratio (Asetpoint/Afree). The change in concentrations of pH and MIBC shows a negligible influence on lateral size and height of the preexisting surface nanobubbles. The addition of LiCl results in a negligible change in lateral size but an obvious change in height of surface nanobubbles. The present results are expected to provide a valuable reference to understand the properties of surface nanobubbles and design nanobubbles-assisted flotation processes.
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