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Removal of Solid Organic Films from Rotating Disks Using Emulsion Cleaners.

Kabin1, Withers, Grant

  • 1Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina, 27695-7905

Journal of Colloid and Interface Science
|August 5, 2000
PubMed
Summary
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Phenanthrene film removal from surfaces is primarily achieved by solid detachment, not dissolution. Emulsions containing d-limonene and Tween 20 facilitate this process by penetrating the film and reducing adhesion.

Area of Science:

  • Physical Chemistry
  • Surface Science
  • Colloid and Surface Chemistry

Background:

  • Solid organic films pose challenges in removal processes.
  • Understanding removal mechanisms is crucial for industrial applications.

Purpose of the Study:

  • To investigate the removal rate and mechanism of a solid phenanthrene film from a rotating disk surface.
  • To analyze the role of emulsions containing water, Tween 20, and d-limonene in film removal.

Main Methods:

  • Measurements of phenanthrene removal rates using rotating disk experiments.
  • Analysis of initial solubilization rates using two distinct mass transfer models.
  • Modeling the emulsion as both homogeneous and considering finite droplet size.

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Main Results:

  • Phenanthrene removal is dominated by solid film detachment (approximately 90%).
  • Initial removal involves phenanthrene uptake into emulsion drops and organic phase penetration.
  • The organic phase (d-limonene) diminishes the adhesive force, leading to detachment.

Conclusions:

  • Solid detachment is the primary mechanism for phenanthrene film removal.
  • Emulsion properties and organic phase flux significantly influence removal efficiency and detachment time.
  • Mass transfer models provide insights into the solubilization and removal dynamics.