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Colloid and Polymer Science

, Volume 272, Issue 1, pp 82–98 | Cite as

Adsorption of oleic acid and triolein onto various minerals and surface treated minerals

  • K. R. Rogan
Original Contributions

Abstract

A systematic investigation of the adsorption of oleic acid was under-taken with various minerals and surface treated minerals, viz., kaolinite, treated kaolinites, montmorillonites, talcs, gibbsites, calcites and a treated calcite. Adsorption onto kaolinite, two of the treated kaolinites (amine and MgSiO3 treated), talcs and gibbsites was well correlated by the Langmuir model, while adsorption on the treated calcite was well correlated by the Freundlich model. Adsorption on a cationic polymer-treated kaolinite was explained in terms of a cooperative mechanism. Adsorption onto montmorillonites was explained in terms of a penetrative mechanism involving exchangeable cations.

Oleic acid adsorption was compared with triolein adsorption on one of the montmorillonites, two adsorbents produced by the surface treatment of this montmorillonite, and one of the talcs. The triolein adsorption of the montmorillonite was considerably less than its oleic acid adsorption, and was explained in terms of a cooperative mechanism. Triolein adsorption of the treated montmorillonites, and the talc was well correlated by the Langmuir model. Larger amounts of triolein were taken up by the treated montmorillonites than by the untreated montmorillonite. The triolein adsorption of the talc was greater than its oleic acid adsorption.

Key words

Adsorption oleic acid triolein minerals pitch 

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Copyright information

© Steinkopff-Verlag 1994

Authors and Affiliations

  • K. R. Rogan
    • 1
  1. 1.Research DepartmentECC InternationalCornwallUK

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