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Thermodynamics of Adsorption of a Hydrophobic Polymeric Flocculant on Coal, Pyrite and Shale Minerals

  • S. Yu
  • Y. A. Attia

Abstract

A study was performed on the adsorption of a hydrophobic polymer, FR-7A, on individual suspensions of coal, pyrite and shale minerals. A nephelometric method was employed for the determining FR-7A concentration in solutions. From the adsorption isotherms, thermodynamic derivations of ΔG ads 0 , ΔG el 0 , ΔGH, ΔH ads 0 and ΔS ads 0 were made. The study led to a number of findings: 1) adsorption of FR-7A on the minerals followed the Langmuir adsorption model; 2) FR-7A had a higher adsorption affinity to coal than to pyrite or to shale minerals; the higher affinity to coal could be attributed to “hydrophobic bonding”; 3) adsorption affinity of FR-7A on all minerals decreased as pH increased.

Keywords

Adsorption Isotherm Polymer Adsorption Gibbs Free Energy Change Adsorption Density Coal Slurry 
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Copyright information

© Elsevier Science Publishing Co., Inc. 1990

Authors and Affiliations

  • S. Yu
    • 1
  • Y. A. Attia
    • 1
  1. 1.Dept. of Materials Science and EngineeringThe Ohio State UniversityColumbusUSA

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