Surface Chemical Characteristics and Adsorption Properties of Apatite

  • P. Somasundaran
  • Y. H. C. Wang


Interfacial behavior of apatites is governed to a large extent by their electrochemical properties which in turn are determined by pH, concentration of calcium, phosphate and fluoride. Adsorption of surfactants and polymers on apatite is dependent, among other factors, on the interfacial potential of the apatite. In this paper electrokinetic properties of synthetic hydroxyapatite and natural ore apatite containing fluoride are reported as a function of the pH, KNO3, Ca(NO3)2, K2HPO4 and KF and mechanisms governing the surface charge generation are reviewed. Electrokinetic effects obtained for apatite upon treatment with concentrated KF solutions and calcite supernatant are analyzed to determine possible chemical alterations of its surface. Adsorption properties of ionic surfactants and ionic and nonionic polymers on apatite at different pH values are also discussed.


Zeta Potential Isoelectric Point Synthetic Hydroxyapatite Total Phosphate Concentration Potential Determine 
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Copyright information

© Springer Science+Business Media New York 1984

Authors and Affiliations

  • P. Somasundaran
    • 1
  • Y. H. C. Wang
    • 1
  1. 1.School of Engineering and Applied ScienceColumbia UniversityNew YorkUSA

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