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Elimination of fluoride ions in water for human consumption using hydroxyapatite as an adsorbent

  • V. E. Badillo-Almaraz
  • J. Armando Flores
  • H. Arriola
  • F. A. López
  • L. Ruiz-Ramirez
Article

Abstract

In this work, a synthetic hydroxyapatite, Bio-gel HTP, marketed by BIO-RAD®, has been studied in order to propose a method to remove the excess fluoride present in drinking water. The removal of fluoride ions by this adsorbent has been studied as a function of solution pH, and fluoride ion concentration. Experiments of fluoride ions sorption have been carried out with the use of 18F radiotracer in solutions of NaF at several concentrations with an ion selective electrode used for fluoride analysis. The adsorption isotherms show that the best fluoride adsorption on hydroxyapatite occurs at a pH range of 7.0–7.5. At this pH value the solid presents an important capacity of subtraction of fluoride, of around of 100 mmol/100 g.

Keywords

Fluoride Hydroxyapatite Fluoride Concentration Dental Fluorosis Fluoride Removal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akadémiai Kiadó 2007

Authors and Affiliations

  • V. E. Badillo-Almaraz
    • 1
  • J. Armando Flores
    • 1
  • H. Arriola
    • 2
  • F. A. López
    • 3
  • L. Ruiz-Ramirez
    • 3
  1. 1.Unidad Académica de Estudios Nucleares/Universidad Autónoma de ZacatecasZacatecas, ZacatecasMéxico
  2. 2.Facultad de QuímicaUniversidad National Autónoma de MéxicoMéxicoMéxico
  3. 3.Facultad de MedicinaUniversidad National Autónoma de México / PET-CiclotrónMéxicoMéxico

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