Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 20, Issue 6, Pages 4014-4021Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2013.12.105
Keywords
Adsorption; Bone char; Fluoride; Hydroxyapatite; Water pollution
Funding
- Fondo de Apoyo a la Investigacion (FAI), UASLP [C12-FAI-03-55.55]
- federal program PROMEP [PROMEP/103.5/12/3953]
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The adsorption of fluoride from water on bone char (BC) was investigated in this work, and the fluoride adsorption capacity of BC was compared to that of hydroxyapatite (HAP). The adsorption capacity of BC and HAP drastically increased while decreasing the pH from 7.0 to 5.0. Furthermore, the fluoride adsorption on BC was due to its HAP content and was not considerably affected by the presence of the anions Cl-, HCO3-, CO32-, SO42-, NO3- and NO2-. The mechanism of fluoride adsorption on BC was attributed to electrostatic interactions between surface charge of BC and fluoride ions in solution. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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