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Study on the fluoride adsorption of various apatite materials in aqueous solution
Citation
Gao, S and Cui, J and Wei, Z, Study on the fluoride adsorption of various apatite materials in aqueous solution, Journal of Fluorine Chemistry, 130, (11) pp. 1035-1041. ISSN 0022-1139 (2009) [Refereed Article]
Copyright Statement
Copyright 2009 Elsevier B.V.
Official URL: http://dx.doi.org/doi:10.1016/j.jfluchem.200...
DOI: doi:10.1016/j.jfluchem.2009.09.004
Abstract
The aim of this study was to evaluate the defluoridation efficiencies of various sorbents in aqueous solution. These sorbents include synthetic nano-hydroxyapatite (n-HAp), biogenic apatite (bone meal), treated biogenic apatite (bone meal prepared by H2O2 oxidation) and geogenic apatite (rock phosphate), which were characterized by XRD, FTIR, TEM and SEM. It has been observed that the defluoridation capacities follow the order: n-HAp > BH2O2 > B > rock phosphate. The controlling factors, sorbent dose, initial fluoride concentration, pH, contact time and temperature were investigated. The defluoridation capacities increased with the increase in the initial fluoride concentration and contact time, decreased with the increase in the sorbent dose. The optimum pH range for removal of fluoride on various apatite sorbents was considered to be 5.0–6.0. The fluoride adsorption can be explained by Langmuir, Freundlich isotherms, and the adsorption kinetic data follow the pseudo-second-order model. Thermodynamic parameters such as ΔH0, ΔS0 and ΔG0 indicated that the adsorption on various apatite sorbents was spontaneous and endothermic. These results showed that bone meal is a promising material for fluoride adsorption.
Item Details
Item Type: | Refereed Article |
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Keywords: | adsorption, apatite, n-HAp, bone meal, defluoridation capacity |
Research Division: | Chemical Sciences |
Research Group: | Analytical chemistry |
Research Field: | Separation science |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the chemical sciences |
UTAS Author: | Wei, Z (Professor Zhenggui Wei) |
ID Code: | 91142 |
Year Published: | 2009 |
Web of Science® Times Cited: | 100 |
Deposited By: | Austn Centre for Research in Separation Science |
Deposited On: | 2014-05-09 |
Last Modified: | 2014-06-12 |
Downloads: | 0 |
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