Hammari LEL, Laghzizil A, Barboux P, Lahlil K, Saoiabi A. Retention of fluoride ions from aqueous solution using porous hydroxyapatite. Structure and conduction properties.
J Hazard Mater 2004;
114:41-44. [PMID:
15511572 DOI:
10.1016/j.jhazmat.2004.06.032]
[Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2003] [Revised: 03/29/2004] [Accepted: 06/21/2004] [Indexed: 05/24/2023]
Abstract
Synthetic porous calcium hydroxyapatite (noted p-HAp) treated with different fluoride concentrations at room temperature in the presence of carbonate, sodium chloride and phosphate-rich media was investigated. The fluoridation rate of the porous calcium hydroxyapatite was 89% using 1 mol/L [F(-)] solution compared with 30% for crystalline hydroxyapatite (c-HAp). The high specific surface area of p-HAp (235 m(2)g(-1)) compared with c-HAp sample (47 m(2)g(-1)) has an important effect on the removal of fluoride ions from aqueous solution, when p-HAp was treated with high fluoride concentration to produce calcium fluorohydroxyapatite materials. Fluoride adsorption on porous hydroxyapatites (p-HAp) modified their structural and conduction properties.
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