Retention of fluoride ions from aqueous solution using porous hydroxyapatite: Structure and conduction properties

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• 作者：Hammari ; L.E.L. ; Laghzizil ; A. ; Barboux ; P. ; Lahlil ; K. ; Saoiabi ; A.
• 关键词：Hydroxyapatites ; Fluoride ; Retention ; Crystallization ; Ionic conductivity
• 刊名：Journal of Hazardous Materials
• 出版年：2004
• 期刊代码：50_03043894
• 类别：ce
• 出版时间：October 18, 2004
• 卷：114
• 期：1-3
• 页码：41-44
• 文件大小：84.7 K

摘要

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 1mol/L [F⁻] solution compared with 30%for crystalline hydroxyapatite (c-HAp). The high specific surface area of p-HAp (235m²g⁻¹) compared with c-HAp sample (47m²g⁻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.