Sorption behavior of fluoride ions from aqueous solutions by hydroxyapatite

被引：125

作者：

Jimenez-Reyes, M. ^{[1
]}

Solache-Rios, M. ^{[1
]}

机构：

[1] Inst Nacl Invest Nucl, Dept Quim, Mexico City 11801, DF, Mexico

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 180卷 / 1-3期

关键词：

Fluoride; Sorption; Hydroxyapatite; DRINKING-WATER; REMOVAL; ADSORPTION; MAGNESIUM; CADMIUM; NICKEL; COBALT;

D O I：

10.1016/j.jhazmat.2010.04.030

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The effects of pH, contact time, fluoride-ion concentration, and the dose of sorbent on the sorption of fluoride ions by hydroxyapatite were studied. Equilibrium was reached in 16 h of contact time and the maximum sorption of fluoride ions was in the pH(eq) range between 5 and 7.3. The highest efficiency in the sorption system was determined by using 0.01 g of hydroxyapatite and 25 mL of solution. The pseudo-second order model described the kinetic sorption processes, and the Freundlich model, the sorption isotherm process. These results indicated that the mechanism was chemisorption on a heterogeneous material. Fluoride ions were partially desorbed using an alkaline solution. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：297 / 302

页数：6

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