Fluoride sorption by nano-hydroxyapatite/chitin composite

被引：128
作者：
Sundaram, C. Sairam [2 ]
Viswanathan, Natrayasamy [1 ]
Meenakshi, S. [1 ]
机构：
[1] Gandhigram Rural Univ, Dept Chem, Gandhigram 624302, Tamil Nadu, India
[2] Karaikal Polytech Coll, Dept Sci & Humanities, Karaikal 609609, Puducherry, India
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 172卷 / 01期
关键词：
Hydroxyapatite; Chitin; Fluoride removal; Adsorption; Ion exchange; ADSORPTION; EQUILIBRIUM; DEFLUORIDATION; CHEMISTRY; KINETICS; CHITIN; WATER;
D O I：
10.1016/j.jhazmat.2009.06.152
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study the fluoride adsorption potential of novel nano-hydroxyapatite/chitin (n-HApCh) composite was explored. The sorbent was characterized using FTIR studies. The effects of pH, interfering anions and contact time were studied. The sorption data obtained under optimized conditions were subjected to Langmuir and Freundlich isotherms. Kinetic studies indicate that the rate of sorption of fluoride on n-HApCh composite follows pseudo-second-order and pore diffusion patterns. n-HApCh composite possesses higher defluoridation capacity (DC) of 2840 mgF(-) kg(-1) than nano-hydroxyapatite (n-HAp) which showed a DC of 1296 mgF(-) kg(-1). Field trials were conducted with the sample collected from a nearby fluoride endemic area. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：147 / 151
页数：5
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