文献类型：期刊文献

英文题名：Fluoride removal performance of glass derived hydroxyapatite

作者：Liang, Wen[1];Zhan, Lei[1];Piao, Longhua[1];Russel, Christian[2]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Res Inst Biomat, Shanghai 200237, Peoples R China;[2]Univ Jena, Otto Schott Inst, Jena, Germany

年份：2011

卷号：46

期号：2

起止页码：205

外文期刊名：MATERIALS RESEARCH BULLETIN

收录：;EI(收录号：20110313587060);WOS:【SCI-EXPANDED(收录号:WOS:000287276600010)】；

基金：The authors gratefully acknowledge the financial support of National Nature Science Foundation of China (Project for Young Scientists Fund No. 50902048). The authors wish to acknowledge the valuable discussion with Prof. D E Day in the Materials Research Center, University of Missouri-Rolla, from who got the idea of using glass derived hydroxyapatite in wastewater treatment.

语种：英文

外文关键词：Glasses; X-ray diffraction; Surface properties

摘要：A novel sodium calcium borate glass derived hydroxyapatite (G-HAP) with different ranges of particle size was prepared by immersion sodium calcium borate glass in 0.1 M K2HPO4 solution by the ratio of 50 g L-1 for 7 days. The unique advantage of C-HAP for the adsorption of fluoride ions in solutions was studied. The effects of size and quantity of particles, pH value and adsorption time on adsorption performance were investigated. The maximum adsorption capacity was 17.34 mg g(-1) if 5 g L-1 <100 mu m G-HAP was added to a solution with an initial pH value of 6.72 and the adsorption time was 12 h. The results showed that the micro-G-HAP could immobilize F- in solution more effectively than commercial nano-HAP, which makes potential application of the C-HAP in removing the fluoride ions from wastewater. The adsorption kinetics and isotherms for F- could be well fitted by a second order kinetic model and Freundlich isotherm model respectively, which could be used to describe the adsorption behavior. The mechanism of G-HAP in immobilizing F- from aqueous solutions was investigated by the X-ray diffraction (XRD), infrared spectra (IR) and scanning electron microscopy (SEM). (C) 2010 Elsevier Ltd. All rights reserved.