Preparation and characterization of hydroxyapatite from Achatina achatina snail shells: effect of carbonate substitution and trace elements on defluoridation of water
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Date
2018-07
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Asian Ceramic Societies
Abstract
A novel hydroxyapatite [HAp: Ca10 (PO4)6(OH)2] material for defluoridation was prepared from Achatina achatina (AA) snail shells using a modified chemical precipitation method. X-ray diffractometry and atomic absorption spectrometry revealed carbonate substitution as a function of stirring conditions. Stirring time was varied to control crystallite size and trace element concentrations. In addition, Infrared spectra, cyclic voltammograms, and ion exchange profiles confirmed the functional groups, the surface mass concentration and the fluoride removal efficiency, respectively. It was observed that the samples prepared after 1 hr optimal stirring times reduced fluoride concentration from to without affecting the overall pH conditions of the water, whereas beyond this time frame, low uptake of the fluoride ions was obtained with increasing pH conditions. It was also observed that crystallite size did not affect the removal capacity of the samples. The results demonstrated herein the possibility of using locally prepared AA shells for water purification and other environmental remediation applications.
Description
Keywords
Hydroxyapatite, Carbonates apatite substitution, Defluoridation and water purification
Citation
Bernard Owusu Asimeng, Joseph Richmond Fianko, Elsie Effah Kaufmann, Elvis Kwason Tiburu, Claude Fiifi Hayford, Prince Atsu Anani & Obed Korshie Dzikunu (2018) Preparation and characterization of hydroxyapatite from A chatinaachatina snail shells: effect of carbonate substitution and trace elements on defluoridation of water, Journal of Asian Ceramic Societies, 6:3, 205-212, DOI: 10.1080/21870764.2018.1488570