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Updated: Jun 7, 2026
Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications
Published on: February 23, 2017
Defluoridation behavior of nanostructured hydroxyapatite synthesized through an ultrasonic and microwave combined
Gérrard Eddy Jai Poinern1, Malay K Ghosh, Yan-Jing Ng
1Murdoch Applied Nanotechnology Research Group, School of Engineering and Energy, Murdoch University, South Street Perth Western Australia, WA 6150, Australia. g.poinern@murdoch.edu.au
Abstract:
The absorption performance of a nano-structured hydroxyapatite produced from a combined ultrasonic and microwave technique was examined for the removal of fluoride from contaminated water. The effect of physical and chemical parameters such as initial pH, contact time, initial fluoride concentration and temperature were investigated. The results indicated that the equilibrium adsorption data followed both the Langmuir and Freundlich isotherms, with a maximum monolayer adsorption capacity of 5.5mg/g at 298K. In addition, the kinetic studies have shown that the fluoride adsorption data followed a pseudo-second order model and that the intra-particle diffusion process played a significant role in determining the rate. The thermodynamic analysis also established that the adsorption process was endothermic and spontaneous. The initial and final fluoride loaded nano-hydroxyapatite samples were characterized using FESEM, TEM, XRD, FTIR and XPS methods. The analysis revealed that structural changes to the adsorbent had taken place.
