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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Infrared, Raman and NMR investigations of risedronate adsorption on nanocrystalline apatites
Journal of Colloid and Interface Science, Volume 420, Year 2014
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Description
The aim of the current work was to study the physico-chemical interactions of a bisphosphonate molecule, risedronate, with a well-characterised synthetic nanocrystalline apatite (NCA) as a model bone mineral. We adopted a global approach, using complementary physico-chemical techniques such as FTIR, RAMAN and NMR spectroscopies in order to learn more about the interaction process of risedronate with the apatitic surface. The results obtained suggest that risedronate adsorption corresponds to an ion substitution reaction with phosphate ions occurring at the crystal surface. This mechanism explains the greater amount adsorbed (N) for NCA, compared to well crystallised stoichiometric hydroxyapatite, attributable to the well-developed hydrated layer at the surface of the nanocrystals. However, most calcium ions remain attached to the solid phase and the formation of insoluble risedronate calcium salts must also be considered as a competitive reaction to the adsorption. Thus a calcium risedronate salt was synthesised and fully characterised for comparison to the solids after adsorption. Following spectroscopic results, it can be concluded that a strong interaction was established between risedronate ions and calcium ions at the apatitic surface. However, under these experimental conditions there is no nucleation of a distinct calcium risedronate salt and the apatite crystals retain their integrity. © 2014 Elsevier Inc.
Authors & Co-Authors
Errassifi, F.
France, Toulouse
Institut National Polytechnique de Toulouse
Morocco, Marakech
Faculté Des Sciences Semlalia
Sarda, S.
France, Toulouse
Institut National Polytechnique de Toulouse
Barroug, Allal
Morocco, Marakech
Faculté Des Sciences Semlalia
Legrouri, Ahmed
Morocco, Ifrane
Al Akhawayn University
Sfihi, Hocine
France, Paris
Laboratoire de Physique et D'étude Des Matériaux
Rey, Christian C.
France, Toulouse
Toulouse Inp-ensiacet
Statistics
Citations: 6
Authors: 6
Affiliations: 5
Identifiers
Doi:
10.1016/j.jcis.2014.01.017
ISSN:
00219797
e-ISSN:
10957103