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Preparation of high specific surface area hydroxyapatite for environmental applications

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Abstract

We report the preparation of hydroxyapatite in powdered form by aqueous reaction of calcium nitrate or hydroxide with phosphate ion at room temperature. With a slow maturation step of 48 h avoiding heat, the resulting products show large specific surface areas above 150 m2/g. The specific surface areas also depend on stirring speed with a maximum observed with gentle mixing. Ageing causes a decrease in specific surface area which tends to stabilize near 100 m2/g following a 1 year period. The hydroxyapatite may be spray dried and conserve interesting physical properties for environmental applications.

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Acknowledegments

We gratefully acknowledge help from Solvay HSE (Belgium) in the form of a research stipend. Our gratitude goes to ADEME (French Environment Agency) for funding this research under the grant No 02-74-111.

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Authors and Affiliations

  1. Centre RAPSODEE, UMR CNRS 2392, Ecole des Mines d’Albi, Campus Jarlard, 81000, Albi, France

    Cedric Verwilghen, Sebastien Rio & Ange Nzihou

  2. PROMES CNRS Odeillo, 66125, Font Romeu, France

    Daniel Gauthier & Gilles Flamant

  3. LCBM, Chemistry Department, Paul Sabatier University, Avenue G. Pompidou, B.P. 258, 81104, Castres, France

    Patrick Joel Sharrock

Authors
  1. Cedric Verwilghen
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  2. Sebastien Rio
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  3. Ange Nzihou
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  4. Daniel Gauthier
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  5. Gilles Flamant
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  6. Patrick Joel Sharrock
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Correspondence to Patrick Joel Sharrock.

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Verwilghen, C., Rio, S., Nzihou, A. et al. Preparation of high specific surface area hydroxyapatite for environmental applications. J Mater Sci 42, 6062–6066 (2007). https://doi.org/10.1007/s10853-006-1160-y

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  • DOI: https://doi.org/10.1007/s10853-006-1160-y

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