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Sorption of uranium and other heavy metals on hydroxyapatite

The immobilization of U^VI and Pb^II from aqueous solutions in a solid phase by interaction with calcium hydroxyapatite has been studied in batch experiments with increasing contact times. The results were compared with those previously found for Cd^II. All these elements are able to be efficiently immobilized by such a method. The sorbed quantities vary in the order Pb>U>Cd. The sorption mechanisms are element dependent. The dominant mechanisms are: dissolutionprecipitation with formation of an amorphous or microcrystalline phase for U, dissolution-precipitation with the formation of two new crystalline phases and with possible incorporation into the initial apatite for Pb, and intracrystalline diffusion and exchange for Cd.

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1. Centre National de la Recherche Scientifique, Centre d'Etudes de Chimie Métallurgique, 15 rue Georges Urbain, 94407, Vitry-sur-Seine, France

   J. Jeanjean, J. C. Rouchaud, L. Tran & M. Fedoroff

1. J. Jeanjean
2. J. C. Rouchaud
3. L. Tran
4. M. Fedoroff

Jeanjean, J., Rouchaud, J.C., Tran, L. et al. Sorption of uranium and other heavy metals on hydroxyapatite. Journal of Radioanalytical and Nuclear Chemistry Letters 201, 529–539 (1995). https://doi.org/10.1007/BF02162730

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• Received: 21 September 1995

• Accepted: 04 October 1995

• Issue Date: December 1995

• DOI: https://doi.org/10.1007/BF02162730

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