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Article Dans Une Revue Applied Microbiology and Biotechnology Année : 2000

Factors influencing the biosorption of gadolinium by micro-organisms and its mobilisation from sand.

Yves Andres
Gerald Thouand
M Mergeay
  • Fonction : Auteur

Résumé

The present work was devoted to the study of the biosorption capacities of various microbial species (Bacillus subtilis, Pseudomonas aeruginosa, Ralstonia metallidurans CH34 previously Alcaligenes eutrophus CH34, Mycobacterium smegmatis, Saccharomyces cerevisiae) for ions of the lanthanide gadolinium (Gd3+). The uptake by sand of this element was also measured. Saturation curves and Scatchard models were established for all biosorbants used in this work. The results enabled us to determine the binding affinities and the maximum capacities for biosorption of Gd3+, which ranged from 350 micromol g(-1) for B. subtilis to 5.1 micromol g(-1) for S. cerevisiae. This study demonstrated the usefulness of optimisation of experimental conditions in biosorption investigations. Experimental results showed that biosorption could be influenced by the growth stage and by the composition of the growth medium of microbial cells. Finally, particular attention was given to the transfer of gadolinium ions from a loaded sand to a bacterial suspension.

Dates et versions

hal-00881433 , version 1 (08-11-2013)

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Citer

Yves Andres, Gerald Thouand, M Boualam, M Mergeay. Factors influencing the biosorption of gadolinium by micro-organisms and its mobilisation from sand.. Applied Microbiology and Biotechnology, 2000, 54 (2), pp.262-7. ⟨10.1007/s002530000368⟩. ⟨hal-00881433⟩
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