Influence of organic matters on the bacterial AsIII oxidation in polluted soils

Tiffanie Lescure 1, 2, 3 Fabienne Battaglia-Brunet 1, 3 Catherine Joulian 1 Catherine Hénault 4 Pascale Bauda 2
1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 LIEC - Laboratoire Interdisciplinaire des Environnements Continentaux
3 ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327
4 MSE - Microbiologie du Sol et de l'Environnement
Abstract : The global bacterial AsIII-oxidizing activity tends to decrease As toxicity in soils and its transfer toward underlying aquifers. The influence of different types of organic matters on arsenic speciation by pure strains and soils microflora was determined. Experimental results show that the presence of organic matter has a negative effect on the specific rate of AsIII oxidation by pure strains presenting different metabolisms. In parallel, experiments are performed with various soils from different types of polluted sites: former mining and industrial sites, forest and agricultural soils impacted by mining activities. The effect of yeast extract on the AsIII-oxidizing activity of the soil microflora is evaluated while considering the potential influence of soil parameters. Results suggest a variable influence of yeast extract on AsIII oxidation kinetics according to the range of yeast extract concentration. As a whole, experimental data strongly suggest a negative effect of organic matter on bacterial AsIII oxidation.
Mots-clés : arsenic microflore bactéries sols pollution spéciation
Type de document :
Communication dans un congrès
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https://hal-brgm.archives-ouvertes.fr/hal-00944103
Contributeur : Fabienne Battaglia-Brunet <>
Soumis le : lundi 10 février 2014 - 10:34:03
Dernière modification le : vendredi 10 mai 2019 - 13:54:16

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  • HAL Id : hal-00944103, version 1

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Tiffanie Lescure, Fabienne Battaglia-Brunet, Catherine Joulian, Catherine Hénault, Pascale Bauda. Influence of organic matters on the bacterial AsIII oxidation in polluted soils. 5th International Congress on Arsenic in the Environment, May 2014, Buenos Aires, Argentina. ⟨hal-00944103⟩

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