Influence of the Iron-Reducing Bacteria on the Release of Heavy Metals in Anaerobic River Sediment

Abstract : The impact of autochthonous anaerobic bacteria on the release of metals in river sediment was studied. The sediments were characterized and bacterial activity was monitored in a batch reactor, where the sediments were incubated with a synthetic substrate solution containing glucose as carbon source. The results showed that metal release was correlated to the bacterial growth (carbon mineralization). In particular, a relationship between iron reduction and metal release was observed indicating that iron-reducing bacteria had a strong influence. By reductive dissolution of iron oxides, bacteria also released their associated toxic elements into the liquid phase. While organic analysis showed acetate and butyrate production leading to a decrease in pH and indicating a Clostridium fermentative bacteria activity, the results did not indicate any direct role of organic acids in the dissolution of iron and their associated metals.
Type de document :
Article dans une revue
Water, Air, and Soil Pollution, Springer Verlag, 2010, pp.10.1007/s11270-010-0327-y. 〈10.1007/s11270-010-0327-y〉
Liste complète des métadonnées

https://hal-bioemco.ccsd.cnrs.fr/bioemco-00456373
Contributeur : Noureddine Bousserrhine <>
Soumis le : dimanche 14 février 2010 - 19:10:26
Dernière modification le : vendredi 27 juillet 2018 - 15:04:50

Lien texte intégral

Identifiants

Citation

Catherine Gounou, Noureddine Bousserrhine, Gilles Varrault, Jean-Marie Mouchel. Influence of the Iron-Reducing Bacteria on the Release of Heavy Metals in Anaerobic River Sediment. Water, Air, and Soil Pollution, Springer Verlag, 2010, pp.10.1007/s11270-010-0327-y. 〈10.1007/s11270-010-0327-y〉. 〈bioemco-00456373〉

Partager

Métriques

Consultations de la notice

839