Microbial Ecology

, Volume 14, Issue 1, pp 81-89

First online:

Anaerobic dissolution of iron-phosphorus complexes in sediment due to the activity of nitrate-reducing bacteria

  • Mats JanssonAffiliated withInstitute of Geography, University of Umeå

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Nitrate-reducing bacteria (Pseudomonas fluorescens andAlcaligenes sp.) as well as extracellular compounds from these bacteria increased the dissolution rate of iron and phosphorus sorbed to iron precipitates during anaerobic, nitrate-free conditions in experimental sediment-water systems. It is suggested that the influence of the bacteria is due to enzymatic catalyzation of chemical iron reduction.