publication . Article . 2011

Uranium speciation and stability after reductive immobilization in sediments.

Sharp J.O;
Closed Access
  • Published: 01 Jan 2011 Journal: Geochimica and Cosmochimica Acta, volume 75, pages 6,497-6,510
Abstract
It has generally been assumed that the bioreduction of hexavalent uranium in groundwater systems will result in the precipitation of immobile uraninite (UO2). In order to explore the form and stability of uranium immobilized under these conditions we introduced lactate (15 mM for 3 months) into flow through columns containing sediments derived from a former uranium processing site at Old Rifle CO. This resulted in metal reducing conditions as evidenced by concurrent uranium uptake and iron release. Despite initial augmentation with Shewanella oneidensis bacteria belonging to the phylum Firmicutes dominated the biostimulated columns. The immobilization of uranium...
Subjects
mesheuropmc: complex mixturesinorganic chemicalstechnology, industry, and agriculture
Funded by
SNSF| Microbial and geochemical controls on the formation of molecular U(IV) as a product of U(VI) bioreduction
Project
  • Funder: Swiss National Science Foundation (SNSF)
  • Project Code: 200020_126821
  • Funding stream: Project funding | Project funding (Div. I-III)
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