Aquifer Microbial Communities Differentially Display Metabolisms Capable of Secondary Effects on Uranium Speciation Across a Former Metal Processing Site.

Microbial communities at a uranium-contaminated aquifer site show potential for secondary uranium reduction via sulfide, with 4 of 11 sites capable of this process.

• Why it matters: Understanding microbial metabolisms that influence uranium speciation is crucial for improving bioremediation strategies in contaminated groundwater, especially where direct reduction is absent.
• What they did: Genomic and metabolic analyses of microbial communities across 11 sites revealed diverse metabolisms, including nitrogen, manganese, iron reduction, and sulfide oxidation, with specific potential for uranium reduction through secondary reactions.
• The result: Findings suggest that biogenic sulfide could facilitate uranium reduction in certain sites, providing a microbial pathway to enhance remediation efforts and inform site-specific treatment approaches.