A limited microbial consortium is responsible for extended bioreduction of uranium in a contaminated aquifer.

ABSTRACT: Subsurface amendments of slow-release substrates (e.g., emulsified vegetable oil [EVO]) are thought to be a pragmatic alternative to using short-lived, labile substrates for sustained uranium bioimmobilization within contaminated groundwater systems. Spatial and temporal dynamics of subsurface microbial communities during EVO amendment are unknown and likely differ significantly from those of populations stimulated by soluble substrates, such as ethanol and acetate. In this study, a one-time EVO injection resulted in decreased groundwater U concentrations that remained below initial levels for approximately 4 months. Pyrosequencing and quantitative PCR of 16S rRNA from monitoring well samples revealed a rapid decline in groundwater bacterial community richness and diversity after EVO injec

SUBMITTER: Gihring TM 

PROVIDER: S-EPMC3165427 | biostudies-literature | 2011 Sep

REPOSITORIES: biostudies-literature