TRANSFORMATION OF URANIUM BY BIOGENIC Fe(II) PHASES RESULTING FROM THE BIOREDUCTION OF Fe(III) OXIDES BY SHEWANELLA PUTREFACIENS CN32

摘要

Biogenic Fe(II) phases (magnetite, green rust, siderite, vivianite, etc.) provide a reservoir of reducing capacity in the subsurface that may contribute to the reduction of contaminants such as U(VI). In this study we examined the potential for reduction of U(VI) in the presence of biogenic green rust, (BioGR) biogenic magnetite (BioMAG) and biogenic siderite (BioSID) resulting from the bioreduction of Fe(III) oxides (lepidocrocite and ferrihydrite) by Shewanella putrefaciens CN32.