Reduction and immobilization of hexavalent chromium by microbially reduced Fe-bearing clay materials

Hexavalent chromium (Cr6+) is a major contaminant in the environment. As a redox-sensitive element, the fate and toxicity of chromium is controlled by reduction-oxidation (redox) reactions. Previous research has shown the ability of structural Fe(II) in naturally present and chemically reduced clay minerals to reduce Cr6+ to Cr(III) as a way of immobilization and detoxification. However, it is still poorly known whether or not structural Fe(II) in biologically reduced clay minerals exhibits a similar reactivity and if so, what the kinetics and mechanisms of Cr6+ reduction are.

Published in

Geochimica et Cosmochimica Acta

Authored by

Bishop, M. E.; Glasser, P.; Dong, H.; Arey, B. W.; Kovarik, L.

Publication date

Saturday, February 1, 2014
Resource category
Technique category