Insights into simultaneous microbial chromium and nitrate reduction: inhibitory effects and molecular mechanisms

BACKGROUND The potential effect of chromium on the denitrification process has drawn much attention recently. The efficient remediation of groundwater contaminated by both hexavalent chromate [Cr(VI)] and nitrate (NO 3 − ) was hampered due to the deficiency of denitrification in the presence of Cr(VI). The goal of this work was to understand the mechanisms of how Cr(VI) affected denitrification. RESULTS To better understand the underlying...