Identifying and Quantifying the Intermediate Processes during Nitrate-Dependent Iron(II) Oxidation.

ABSTRACT: Microbially driven nitrate-dependent iron (Fe) oxidation (NDFO) in subsurface environments has been intensively studied. However, the extent to which Fe(II) oxidation is biologically catalyzed remains unclear because no neutrophilic iron-oxidizing and nitrate reducing autotroph has been isolated to confirm the existence of an enzymatic pathway. While mixotrophic NDFO bacteria have been isolated, understanding the process is complicated by simultaneous abiotic oxidation due to nitrite produced during denitrification. In this study, the relative contributions of biotic and abiotic processes during NDFO were quantified through the compilation and model-based interpretation of previously published experimental data. The kinetics of chemical denitrification by Fe(II) (chemodenitrification) were

SUBMITTER: Jamieson J 

PROVIDER: S-EPMC6427828 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature