Size-Dependent Reduction Kinetics of Iron Oxides in Single and Mixed Mineral Systems.

ABSTRACT: Iron(III) (oxyhydr)oxide minerals with varying particle sizes commonly coexist in natural environments and are susceptible to both chemical and microbial reduction, affecting the fate and mobility of trace elements, nutrients, and pollutants. The size-dependent reduction behavior of iron (oxyhydr)oxides in single and mixed mineral systems remains poorly understood. In this study, we used microbial and mediated electrochemical reduction approaches to investigate the reduction kinetics and extents of goethite and hematite. We found that small particles were preferentially reduced relative to their large counterparts in single and mixed mineral systems regardless of microbial or electrochemical treatments, which is attributed to the combined effect of higher thermodynamic favorability and gre

SUBMITTER: Xu X 

PROVIDER: S-EPMC11823449 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature