A Systematic Approach to Uncovering Scale-independent Rate Formulations for Bioreduction of Hematite in Sediments at a Field Site

Chun-Wen Chen, , William D. Burgos, Morgan L. Minyard & Chun-Wen Chen
This presentation focuses on a systematic modeling approach in search of scale- independent rate formulations for biological reduction of hematite. Biological and chemical processes controlling Fe(III) reduction are very complex including direct bioreduction of ferric irons, microbial growth, secondary reactions of biogenic ferrous iron adsorptions, iron complexation, precipitation of ferrous minerals, and re-oxidation. A reaction network of five reactions was proposed to describe these processes under laboratory-controlled batch and column experiments which were conducted using...
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