Abstract
The microbial reduction process of goethite by Shewanella decolorationis S12 was evaluated. The results showed the electron shuttle, anthraquinone-2-sulfonate (AQS), could enhance the microbial reduction. The thermodynamic and kinetic characteristics of goethite reduction by microorganisms were influenced by AQS, concentrations of iron oxide, and electron donor. Transformation between oxidized and reduced species of the electron shuttle during the microbial reduction could be newly noticed. Two interactive steps, biotic and abiotic, were involved in the microbial reduction of Fe (III) oxide mediated by electron shuttle.
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