Lack of production of electron-shuttling compounds or solubilization of Fe(III) during reduction of insoluble Fe(III) oxide by Geobacter metallireducens

Article Abstract:

Reduction of insoluble Fe(III) oxide by Geobacter metallireducens is discussed with consideration of the lack of production of electron-shuttling compounds or solubilization of Fe(III) in the process. Certain mechanisms for Fe(III) oxide reduction have been shown to be invalid, making the existence of reduction by this organism uncertain. Several experimental approaches show G metallireducens does not release electron-shuttle compounds and does not significantly solubilize Fe(III) in F(III) oxide reduction. It seems G metallireducens directly reduces insoluble Fe(III) oxide.

United States, Usage, Physiological aspects, Soil microbiology, Biogeochemistry, Electron mobility, Iron oxides

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Vanadium respiration by geobacter metallireducens: Novel strategy for in situ removal of vanadium from groundwater

Article Abstract:

Vanadium can be an important contaminant in groundwaters impacted by mining activities. A study conducted reveals that G. metallireducens can grow through vanadium respiration and that stimulating the activity of Geobacteraceae can be an effective strategy for in situ immobilization of vanadium in contaminated subsurface environments.

Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Uranium-radium-vanadium ores, Vanadium, Microbiology, Properties

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Biofilm and nanowire production leads to increased current in Geobacter sulfurreducens fuel cells

Article Abstract:

Geobacter sulfurreducens developed highly structured, multilayer biofilms on the anode surface of a microbial fuel cell converting acetate to electricity. Cells at a distance from the anode remained viable, and there is no decrease in the efficiency of current production as the thickness of the biofilm increased.

ELECTRONIC & OTHER ELECTRIC EQUIPMENT, Fuel Cells & Thermic Generators, All Other Miscellaneous Electrical Equipment and Component Manufacturing, Genetic aspects, Microbial mats, Sulfur bacteria, Fuel cells, Structure, Sulphur bacteria, Iron bacteria, Metal-reducing bacteria, Report

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