Geobacter metallireducens

The first Geobacter species designated as strain GS-15 was the first organism found to oxidize organic compounds to carbon dioxide with iron oxides. Geobacteraceae, a family of Fe(III)-respiring Delta-proteobacteria that are of interest for their role in the cycling of carbon and metals in aquatic sediments and subsurface environments (Aklujkar et al., 2009). As well as bioremediation of harvesting electricity from complexorganic matter organic and metal-contaminated groundwater. They can transfer electrons onto the surface of electrodes. Geobacter metallireducens is also known to oxidize monoaromatic compounds, various short-chain fatty acids and alcohols. Its environmental impact also involves the capability to collect electricity from waste organic matter and renewable biomass. In simple terms, Geobacter metallireducens gains its energy by using iron oxides in the equivalent way humans consume oxygen. However, Geobacter metallireducenshave an unusual survival tactic as the microbe can spontaneously grow flagella to find new energy sources (Dalke, 2002). This is particularly interesting as it has the aptitude to perform chemotaxis and grow flagella to move toward metallic compounds or favorable environments. In addition, this anaerobe oxidizes monoaromatic compounds with Fe(III) as the solitary electron acceptor. Microorganisms that use insoluble Fe(III) oxide as an electron acceptor can have an essential function in aquatic sediments’ carbon and nutrient cycles and the bioremediation of organic and metal contaminantsgroundwater (Childers et al., 2002). The participation in the bioremediation of this microbe is interesting because of its role in environmental restoration. Geobacter metallireducens can destroy petroleum contaminants in polluted groundwater by oxidizing these compounds to harmless carbon dioxide. Its also helpful for removing radioactive metal contaminants from groundwater. Geobacter metallireducens consume these radioactive elements and break down the contaminants. For example, when it absorbs uranium, it transforms the metal from soluble to insoluble. The insoluble uranium drops out of the groundwater, decontaminating streams and drinking water.