Degradation of petroleum hydrocarbons by using iron-reducing bacteria

Abstract:

Iron-reducing bacteria can reduce Fe(III) to Fe(II) by using the extracellular Fe(III) as a terminal electron acceptor and oxidizing organic compounds. The iron reduction widely occurs in soils, rivers, oceans, surface aquifers, and deep petroleum reservoirs at high temperatures and pressures. Anaerobic degradation of organic compounds coupled with Fe(III)-reduction is of great importance to the biogeochemical cycle of iron and carbon. This paper examines a variety of iron-reducing bacteria and their mechanisms. It also summarizes the research and development (R&D) progresses of using iron-reducing bacteria in degradation of petroleum hydrocarbons. In addition, the potential role of iron-reducing bacteria in bioremediation is also discussed. Finally, some future studies of iron-reducing bacteria are recommended.