Electrochemical activity of an Fe(III)-reducing bacterium, Shewanella putrefaciens IR-1, in the presence of alternative electron acceptors |
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| Authors: | Byung Hong Kim Tokuji Ikeda Hyung Soo Park Hyung Joo Kim Moon Sik Hyun Kenji Kano Kazuyoshi Takagi Hirosuke Tatsumi |
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| Institution: | (1) Water Environment Research Centre, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, c[Sungpook-ku, Seoul , 136-791, Korea;(2) Division of Applied Life Science, Graduate School of Agriculture, Kyoto University, Sankyo-ku, Kyoto, 606, Japan |
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| Abstract: | Cyclic voltammetry demonstrated that cells of Shewanella putrefaciens grown under anaerobic conditions without nitrate were electrochemically active. The electrochemical activity was inactivated reversibly by exposure to air, but not by nitrate. Lactate and an applied potential at +200 mV against an Ag/AgCl reference electrode restored the electrochemical activity. These findings can be used to improve the performance of a mediator-less microbial fuel cell using electrochemically active bacteria in the presence of nitrate. |
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| Keywords: | bioelectrochemistry cyclic voltammetry metal reducing bacterium Shewanella putrefaciens |
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