期刊
BIORESOURCE TECHNOLOGY
卷 108, 期 -, 页码 55-59出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.10.040
关键词
Microbial fuel cells; Wetland plant; Radius oxygen loss; Rice; Biocathode
资金
- National Science Foundation of China [41090280]
- Knowledge Innovation Program of CAS [KZCX2-EW-402]
Wetland plants possess the unique ability to release oxygen as well as organic matter into the rhizosphere. It is understood that microbial fuel cells (MFCs) can use organic matter from plants as key electron donors, but the effect of root excreted oxygen on MFCs is presently unknown. In this study, a novel biocathode was buried in the rice rhizosphere and found to be capable of delivering electrons to root excreted oxygen for oxygen reduction reactions. The voltages between electrodes in the rhizosphere and bulk soil were found to increase initially, but dissipate after approximately 1 month. Results from the MFC and oxygen microelectrode experiments indicated that the oxygen efflux rate from rice roots was dependent on the root maturity. Furthermore, the excreted oxygen from wetland plant roots could be used for the construction of highly efficient biocathodes. (c) 2011 Elsevier Ltd. All rights reserved.
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