A novel sediment microbial fuel cell with a biocathode in the rice rhizosphere

被引：105

作者：

Chen, Zheng ^{[1
]}

Huang, Yan-chao ^{[1
]}

Liang, Jian-hong ^{[1
]}

Zhao, Feng ^{[2
]}

Zhu, Yong-guan ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China

[2] Chinese Acad Sci, Inst Urban Environm, Xiamen 361021, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2012年 / 108卷

基金：

美国国家科学基金会;

关键词：

Microbial fuel cells; Wetland plant; Radius oxygen loss; Rice; Biocathode; OXYGEN EXPOSURE; ROOTS; COOPERATION; PERFORMANCE; ELECTRICITY; COMMUNITY; NUTRITION; PLAQUE;

D O I：

10.1016/j.biortech.2011.10.040

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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.

引用

页码：55 / 59

页数：5

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