期刊
BIORESOURCE TECHNOLOGY
卷 254, 期 -, 页码 16-22出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.01.066
关键词
Biocathode; NO removal; Direct electron transfer; Fe(II)-assisted autotrophic denitrification; Bacterial nanowires; Microbial community
资金
- National Natural Science Foundation of China [21776247]
- National Key R&D Program of China [2017YFC0210904]
- National Key Technology R&D Program of China [2015BAD21B02]
A biocathode with the function of Fe(III) EDTA and Fe(II) EDTA-NO reduction was applied in a microbial electrolysis cell coupled with chemical absorption for NO removal from flue gas. As the mediated electron transfer was excluded by the same electrochemical characterizations of the biocathodes before and after a 48 h continuous operation, the profiles of reduction experiments indicated that direct electron transfer was the main mechanism of Fe(III) EDTA reduction, while Fe(III) EDTA-NO was mainly reduced via Fe(II)-assisted autotrophic denitrification. The microscopy of the biocathode confirmed the existence of pili, which was supposed to be bacterial nanowires for electron transfer. The analysis of microbial community revealed that iron-reducing bacteria, including Escherichia coli, had the possibility of electron uptake from electrode via physical contact. These results first time gave us in-depth understanding of the electron transfer in the multifunctional biocathode and mechanism for further enhancement of the bioreduction processes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据