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论文类型： 期刊论文

发表时间： 2010-10-01

发表刊物： BIOPROCESS AND BIOSYSTEMS ENGINEERING

收录刊物： SCIE、EI、PubMed、Scopus

卷号： 33

期号： 8

页面范围： 937-945

ISSN号： 1615-7591

关键字： Microbial fuel cells; Biocathode; Cr (VI) reduction rate; Power production

摘要： Enhancement of Cr (VI) reduction rate and power production from biocathode microbial fuel cells (MFCs) was achieved using indigenous bacteria from Cr (VI)-contaminated site as inoculum and MFC architecture with a relatively large cathode-specific surface area of 340-900 m(2) m(-3). A specific Cr (VI) reduction rate of 2.4 +/- A 0.2 mg g(-1)VSS h(-1) and a power production of 2.4 +/- A 0.1 W m(-3) at a current density of 6.9 A m(-3) were simultaneously achieved at an initial Cr (VI) concentration of 39.2 mg L(-1). Initial Cr (VI) concentration and solution conductivity affected Cr (VI) reduction rate, power production and coulombic efficiency. These findings demonstrate the importance of inoculation and MFC architecture in the enhancement of Cr (VI) reduction rate and power production. This study is a beneficial attempt to improve the efficiency of biocathode MFCs and provide a good candidate of bioremediation process for Cr (VI)-contaminated sites.