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    Effect of Set Potential on Hexavalent Chromium Reduction and Electricity Generation from Biocathode Microbial Fuel Cells

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    Type
    Article
    Authors
    Huang, Liping
    Chai, Xiaolei
    Chen, Guohua
    Logan, Bruce E
    KAUST Grant Number
    KUS-I1-003-13
    Date
    2011-06
    Permanent link to this record
    http://hdl.handle.net/10754/598058
    
    Metadata
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    Abstract
    Setting a biocathode potential at ?300 mV improved the subsequent performance of an MFC for Cr(VI) reduction compared to a control (no set potential). With this set potential, the startup time was reduced to 19 days, the reduction of Cr(VI) was improved to 19.7 mg/L d, and the maximum power density was increased to 6.4 W/m3 compared to the control (26 days, 14.0 mg/L d and 4.1 W/m3). Set potentials of ?150 mV and ?300 mV also improved system performance and led to similarly higher utilization of metabolic energy gained (PMEG) than set potentials of +200 mV and ?450 mV. We observed putative pili at ?150 and ?300 mV potentials, and aggregated precipitates on bacterial surfaces in both poised and nonpoised controls. These tests show that there are optimal potentials that can be set for developing a Cr(VI) biocathode. © 2011 American Chemical Society.
    Citation
    Huang L, Chai X, Chen G, Logan BE (2011) Effect of Set Potential on Hexavalent Chromium Reduction and Electricity Generation from Biocathode Microbial Fuel Cells. Environ Sci Technol 45: 5025–5031. Available: http://dx.doi.org/10.1021/es103875d.
    Sponsors
    We gratefully acknowledge financial support from the Natural Science Foundation of China (No. 21077017), Program for Changjiang Scholars and Innovative Research Team in University (IRT0813), "Energy + X" (2008) key programme through Dalian University of Technology, and the support of the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13).
    Publisher
    American Chemical Society (ACS)
    Journal
    Environmental Science & Technology
    DOI
    10.1021/es103875d
    PubMed ID
    21528902
    ae974a485f413a2113503eed53cd6c53
    10.1021/es103875d
    Scopus Count
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