Issue 13, 2012

Evaluation of microbial fuel cell Shewanella biocathodes for treatment of chromate contamination

Abstract

This paper presents data comparing Shewanella strains acting as biocatalysts under fumarate and chromate reducing conditions in a microbial fuel cell. Catalyzing fumarate reduction, Shewanella strains show a maximum power generation of between 10.2 and 59.4 nW cm−2. Comparisons between product formation and current transfer indicate either incomplete oxidation of fumarate or utilization of a separate source of electrons. Similar comparisons under chromate reducing conditions indicate initial utilization of the electrode as the sole electron source followed by a use of an unknown reducing electron pool. Additionally, we show that fuel cell systems, with Shewanella acting as the sole biocatalysts at the cathode, are capable of achieving reduction of chromium concentrations to less than 5 ppb, well within acceptable guidelines established by regulatory agencies.

Graphical abstract: Evaluation of microbial fuel cell Shewanella biocathodes for treatment of chromate contamination

Supplementary files

Article information

Article type
Paper
Submitted
14 Mar 2012
Accepted
02 Apr 2012
First published
13 Apr 2012

RSC Adv., 2012,2, 5844-5855

Evaluation of microbial fuel cell Shewanella biocathodes for treatment of chromate contamination

L. Hsu, S. A. Masuda, K. H. Nealson and M. Pirbazari, RSC Adv., 2012, 2, 5844 DOI: 10.1039/C2RA20478A

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