PMID: 18186327Jan 12, 2008Paper

Carbon and steel surfaces modified by Leptothrix discophora SP-6: characterization and implications

Environmental Science & Technology
Tuan Anh NguyenXianming Shi

Abstract

Leptothrix discophora SP-6, a type of manganese(Mn)-oxidizing bacteria, has been known to accumulate Mn oxides from the aqueous environment and thus play a key role in microbiologically influenced corrosion by increasing the electrochemical potential of steel and other metals. Similarly, this bacterium was found to modify the surface of glassy carbon in aqueous solution and increase its potential (i.e., ennoblement). In the latter case, biomineralized Mn oxides can be used as cathodic reactants for a new generation of microbial fuel cells featuring a biocathode. In this preliminary study, factors affecting the biofilm formation and biomineralization processes were examined. The inflow of air into the culture medium was found essential to sustain the ennoblement of substrate electrodes. The OCP and FESEM/EDS data indicated that a smoother initial substrate surface generally led to better ennoblement. Polarizing the carbon electrode at +500 mV(SCE) for 15 min was found to facilitate the ennoblement on carbon electrodes, and so did coating it with a poly(L-lysine) layer. Independent of substrate material, initial surface roughness, and pretreatment, there were three parameters in the EIS equivalent circuit that correlated well wit...Continue Reading

References

Feb 1, 1987·Journal of Bacteriology·F C Boogerd, J P de Vrind
Jul 1, 1981·Canadian Journal of Microbiology·A S GordonL R Udey
Nov 27, 1999·Journal of Microbiological Methods·X YangZ Lewandowski
Jun 30, 2005·Environmental Science & Technology·Hong LiuBruce E Logan
Jul 29, 2005·Environmental Science & Technology·Allison RhoadsZbigniew Lewandowski
Aug 2, 2005·Trends in Microbiology·Bradley M TeboAlexis S Templeton
Oct 6, 2005·Applied and Environmental Microbiology·Juan Pablo Busalmen, Susana R de Sánchez
Jul 1, 1997·Applied and Environmental Microbiology·W H DickinsonZ Lewandowski
Oct 31, 2006·Journal of Biomedical Materials Research. Part a·Haiying TangK Y Simon Ng
Apr 15, 1992·Biotechnology and Bioengineering·K A Natarajan

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