Ennoblement of stainless steel by the manganese-depositing bacterium leptothrix discophora

dc.contributor.authorDickenson, William H.
dc.contributor.authorCaccavo, Frank
dc.contributor.authorOlesen, Bo H.
dc.contributor.authorLewandowski, Zbigniew
dc.date.accessioned2018-02-09T22:29:24Z
dc.date.available2018-02-09T22:29:24Z
dc.date.issued1997-07
dc.description.abstractThe noble shift in open-circuit potential exhibited by microbially colonized stainless steel (ennoblement) was investigated by examining the relationship among surface colonization, manganese deposition, and open-circuit potential for stainless steel coupons exposed to batch cultures of the manganese-depositing bacterium Leptothrix discophora. Open-circuit potential shifted from -100 to +330 mV(infSCE) as a biofilm containing 75 nmol of MnO(infx) cm(sup-2) formed on the coupon surface but changed little further with continued MnO(infx) deposition up to 270 nmol cm(sup-2). Increased open-circuit potential corresponded to decreasing Mn(II) concentration in solution and to increased MnO(infx) accumulation and attached cell density on the coupon surfaces. MnO(infx) deposition was attributable to biological activity, and Mn(II) was observed to enhance cell attachment. The experimental results support a mechanism of ennoblement in which open-circuit potential is fixed near +350 mV(infSCE) by the cathodic activity of biomineralized MnO(infx).en_US
dc.identifier.citationDickinson, W.H., F. Caccavo, Jr., B. Olesen, and Z. Lewandowski, “Ennoblement of Stainless Steel by the Manganese-Depositing Bacterium Leptothrix discophora,” Applied and Environmental Microbiology, 63(7):2502-2506 (1997).en_US
dc.identifier.issn0099-2240
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/14335
dc.titleEnnoblement of stainless steel by the manganese-depositing bacterium leptothrix discophoraen_US
dc.typeArticleen_US
mus.citation.extentfirstpage2502en_US
mus.citation.extentlastpage2506en_US
mus.citation.issue7en_US
mus.citation.journaltitleApplied and Environmental Microbiologyen_US
mus.citation.volume63en_US
mus.data.thumbpage4en_US
mus.identifier.categoryEngineering & Computer Scienceen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentChemical Engineering.en_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US

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