Abstract
Microbial degradation of metals is associated with a wide range of biochemical processes, including acid metabolite production, galvanic coupling and differential aeration cell formation, in all of which the role of bacterial exopolymers is crucial We obtained exopolymerfrom a number of pure cultures associated with metal surfaces and measured their binding characteristics with a number of metal ions (Fe, Cu, Mn, Ni). All of the exopolymers strongly bound the metals, but there was variation in maximum binding abilities and stability constants. Differential binding within the biofilm would result in preferential oxidation of particular metal species, eg. concentration of specific ions by the exopolymer of the biofilm may result in oxidation of less noble ions in the metal lattice. Using electrical and polarization resistance techniques the effect of exopolymer-producing bacteria on metal biodeterioration rates was studied. This report discusses the relationship between exopolymer binding and corrosion kinetics.
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© 1988 Elsevier Science Publishers Ltd
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Ford, T.E., Maki, J.S., Mitchell, R. (1988). Involvement of Bacterial Exopolymers in Biodeterioration of Metals. In: Houghton, D.R., Smith, R.N., Eggins, H.O.W. (eds) Biodeterioration 7. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1363-9_49
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DOI: https://doi.org/10.1007/978-94-009-1363-9_49
Publisher Name: Springer, Dordrecht
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