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Full-Text Articles in Geophysics and Seismology
Investigating The Impact Of Microbial Interactions With Geologic Media On Geophysical Properties, Caroline A. Davis
Investigating The Impact Of Microbial Interactions With Geologic Media On Geophysical Properties, Caroline A. Davis
Doctoral Dissertations
"The goals of this study were to investigate the effect of: (1) microbial metabolic byproducts, microbial growth, and biofilm formation on the low frequency electrical properties of porous media, (2) biofilm formation on acoustic wave properties, and (3) the natural electrical (self-potential) signatures associated with an in-situ biological permeable reactive barrier (PRB). The results suggest: (1) increases in electrolytic conductivity are consistent with increased concentrations of organic acids and biosurfactants; (2) mineral weathering promoted by organic acids causes increases in electrolytic conductivity, concomitant with increases in major cation concentrations; (3) interfacial conductivity generally parallels microbial cell concentrations and biofilm formation; …