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dc.contributor.authorFridjonsson, E. O.
dc.contributor.authorSeymour, Joseph D.
dc.contributor.authorSchultz, Logan N.
dc.contributor.authorGerlach, Robin
dc.contributor.authorCunningham, Alfred B.
dc.contributor.authorCodd, Sarah L.
dc.identifier.citationFridjonsson EO, Seymour JD, Schultz LN, Gerlach R, Cunningham AB, Codd SL, "NMR measurement of hydrodynamic dispersion in porous media subject to biofilm mediated precipitation reactions," Journal of Contaminant Hydrology, March 2011 120-121:79-88en_US
dc.description.abstractNoninvasive measurements of hydrodynamic dispersion by nuclear magnetic resonance (NMR) are made in a model porous system before and after a biologically mediated precipitation reaction. Traditional magnetic resonance imaging (MRI) was unable to detect the small scale changes in pore structure visualized during light microscopy analysis after destructive sampling of the porous medium. However, pulse gradient spin echo nuclear magnetic resonance (PGSE NMR) measurements clearly indicated a change in hydrodynamics including increased pore scale mixing. These changes were detected through time-dependent measurement of the propagator by PGSE NMR. The dynamics indicate an increased pore scale mixing which alters the preasymptotic approach to asymptotic Gaussian dynamics governed by the advection diffusion equation. The methods described here can be used in the future to directly measure the transport of solutes in biomineral-affected porous media and contribute towards reactive transport models, which take into account the influence of pore scale changes in hydrodynamics.en_US
dc.titleNMR measurement of hydrodynamic dispersion in porous media subject to biofilm mediated precipitation reactionsen_US
mus.citation.journaltitleJournal of Contaminant Hydrologyen_US
mus.identifier.categoryChemical & Material Sciencesen_US
mus.identifier.categoryEngineering & Computer Scienceen_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentChemical Engineering.en_US
mus.relation.departmentChemistry & Biochemistry.en_US
mus.relation.departmentElectrical & Computer Engineering.en_US
mus.relation.departmentMicrobiology & Immunology.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.relation.researchgroupZero Emissions Research and Technology (ZERT).en_US

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