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Simulation of reactive contaminant migration in physically and chemically heterogeneous porous media



Simulation of reactive contaminant migration in physically and chemically heterogeneous porous media



Abstracts with Programs - Geological Society of America 32(7): 70



Large-scale rates of migration, dilution and transformation of contaminant mixtures in natural geologic media can be affected by smaller-scale heterogeneity in the physical and chemical properties of the formation. Natural variation in hydraulic conductivity has long been known to accelerate dilution and spreading in aqueous contaminant plumes; associated variation in reactive mineral abundance or specific sorption capacity can also impact the perceived rates of migration and dilution. Here, we will present a series of data analyses and example simulations that show the existence and impacts of chemical heterogeneity on the mobility of various types of reactive contaminants. In short, the results indicate that identification of reactive properties of lab scale geologic samples may misrepresent what is happening at the field scale. These types of results are being used to develop plans for more specific data gathering efforts and to suggest better approaches for understanding and characterizing the nature of reactive transport at larger scales of observation.

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Accession: 020023332

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