Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, CO 80309-0428
A two-dimensional dissolution experiment was conducted to examine the influence of dimensionality and rate-limited mass transfer on the dissolution of an entrapped, multicomponent nonaqueous phase liquid. A synthetic gasoline mixture entrapped below the water table in a coarse gravel lens provided a source zone of benzene. Downgradient aqueous concentrations gave insight on the dissolution process at both high organic saturation and at residual organic saturation after the free product was recovered. Modeling of the system was undertaken using a decoupled approach. The ground water flow field was established first, then a solute transport model incorporating a rate-limited dissolution term was used to describe the dissolution and transport of benzene from the entrapped nonaqueous phase mixture.
nonaqueous phase liquids, dissolution, ground water
This paper is from the Proceedings of the 10th Annual Conference on Hazardous Waste Research 1995, published in hard copy and on the Web by the Great Plains/Rocky Mountain Hazardous Substance Research Center.
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