Modeling of dense nonaqueous phase liquid removal from aquifers by sparging and pump‐and‐treat operations∗

Presented at the American Chemical Society I&EC Special Symposium, Emerging Technologies in Hazardous Waste Management IV, Atlanta, Georgia, September 21–23, 1992.

Abstract

Microcomputer programs for modeling the removal of dense nonaqueous phase liquid (DNAPL) droplets and ganglia from aquifers by pump‐and‐treat operations and sparging techniques are described and results obtained with these programs are presented. The programs permit the modeling of diffusion‐limited mass transport from the stationary DNAPL ganglia to the advecting aqueous phase; diffusion transport is assumed to take place from DNAPL droplets through a thick stagnant water layer in a porous medium to the advecting mobile water. The dependence of DNAPL removal rates on the various model parameters (i.e., DNAPL aqueous solubility, Henry's constant, diffusion constant, droplet size; air and water flow rates; system geometrical parameters) is discussed.

Notes

Presented at the American Chemical Society I&EC Special Symposium, Emerging Technologies in Hazardous Waste Management IV, Atlanta, Georgia, September 21–23, 1992.

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