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Groundwater Cleanup byin-situSparging. IV. Removal of Dense Nonaqueous Phase Liquid by Sparging Pipes

Susan D. Burchfield, David Wilson

Open publisher page 8 citations

Abstract

Mathematical models for describing the removal of dense nonaqueous phase liquid (DNAPL) droplets dispersed in a contaminated aquifer by air sparging are described. The sparging configurations considered are 1) a single air pipe discharging at the bottom of the aquifer and 2) a single horizontal slotted pipe discharging at the bottom of the aquifer. Diffusion transport of VOC is assumed to take place from spherical DNAPL droplets through a thick stagnant water layer in a porous medium to the moving aqueous phase. The dependence of removal rates on model parameters is explored.

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What this paper is about

Mathematical models for describing the removal of dense nonaqueous phase liquid (DNAPL) droplets dispersed in a contaminated aquifer by air sparging are described. The sparging configurations considered are 1) a single air pipe discharging at the bottom of the aquifer and 2) a single horizontal slotted pipe discharging at the bottom of the aquifer. Diffusion transport of VOC is assumed to take place from spherical DNAPL droplets through a thick stagnant water layer in a porous medium to the moving aqueous phase. The dependence of removal rates on model parameters is explored.

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Available abstract

Mathematical models for describing the removal of dense nonaqueous phase liquid (DNAPL) droplets dispersed in a contaminated aquifer by air sparging are described. The sparging configurations considered are 1) a single air pipe discharging at the bottom of the aquifer and 2) a single horizontal slotted pipe discharging at the bottom of the aquifer. Diffusion transport of VOC is assumed to take place from spherical DNAPL droplets through a thick stagnant water layer in a porous medium to the moving aqueous phase. The dependence of removal rates on model parameters is explored.

Key concepts: Sparging, Air sparging, Aquifer, Chemistry, Groundwater, Phase (matter), Porous medium, Human decontamination

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