Author(s): O. Weber; U. Mohrlok; G. H. Jirka
Linked Author(s):
Keywords: Mass transfer process; Groundwater circulation well; Groundwaterremediation
Abstract: Vertical circulation flow systems induced by groundwater circulation wells are an established in-situ groundwater pollution remediation technique. For a effective remediation of a groundwater pollution with a groundwater circulation well it was necessary to unterstand the influence of a circulation flow field on the mass transfer process. Therefore one-dimensional soil column experiments and two-dimensional tank experiments with a circulation flow field have been carried out to systematically investigate the mass transfer process between the residual NAPL and the aqueous phase. A dissolution model to describe the mass transfer process has been developed. This model assumes that the each residual NAPL phase has a spherical shape and is homogeneously distributed in the porous medium. With this model it was possible to determine the mass removed during the experiments and to estimate from experimental data the initial NAPL mass in the contamination source.
Year: 1999