The capture and removal of a continuously produced, migrating Volatile Organic Compound (VOC) plume are demonstrated in a sandbox model using the in-well vapor stripping system. The transport and removal processes are analyzed using a laboratory-scale aquifer setup and numerical modeling. The spatial and temporal concentration variations of three VOCs (trichloroethylene, toluene and chloroform) and one non-volatile tracer (potassium) were determined using eight quadruple-level samplers evenly positioned throughout the model aquifer. The electrical conductivity of the K+-spiked water was continuously monitored using electrodes placed near the 32 sampling points. Laboratory results were numerically reproduced using 3-D flow and transport modeling combined with VOC volatilization and removal. The experiment was designed such that it was possible to distinguish (downgradient) between two groundwater bodies; the upper that was captured by the stripping well, and the lower unaffected by the remediation system. Thereby, the primary factors of efficiency of this remediation technique were evaluated. Copyright (C) 2000 Elsevier Science B.V.
Bibliographical noteFunding Information:
This research was carried out as part of the M.Sc. research of the first author at the Institute of Earth Sciences, the Hebrew University of Jerusalem, Israel. We are grateful to Prof. A. Katz for his help at the laboratory, to Dr. V. Lyakhovsky for his help with the numerical modeling, and to Prof. S. Gorelick and Dr. M. Pinto for their constructive suggestions. The research was supported by a grant from the Brumberg Fund.
- Numerical models
- Solute transport