ABSTRACT
The efficiency of enhanced in situ remediation techniques in order to remove organic phase (NAPL) contamination is limited by the heterogeneous structure of the subsurface and the related NAPL phase distribution. The groundwater circulation well (GCW) introduces a strong vertical circulation flow field which enables the controlled flushing of the contamination source. Large scale experiments in artificially contaminated heterogeneous aquifers were conducted. The dissolution rate could be increased and therefore remediation time was decrease. The operation of the GCW could be adapted to the contaminant properties as well as to the subsurface structure.
