NUMERICAL SIMULATION OF DNAPL CONTAMINANT TRANSPORT AND REMEDIATION IN A THREE-DIMENSIONAL HETEROGENEOUS SUBSURFACE

摘要

Surfactant-enhanced aquifer remediation (SEAR) is a promising remediation technology for cleaning up DNAPL contamination in groundwater systems. However, simulation of SEAR measures involves complex multiphase systems and the related mathematical models are still under active research and development. In this study, a numerical model for simulating surfactant-enhanced groundwater remediation processes is introduced. The model is three-dimensional and permits heterogeneous distributions of properties to appropriately assess the conditions present at the field scale. The model is applied to a hypothetical PCE-contaminated site for simulating the surfactant-flushing process, and demonstrating the role of numerical modeling approaches in SEAR design, the accomplishment of modeling process, the required information, and the expected remediation efficiency.