Remedial Options for Creosote‐ Contaminated Sites

Free-phase DNAPL recovery operations are becoming increasingly prevalent at creosote-contaminated aquifer sites. This paper illustrates the potential of both classical and innovative recovery methods. The UTCHEM multiphase flow and transport numerical simulator was used to predict the migration of creosote DNAPL during a hypothetical spill event, during a long-term redistribution after the spill, and for a variety of subsequent free-phase DNAPL recovery operations. The physical parameters used for the DNAPL and the aquifer in the model are estimates for the DNAPL and the aquifer in the model are estimates for a specific creosote DNAPL site. Other simulations were also conducted using physical parameters that are typical of a trichloroethene (TCE) DNAPL. Dramatic differences in DNAPL migration were observed between these simulations.

[1]  Kamy Sepehrnoori,et al.  Simulation of surfactant-enhanced aquifer remediation , 1994 .

[2]  Kamy Sepehrnoori,et al.  A compositional simulator for modeling surfactant enhanced aquifer remediation, 1 Formulation , 1996 .

[3]  G. Michael Shook,et al.  Prediction and minimization of vertical migration of DNAPLS using surfactant enhanced aquifer remediation at neutral buoyancy , 1998 .

[4]  G. Pope,et al.  Characterization of a TCE DNAPL Zone in Alluvium by Partitioning Tracers , 1999 .

[5]  P. Gélinas,et al.  Laboratory Study of Polymer Solutions Used for Mobility Control During In Situ NAPL Recovery , 1998 .

[6]  Gary A. Pope,et al.  Influence of Viscous and Buoyancy Forces on the Mobilization of Residual Tetrachloroethylene during Surfactant Flushing , 1996 .

[7]  G. L. Stegemeier.  Relationship of Trapped Oil Saturation to Petrophysical Properties of Porous Media , 1974 .

[8]  E. Sudicky.  A natural gradient experiment on solute transport in a sand aquifer: Spatial variability of hydraulic conductivity and its role in the dispersion process , 1986 .

[9]  Gary A. Pope,et al.  Field Demonstration of the Surfactant/Foam Process for Aquifer Remediation , 1997 .

[10]  Gary A. Pope,et al.  Surfactant enhanced remediation of soil columns contaminated by residual tetrachloroethylene , 1994 .

[11]  S. Powers,et al.  Wettability of NAPL-Contaminated Sands , 1996 .

[12]  C. C. West,et al.  Surfactant Remediation Field Demonstration Using a Vertical Circulation Well , 1997 .

[13]  J. Jawitz,et al.  Miscible fluid displacement stability in unconfined porous media:. Two-dimensional flow experiments and simulations , 1998 .

[14]  Gary A. Pope,et al.  A new concept: the use of neutrally-buoyant microemulsions for DNAPL remediation , 1998 .

[15]  R. E. Brown,et al.  Design of a Surfactant Remediation Field Demonstration Based on Laboratory and Modeling Studies , 1997 .

[16]  James W. Mercer,et al.  A review of immiscible fluids in the subsurface: properties, models, characterization and remediation , 1990 .

[17]  Gary A. Pope,et al.  Anionic surfactant remediation of soil columns contaminated by nonaqueous phase liquids , 1999 .

[18]  Mojdeh Delshad,et al.  A Mixed-Wet Hysteretic Relative Permeability and Capillary Pressure Model in a Chemical Compositional Reservoir Simulator , 1999 .

[19]  Craig Taylor,et al.  A Controlled Field Test of Surfactant‐Enhanced Aquifer Remediation , 1996 .

[20]  Michael A. Celia,et al.  Large-scale natural gradient tracer test in sand and gravel, Cape Cod, Massachusetts: 3. Hydraulic c , 1992 .

[21]  Gary A. Pope,et al.  An overview of surfactant enhanced aquifer remediation , 1998 .

[22]  Kamy Sepehrnoori,et al.  Partitioning Tracer Test for Detection, Estimation, and Remediation Performance Assessment of Subsurface Nonaqueous Phase Liquids , 1995 .