Surfactant enhanced remediation of soil columns contaminated by residual tetrachloroethylene
The ability of aqueous surfactant solutions to recover tetrachloroethylene (PCE) entrapped in Ottawa sand was evaluated in four column experiments. Residual PCE was emplaced by injecting (14)C-labeled PCE into water-saturated soil columns and displacing the free product with water. Miscible displacement experiments were conducted before and after PCE entrapment to determine the influence or residual PCE on column dispersivities. The first two column studies involved the injection of a 4% solution of polyoxyethylene (POE) (20) sorbitan monooleate, resulting in the removal of 90% and 97% of the residual PCE from 20-30- and 40-120-mesh Ottawa sand, respectively. Although micellar solubilization of PCE was the primary mode of recovery in these experiments, this process was shown to be rate-limited.
- Research Organization:
- Michigan Univ., Ann Arbor, MI (United States). Dept. of Civil and Environmental Engineering
- OSTI ID:
- 6651204
- Report Number(s):
- PB-95-136909/XAB; CNN: EPA-R-818647
- Country of Publication:
- United States
- Language:
- English
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