Laboratory column studies of chlorinated solvent remediation in subsurface media using food grade surfactants
- Univ. of Oklahoma, Norman, OK (United States)
Laboratory column studies were conducted to evaluate enhanced removal of chlorinated solvents using food grade surfactants via solubilization and microemulsification (mobilization) mechanisms. Nonionic T-MAZ-60 (sorbitan polyethoxylate monostearate) was used for solubilization studies, and mixtures of anionic bis-2-ethylhexyl sodium sulfosuccinate (AOT) and sodium mono and dimethyl naphthalene sulfonate (SMDNS) were used for microemulsification (Winsor Type III) studies. Solubility enhancements of PCE demonstrated that microemulsification is an order of magnitude more efficient than solubilization in the two media utilized (glass beads and alluvial sand). The kinetics of PCE elution during steady-state conditions were discussed via mass transfer rate coefficients (K{sub 1}); K{sub 1} values for surfactant systems are one to two orders of magnitude greater than those for water only (based on extra-micellar concentrations). Two distinct regions were observed for the transient portion of PCE elution; log-linear plots indicate a transition in mass transfer processes for surfactant-enhanced PCE dissolution.
- OSTI ID:
- 126336
- Report Number(s):
- CONF-950402--
- Country of Publication:
- United States
- Language:
- English
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