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RECORD NUMBER: 257 OF 285

OLS Field Name OLS Field Data
Main Title Surfactant-Enhanced Solubilization of Residual Dodecane in Soil Columns. 1. Experimental Investigation.
Author Pennell, K. D. ; Abriola, L. M. ; Weber, W. J. ;
CORP Author Michigan Univ., Ann Arbor. Dept. of Civil and Environmental Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.;Ford Motor Co., Dearborn, MI.
Publisher 1993
Year Published 1993
Report Number EPA-R-818647; EPA/600/J-94/052;
Stock Number PB94-137023
Additional Subjects Surface active substances ; Liquids ; Transport ; Sorption ; Soil chemistry ; Flushing ; Polyoxyethylene ; Concentration(Composition) ; Flow distribution ; Velocity ; Solvents ; Solubility ; Experimental design ; Reprints ; Soil columns ; Deodecane ; Remediation ; Solubilization
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB94-137023 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 05/14/1994
Collation 10p
Abstract
The solubilization of dodecane by polyoxyethylene (20) sorbitan monooleate, a nonionic surfactant, was investigated as a potential means of recovering nonaqueous-phase liquids from contaminated aquifers. Residual saturations of dodecane were established by injecting 14C-labeled dodecane into water-saturated soil columns and displacing the free product with water. Flushing with a 43 g/l surfactant solution increased the concentration of dodecane in the column effluent by 5 orders of magnitude. However, effluent dodecane concentrations were considerably less than the equilibrium value of 3500 mg/L measured in batch studies. Subsequent column experiments conducted at several flow velocities and with periods of flow interruption confirmed the existence of rate-limited, rather than instantaneous, solubilization of residual dodecane. The results of the study demonstrate the sizable capacity of surfactant solutions to enhance the recovery of residual dodecane, even under conditions of rate-limited solubilization.