Soil cleanup by in-situ surfactant flushing. VIII. Reclamation of multicomponent contaminated sodium dodecylsulfate solutions in surfactant flushing

Abstract Solvent extraction with hexane has been studied for use in reclaiming contaminated surfactant solutions for reuse in remediation of hazardous sites. The hexane flow rate, sodium dodecylsulfate (SDS) concentration, and contaminant mixture were varied to determine their effects on the removal of multicomponent mixtures of phenanthrene, naphthalene, and biphenyl. Hexane flow rates greater than 60 mL/min were found to remove greater than 80% of phenanthrene and naphthalene after 1.5 hours of extraction time. The mass transfer rate increased until a hexane flow rate of about 60 mL/min was reached and then remained essentially constant. In experiments in which the SDS concentration was varied from 10 to 100 mM in aqueous solutions of mixtures of phenanthrene and naphthalene, the removal percentages for naphthalene were 98, 91, and 82, respectively, for 10, 50, and 100 mM SDS solutions after 2 hours of extraction, and for phenanthrene were 94, 88, and 75%. The mass transfer rates in these experiments in...

[1]  K. H. Oma,et al.  Soil Clean-Up by Surfactant Washing. III. Design and Evaluation of the Integrated Pilot-Scale Surfactant Recycle System , 1993 .

[2]  K. H. Oma,et al.  Soil Clean-Up by Surfactant Washing. II. Design and Evaluation of the Components of the Pilot-Scale Surfactant Recycle System , 1993 .

[3]  J. Underwood,et al.  SOIL CLEAN UP BY IN-SITU SURFACTANT FLUSHING. VI: RECLAMATION OF SURFACTANT FOR RECYCLE , 1993 .

[4]  D. J. Wilson,et al.  Soil Clean up by in-situ Surfactant Flushing. V. Micellar Solubilization of Some Aromatic Contaminants , 1993 .

[5]  Ann N. Clarke,et al.  Soil Clean Up by in-situ Surfactant Flushing. IV. A Two-Component Mathematical Model , 1991 .

[6]  A. N. Clarke,et al.  Soil Clean-Up by Surfactant Washing. I. Laboratory Results and Mathematical Modeling , 1991 .

[7]  K. Raney,et al.  Soil Clean Up by in-situ Surfactant Flushing. III. Laboratory Results , 1989 .

[8]  D. Wilson,et al.  Soil Clean Up by in-situ Surfactant Flushing. II. Theory of Micellar Solubilization , 1989 .

[9]  David J. Wilson,et al.  Soil Clean Up by in-situ Surfactant Flushing. I. Mathematical Modeling , 1989 .

[10]  E. Lissi,et al.  Solubility of n-pentane and chloroform in sodium dodecyl sulfate micelles: Effect of the surfactant concentration and additives , 1984 .

[11]  E. Ruckenstein,et al.  Solubilization of single-component and binary mixtures of hydrocarbons in aqueous micellar solutions , 1984 .

[12]  D. F. Evans,et al.  The mechanism of solubilization in detergent solutions , 1981 .

[13]  D. Nicoli,et al.  Probe effects on micellar size , 1981 .

[14]  B. Carroll.  The kinetics of solubilization of nonpolar oils by nonionic surfactant solutions , 1981 .

[15]  D. F. Evans,et al.  Explaining solubilization kinetics , 1976 .

[16]  I. Kolthoff,et al.  Cosolubilization in Solutions of Potassium Laurate. The Effect of Cosolubilized Alcohols and Hydrocarbons on the Solubilization of Several Aromatic Compounds in Potassium Laurate Solutions. , 1951 .