Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Use of Cationic Surfactants to Modify Soil Surfaces to Promote Sorption and Retard Migration of Hydrophobic Organic Compounds.
Author Wagner, J. ; Chen, H. ; Brownawell, B. J. ; Westall., J. C. ;
CORP Author Oregon State Univ., Corvallis. Dept. of Chemistry.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1994
Year Published 1994
Report Number EPA-R-816875; EPA/600/J-94-120;
Stock Number PB94-158797
Additional Subjects Environmental transport ; Land pollution ; Surfactants ; Cations ; Soil treatment ; Immobilization ; Reprint ; Remedial action ; Adsorption ; Aquifer materials ; Surfaces ; Organic compounds ; Feasibility studies ; Hydrophobic organic compounds ; Pyridinium/dodecyl
Library Call Number Additional Info Location Last
NTIS  PB94-158797 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/01/1994
Collation 10p
Cationic surfactants can be used to modify surfaces of soils and subsurface materials to promote adsorption of hydrophobic organic compounds (HOC). Batch and column experiments were performed to investigate the phenomenon with the cationic surfactant dodecylpyridinium (DP), a series of chlorobenzenes as representative HOC, and a low organic carbon aquifer material (Lula). The adsorption isotherm of DP was highly nonlinear; at micromolar concentrations, DP was adsorbed strongly but not irreversibly; at millimolar concentrations, adsorption was relatively weak. Distribution ratios of the chlorobenzenes varied nonlinearly with DP loading. The elution of chlorobenzenes from columns packed with DP-treated aquifer material was examined; a transport model based on the results of the batch experiments and the local equilibrium assumption yielded an acceptable approximation for the coelution of DP and HOC from the column. It is concluded that treatment of surfaces with cationic surfactants shows promise as a means of promoting HOC sorption in a variety of treatment processes. (Copyright (c) 1994 American Chemical Society.)