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Main Title Adsorption of Surfactants (Chapter 7).
Author Brownawell, B. J. ; Chen, H. ; Zhang, W. ; Westall., J. C. ;
CORP Author State Univ. of New York at Stony Brook. Marine Sciences Research Center. ;Oregon State Univ., Corvallis. Dept. of Chemistry.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher 1991
Year Published 1991
Report Number EPA-R-816875; EPA/600/A-92/013;
Stock Number PB92-143809
Additional Subjects Surfactants ; Water pollution effects ; Adsorption ; Land pollution ; Organic compounds ; Waste treatment ; Industrial wastes ; Consumer products ; Chemical properties ; Cation exchanging ; Sulfur organic compounds ; Oxygen organic compounds ; Nitrogen organic compounds ; Sorbents ; Isotherms ; Environmental transport ; Sediments ; Sediment-water interfaces ; Surface reactions ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB92-143809 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 24p
Surfactants are used in increasingly large quantities in a number of consumer and industrial products. Adsorption of surfactants to surfaces of suspended particles affects their removal in waste treatment plants. Adsorption of surfactants on particles affects their distribution, fate, and effects in natural waters. Experiments were conducted to study the properties of surfactant (charge and structure), solution (H(+)), (Ca(2+)), and (Na(+)), and sorbent (e.g., organic carbon and cation exchange capacity) that affect adsorption. The surfactants studied included dodecylpyridinium, homologs of linear alkylbenzenesulfonates, and homologs of 'alcohol ethoxylates' (monoalkyl ethers of poly(ethylene glycol)). Adsorption isotherms were determined for a set of five soils and sediments. Isotherms determined with aqueous-phase concentrations in the submicromolar range were all nonlinear and were described well by the Freundlich equation. The adsorption energies reflected a combination of hydrophobic, electrostatic, and specific chemical interactions. The results of the authors' study indicate that the properties of sorbent and solution that control adsorption are different for different classes of surfactants. The results are discussed relative to adsorption mechanisms and surfactant speciation in natural waters.