Record Display for the EPA National Library Catalog


Main Title Macromolecular Transport of Hydrophobic Contaminants in Aqueous Environments.
Author Enfield, C. G. ; Bengtsson, G. ;
CORP Author Robert S. Kerr Environmental Research Lab., Ada, OK. ;Lund Univ. (Sweden). Lab. of Ecological Chemistry.
Year Published 1988
Report Number EPA/600/J-88/044;
Stock Number PB88-219191
Additional Subjects Soil science ; Water pollution ; Ground water ; Organic wastes ; Mathematical models ; Molecules ; Dextran ; Sands ; Clay soils ; Porosity ; Soil properties ; Reprints ; Environmental transport ; Land pollution
Library Call Number Additional Info Location Last
NTIS  PB88-219191 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
The mobility of a model macromolecule, blue dextran, was compared under laboratory conditions to the mobility of tritiated water through a sandy soil. The blue dextran eluted from the soil prior to the tritiated water. The phenomenon was compared to exclusion chromatography where molecules are separated by size with the largest eluting first and each molecule flowing through a different portion of the total porosity. When the soil was amended with a mixture of kaolinite and bentonite clay the porosity occupied by the macromolecule was decreased. The implications to hydrophobic chemical transport based on the presence and mobility of a macromolecule were evaluated from a theoretical basis. Macromolecules should increase the relative mobility of slightly mobile compounds more than they increase the relative mobility of highly mobile compounds. Very hydrophobic compounds should show greater mobility under natural conditions than predicted, ignoring the presence of dissolved organic carbon.