Main Title |
Macromolecules Facilitate the Transport of Trace Organics. |
Author |
Bengtsson, G. ;
Enfield, C. G. ;
Lindqvist, R. ;
|
CORP Author |
Lund Univ. (Sweden). Lab. of Ecological Chemistry.;Robert S. Kerr Environmental Research Lab., Ada, OK. |
Year Published |
1987 |
Report Number |
EPA/600/J-87/354; |
Stock Number |
PB88-220108 |
Additional Subjects |
Organic compounds ;
Contaminants ;
Transport properties ;
Soils ;
Reprints ;
Environmental transport
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB88-220108 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
8p |
Abstract |
Macromolecules in the pore fluid of a soil may influence the mobility of hydrophobic compounds by their partitioning to the macromolecule, which moves with, or even faster than, the water. The mobility is described mathematically by a chemical transport model. The significance of the model was demonstrated experimentally in a ground-water infiltration microcosm using dextran, a polysaccharide, as the macromolecule added to lake water pumped through soil columns. Breakthrough curves showed that 500mg/l of dextran enhanced the mobility of hexachlorobenzene by approximately 25 percent. With more hydrophobic macromolecules, such as humic acids, the theory predicts a significantly larger mobility enhancement, a phenomenon that may explain the presence of very hydrophobic pollutants in deep ground-water aquifers. |
Supplementary Notes |
Pub. in Science of the Total Environment, v67 p159-164 1987. Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Macromolecules Facilitate the Transport of Trace Organics. |
PUB Date Free Form |
c1987 |
Category Codes |
99D |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/15 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
824520807 |
Origin |
NTIS |
Type |
CAT |