Main Title |
Sorption of Hydrophobic Organic Compounds by Sediments. |
Author |
Curtis, G. P. ;
Reinhard, M. ;
Roberts, P. V. ;
|
CORP Author |
Stanford Univ., CA. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK. |
Year Published |
1986 |
Report Number |
EPA-R-812462; EPA/600/D-87-049; |
Stock Number |
PB87-145538 |
Additional Subjects |
Sorption ;
Sediments ;
Water ;
Contaminants ;
Organic compounds ;
Solubility ;
Mathematical models ;
Reprints ;
Fate of pollutants
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB87-145538 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
16p |
Abstract |
Thermodynamic and kinetic principles which govern the uptake of nonionic, hydrophobic organic chemicals by sediments in aqueous systems are summarized. Sorption onto organic-rich sediments can be modeled as a process where the hydrophobic compound partitions into the organic matter associated with the sediments analogous to the partitioning in the octanol water system resulting in a linear free energy relationship between the two partition coefficients. The influence of dissolved organic matter can be accounted for by considering a binding isotherm between the hydrophobic solute and dissolved macromolecules. Adsorption at the mineral-water interface becomes important when the adsorbate contains polar functional groups and/or when the adsorbate contains quite small concentrations of organic matter. Sorption can require more than a month to reach equilibrium for highly hydrophobic compounds, but can be adequately described by a radial diffusion model accompanied by the retarding influence of sorption. |
Supplementary Notes |
Pub. in Geochemical Processes at Mineral Surfaces, ACS (American Chemical Society) Symposium Series 323, p191-216 1986. Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Sorption of Hydrophobic Organic Compounds by Sediments. |
PUB Date Free Form |
c1986 |
Category Codes |
68 |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/15 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
709318487 |
Origin |
NTIS |
Type |
CAT |