Main Title |
Sorption and Transport of Hydrophobic Organic Chemicals in Aqueous and Mixed Solvent Systems: Model Development and Preliminary Evaluation. |
Author |
Rao, P. S. C. ;
Hornsby, A. G. ;
Kilcrease, D. P. ;
Nkedi-Kizza, P. ;
|
CORP Author |
Florida Univ., Gainesville.;Robert S. Kerr Environmental Research Lab., Ada, OK. |
Year Published |
1985 |
Report Number |
EPA/600/J-85/201; |
Stock Number |
PB86-117363 |
Additional Subjects |
Organic compounds ;
Mathematical models ;
Sorption ;
Transport properties ;
Environmental surveys ;
Water pollution ;
Solvents ;
Solubility ;
Sediments ;
Soil analysis ;
Reprints ;
Land disposal ;
Hydrophobic organic chemicals
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB86-117363 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
9p |
Abstract |
A theoretical approach, based upon the assumption of predominance of solvophobic interactions, was formulated to quantitatively describe the sorption and transport of hydrophobic organic chemicals (HOC) from aqueous and aqueous-organic-solvent mixtures. In the theoretical approach, solvent-sorbate interactions (solubility) are specifically considered in order to predict sorbate-sorbent interactions (sorption). For HOC sorption from a single solvent, the HOC sorption coefficient was shown to increase loglinearly with the hydrocarbonaceous surface area (HSA) of the sorbate. For HOC sorption from aqueous-organic binary solvent mixtures, the sorption coefficient is predicted to decrease exponentially as the fraction of organic cosolvent increases. This is a direct consequence of increased HOC solubility in the binary solvent. Because sorption and mobility of HOC are inversely related, a decrease in sorption coefficient leads to an enhanced HOC mobility as the fraction of organic cosolvent is increased. A preliminary verification of the theory was performed by an analysis of published data for (i) HOC sorption by soils and sediments from water, (ii) HOC retention by reversed-phase chromatographic sorbents during isocratic elution with methanol-water binary solvent mixture, and (iii) HOC mobility on soil-TLC plates eluted with ethanol-water mixtures. |
Supplementary Notes |
Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK. |
Availability Notes |
Pub. in Jnl. of Environmental Quality, v14 n3 p376-383 Mar 85. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Sorption and Transport of Hydrophobic Organic Chemicals in Aqueous and Mixed Solvent Systems: Model Development and Preliminary Evaluation. |
PUB Date Free Form |
c1985 |
Category Codes |
7D; 68C; 68D; 99F |
NTIS Prices |
Not available NTIS |
Primary Description |
600/15 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
601716545 |
Origin |
NTIS |
Type |
CAT |