Record Display for the EPA National Library Catalog


Main Title Constancy of Sediment: Water Partition Coefficients of Hydrophobic Organic Pollutants.
Author Gschwend, P. M. ; Wu, S. C. ;
CORP Author Massachusetts Inst. of Tech., Cambridge. Ralph M. Parsons Lab.;Environmental Research Lab., Athens, GA. Office of Research and Development.
Publisher c1985
Year Published 1985
Report Number EPA-R-810472; EPA/600/J-85/550;
Stock Number PB90-106337
Additional Subjects Dissolved organic matter ; Sediments ; Water pollution ; Desorption ; Surface waters ; Graphs(Charts) ; Sorption ; Gas chromatography ; Polychlorinated biphenyls ; Particle resuspension ; Partition coefficient
Library Call Number Additional Info Location Last
NTIS  PB90-106337 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
If precautions are taken to eliminate or account for nonsettling (or nonfilterable) microparticles or organic macromolecules that remain in the aqueous phase during laboratory sorption tests, the observed partition coefficients (Kp or Koc) for a group of model hydrophobic organic compounds (PCBs) are found to remain constant over a wide range of solid-to-solution ratios. Further, the partition coefficients for either sorptive uptake or desorptive release are indistinguishable and confirm the reversible nature of hydrophobic sorption. It is proposed that descriptions of the 'speciation' of hydrophobic compounds in natural waters should include not only dissolved and sorbed-to-sediment fractions but also a component sorbed to nonsettling microparticles or organic macromolecules.