||Constancy of Sediment: Water Partition Coefficients of Hydrophobic Organic Pollutants.
Gschwend, P. M. ;
Wu, S. C. ;
||Massachusetts Inst. of Tech., Cambridge. Ralph M. Parsons Lab.;Environmental Research Lab., Athens, GA. Office of Research and Development.
Dissolved organic matter ;
Water pollution ;
Surface waters ;
Gas chromatography ;
Polychlorinated biphenyls ;
Particle resuspension ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||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.
||Pub. in Environmental Science and Technology, v19 n1 p90-96 Jan 85. Sponsored by Environmental Research Lab., Athens, GA. Office of Research and Development.
|NTIS Title Notes
||PC A02/MF A01