Record Display for the EPA National Library Catalog


Main Title First Order Mass Balance Model for the Sources, Distribution and Fate of PCBs in the Environment.
Author Whitmore., Frank C. ;
CORP Author Versar, Inc., Springfield, Va.;Environmental Protection Agency, Washington, D.C. Office of Toxic Substances.
Year Published 1977
Report Number 474-5G; EPA-68-01-3259; EPA/460/6-77/006;
Stock Number PB-270 220
Additional Subjects Air pollution ; Water pollution ; Chlorine organic compounds ; Lake Michigan ; Great Lakes ; Mathematical models ; Distribution(Property) ; Mass transfer ; Sediments ; Adsorption ; Fallout ; Sources ; Estimates ; Atmospheric models ; Evaporation ; Concentration(Composition) ; Input ; Polychlorinated biphenyls ; Biphenyl/chloro ; Bioaccumulation
Library Call Number Additional Info Location Last
NTIS  PB-270 220 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 180p
A first order model for the sources, distribution and fate of PCBs in an aquatic system is described. The model is then applied to Lake Michigan and to the Great Lakes Systems. The results obtained from the model indicate that atmospheric sources are a major PCB input to the Great Lakes. Because of the great water mass of the lakes, the PCB concentration appears to be storage controlled rather than loss controlled. The major loss mechanisms are found to be co-evaporation from the airwater interface and entrapment with sediments. It is estimated that if all inputs or PCBs rate Lake Michigan were eliminated, it would take more than 70 years for the concentration of PCBs in the water to decrease by 50 per cent.