Full Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
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 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 180p
Abstract 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.
NTIS Title Notes Final rept..
PUB Date Free Form 27 Jul 77
Category Codes 13B; 68D; 68A
NTIS Prices PC A09/MF A01
Primary Description 500/00
Document Type NT
Cataloging Source NTIS/MT
Control Number 323721932
Origin NTIS
Type CAT