||Deposition of Semi-Volatile Air Toxic Pollutants to the Great Lakes: A Regional Modeling Approach.
Ching, J. K. S. ;
Binkowski, F. S. ;
Clark, T. L. ;
||Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div.
Great Lakes ;
Air pollution ;
Acid rain ;
Aromatic hydrocarbons ;
Organic chlorine compounds ;
Parametric analysis ;
Mathematical models ;
RPM(Regional Particulate Model) ;
Semi-volatile organic compounds ;
Dry deposition ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
A modeling approach is described that will be able to predict wet and dry deposition of airborne semi-volatile organic toxic compounds applicable on a regional scale. In principle, these compounds cycle between the aerosol or the gas phases depending primarily on their vapor pressure. The study outlines an approach using as its modeling framework, the U.S. Environmental Protection Agency's Regional Particulate Model (RPM). The size distribution and the chemical composition available from the RPM can provide the sites for the condensation or volatilization of these semi-volatiles. Parametric attachment formulation for these pollutants are discussed and a requirements plan presented. It is demonstrated that the approach can handle a wide range of volatility characteristic of various compounds. Examples of the use of the RPM for organoclorines and persistent aromatic hydrocarbon pollutants are presented.