Factors in Geotropospheric Particle–Gas Transport of Semivolatile Organic Compounds

Testing efforts have shown that semivolatile organic compounds (SVOCs) may occur in solid, liquid, or gas phases under ambient environmental conditions. A study evaluated two classes of SVOCs and two types of particles as part of efforts aimed at identifying potential transport mechanisms to the troposphere. The project examined dicarboximide compounds moving from a soil matrix to the troposphere, and polycyclic aromatic hydrocarbons (PAHs) from airborne particles to the troposphere. Data on dicarboximide were derived from a laboratory chamber developed to assess the headspace flux of the dicarboximide fungicide, vinclozolin, and its three primary degradation products from chamber surfaces, sand, and sterilized and nonsterilized North Carolina Piedmont aquic hapludult soils following application of dicarboximide. Tests implemented for PAHs are detailed.