Citation:

Bowman, F. M., J. R. Odum, S. N. Pandis, AND J. H. Seinfeld. MATHEMATICAL MODEL FOR GAS/PARTICLE PARTITIONING OF SECONDARY ORGANIC AEROSOLS. (R824970). ATMOSPHERIC ENVIRONMENT. American Chemical Society, Washington, DC, 31(23):3921-3931, (1997).

Description:

A dynamic model is developed for gas-particle absorptive partitioning of semi-volatile organic aerosols. The model is applied to simulate a pair of m-xylene/NO_x outdoor smog chamber experiments. In the presence of an inorganic seed aerosol a threshold for aerosol formation is predicted. An examination of characteristic times suggests conditions where an assumption of instantaneous gas--particle equilibrium is justified. Semi-volatile products that are second-generation, rather than first-generation, products of a parent hydrocarbon cause a delay in aerosol formation due to the delayed rate at which the second-generation products are formed. The gas--particle accommodation coefficient is the principal transport parameter and is estimated to have a value between 1.0 and 0.1 for the m-xylene aerosol.

Author Keywords: Absorption; semi-volatile organics; aerosol yields; aerosol growth

Record Details:

Record Type:DOCUMENT( JOURNAL/ PEER REVIEWED JOURNAL)

Product Published Date:01/01/1997

Record Last Revised:12/22/2005

Record ID: 70510

Show Additional Record Data

Document IDs:

EPA Number :R824970