|Critical Evaluation of the Diffusion Hypothesis in the Theory of Porous Media Volatile Organic Compound (VOC) Sources and Sinks.
Dunn, J. E. ;
Chen., T. ;
|Arkansas Univ., Fayetteville. Dept. of Mathematical Sciences.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Indoor air pollution ;
Porous materials ;
Mathematical models ;
Stationary sources ;
Organic compounds ;
Least squares method ;
Ethyl benzene ;
Statistical analysis ;
Environmental exposure ;
VOCs(Volatile organic compounds) ;
|Some EPA libraries have a fiche copy filed under the call number shown.
|The paper proposes three alternative, diffusion-limited mathematical models to account for this interaction, using the linear isotherm model as a reference point. Their taxonomy is keyed to the nature of the vapor-sink interface. While the linear isotherm model gave an adequate description of data when a pillow-sink was challenged with ethylbenzene, a new single-parameter diffusion model gave a much improved description of data when the same pillow-sink was challenged with perchloroethylene. A hybrid, sorption/desorption, diffusion-limited model was the only plausible model when a carpet-sink was challenged with ethylbenzene. Some new computational aids, particularly interval-weighted least squares, are introduced in the context of model validation. (Copyright (c) American Society for Testing and Materials 1993.)
|Pub. in Modeling of Indoor Air Quality and Exposure, ASTM STP 1205, p64-80 Sep 93. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
|NTIS Title Notes
|Reprint: Critical Evaluation of the Diffusion Hypothesis in the Theory of Porous Media Volatile Organic Compound (VOC) Sources and Sinks.
|68A; 89B; 57U
|PC A03/MF A01