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CRITICAL EVALUATION OF THE DIFFUSION HYPOTHESIS IN THE THEORY OF POROUS MEDIA VOLATILE ORGANIC COMPOUND (VOC) SOURCES AND SINKS
Citation:
Dunn, J. E. AND T. Chen. CRITICAL EVALUATION OF THE DIFFUSION HYPOTHESIS IN THE THEORY OF POROUS MEDIA VOLATILE ORGANIC COMPOUND (VOC) SOURCES AND SINKS. Chapter 5, American Society for Testing and Materials, West Conshohocken, PA, , 64-80, (1993).
Impact/Purpose:
ASTM STP Paper
Description:
The paper proposes three alternative, diffusion-limited mathematical models to account for volatile organic compound (VOC) interactions with indoor sinks, using the linear isotherm model as a reference point. (NOTE: Recent reports by both the U.S. EPA and a study committee of the Commission of the European Communities have alluded to diffusion mechanisms that may play a role in these interactions.) The taxonomy of the alternative models 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. 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.
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CRITICAL EVALUATION OF THE DIFFUSION HYPOTHESIS IN THE THEORY OF POROUS MEDIA VOLATILE ORGANIC COMPOUND (VOC) SOURCES AND SINKS
CRITICAL EVALUATION OF THE DIFFUSION HYPOTHESIS IN THE THEORY OF POROUS MEDIA VOLATILE ORGANIC COMPOUND (VOC) (PDF, NA pp, 2753 KB, about PDF)