Abstract
Ozone can react homogeneously with unsaturated organic compounds in buildings to generate undesirable products. However, these reactions can also occur on indoor surfaces, especially for low-volatility organics. Conversion rates of ozone with α-terpineol, a representative low-volatility compound, were quantified on surfaces that mimic indoor substrates. Rates were measured for α-terpineol adsorbed to beads of glass, polyvinylchloride (PVC), and dry latex paint, in a plug flow reactor. a newly defined second-order surface reaction rate coefficient, k2, was derived from the flow reactor model. the value of k2 ranged from 0.68 - 10-14 cm 4s-1molecule-1 for α-terpineol adsorbed to PVC to 3.17 - 10-14 cm4s-1molecule -1 for glass but was insensitive to relative humidity. Further, k2 is only weakly influenced by the adsorbed mass but instead appears to be more strongly related to the interfacial activity α-terpineol. the minimum reaction probability ranged from 3.79 - 10-6 for glass at 20% RH to 6.75 - 10-5 for PVC at 50% RH. the combination of high equilibrium surface coverage and high reactivity for α-terpineol suggests that surface conversion rates are fast enough to compete with or even overwhelm other removal mechanisms in buildings such as gas-phase conversion and air exchange. © 2011 American Chemical Society.
Recommended Citation
S. Shu and G. Morrison, "Surface Reaction Rate and Probability of Ozone and Alpha-terpineol on Glass, Polyvinyl Chloride, and Latex Paint Surfaces," Environmental Science and Technology, vol. 45, no. 10, pp. 4285 - 4292, American Chemical Society, May 2011.
The definitive version is available at https://doi.org/10.1021/es200194e
Department(s)
Civil, Architectural and Environmental Engineering
International Standard Serial Number (ISSN)
1520-5851; 0013-936X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Chemical Society, All rights reserved.
Publication Date
15 May 2011
PubMed ID
21517064
