| Title: | Measurements and modeling of absorptive partitioning of volatile organic compounds to painted surfaces |
| Author(s): | Algrim LB; Pagonis D; de Gouw JA; Jimenez JL; Ziemann PJ; |
| Address: | "Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA" |
| ISSN/ISBN: | 1600-0668 (Electronic) 0905-6947 (Linking) |
| Abstract: | "Partitioning to surfaces is an important sink for volatile organic compounds (VOCs) indoors, but the mechanisms are not well understood or quantified. Here, a mass spectrometer was coupled to a portable surface reactor and a flow tube to measure partitioning of VOCs into paint films coated onto glass or wallboard, and their subsequent diffusion. A model was developed to extract values of the effective absorbing organic mass concentration of the film, C(w) , which is a measure of absorption capacity, and VOC diffusion coefficients, D(f) , from VOC time profiles measured during film passivation and depassivation. Values of C(w) agreed well with the value estimated from the paint film mass and flow tube air volume, and D(f) values (also measured using attenuated total reflectance-Fourier transform infrared spectroscopy) correlated well with VOC vapor saturation concentrations, C*, estimated using a group contribution method. The value of these relationships for estimating key parameters that control VOC partitioning into paint and the fate of VOCs indoors was demonstrated using a house model, which indicated that >50% of VOCs with C* |
| Keywords: | "Air Pollution, Indoor/*analysis/statistics & numerical data *Models, Chemical *Paint Volatile Organic Compounds/*analysis absorption diffusion paint partitioning surfaces volatile organic compound;" |
| Notes: | "MedlineAlgrim, Lucas B Pagonis, Demetrios de Gouw, Joost A Jimenez, Jose L Ziemann, Paul J eng Research Support, Non-U.S. Gov't England 2020/02/23 Indoor Air. 2020 Jul; 30(4):745-756. doi: 10.1111/ina.12654. Epub 2020 Mar 6" |
