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Published, Version of Record (VoR)Open Access (License Unspecified), Open
Journal article
Predicting the importance of oxidative aging on indoor organic aerosol concentrations using the two-dimensional volatility basis set (2D-VBS)
Indoor air, v 29(4), pp 616-629
01 Jul 2019
PMID: 30861195
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Organic aerosol (OA) is chemically dynamic, continuously evolving by oxidative chemistry, for instance, via hydroxyl radical (OH) reactions. Studies have explored this evolution (so-called OA aging) in the atmosphere, but none have investigated it indoors. Aging organic molecules in both particle and gas-phases undergo changes in oxygen content and volatility, which may ultimately either enhance or reduce the condensed-phase OA concentration (C-OA). This work models OH-induced aging using the two-dimensional volatility basis set (2D-VBS) within an indoor model and explores its significance on C-OA relative to prior modeling methodologies which neglect aging transformations. Lagrangian, time-averaged, and transient indoor simulations were conducted. The time-averaged simulations included a Monte Carlo procedure and sensitivity analysis, using input distributions typical of U.S. residences. Results demonstrate that indoors, aging generally leads to C-OA augmentation. The extent to which this is significant is conditional upon several factors, most notably temperature, OH exposure, and OA mass loading. Time-averaged C-OA was affected minimally in typical residences (<5% increase). However, some plausible cases may cause stronger C-OA enhancements, such as in a sunlit room where photolysis facilitates significant OH production (similar to 20% increase), or during a transient OH-producing cleaning event (similar to 35% peak increase).
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Details
- Title
- Predicting the importance of oxidative aging on indoor organic aerosol concentrations using the two-dimensional volatility basis set (2D-VBS)
- Creators
- Bryan E. Cummings - Drexel UniversityMichael S. Waring - Drexel University
- Publication Details
- Indoor air, v 29(4), pp 616-629
- Publisher
- Wiley
- Number of pages
- 14
- Grant note
- G-2017-9796 / Alfred P. Sloan Foundation
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000471273100009
- Scopus ID
- 2-s2.0-85065702038
- Other Identifier
- 991019168448104721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Construction & Building Technology
- Engineering, Environmental
- Public, Environmental & Occupational Health