Journal article
Indoor transient SOA formation from ozone plus alpha-pinene reactions: Impacts of air exchange and initial product concentrations, and comparison to limonene ozonolysis
Atmospheric environment (1994), v 112
01 Jul 2015
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Abstract
The ozonolysis of reactive organic gases (RUG), e.g. terpenes, generates secondary organic aerosol (SOA) indoors. The SOA formation strength of such reactions is parameterized by the aerosol mass fraction (AMF), a.k.a. SOA yield, which is the mass ratio of generated SOA to oxidized RUG. AMFs vary in magnitude both among and for individual ROGs. Here, we quantified dynamic SOA formation from the ozonolysis of alpha-pinene with 'transient AMFs,' which describe SOA formation due to pulse emission of a RUG in an indoor space with air exchange, as is common when consumer products are intermittently used in ventilated buildings. We performed 19 experiments at low, moderate, and high (0.30, 0.52, and 0.94 h(-1), respectively) air exchange rates (AER) at varying concentrations of initial reactants. Transient AMFs as a function of peak SOA concentrations ranged from 0.071 to 0.25, and they tended to increase as the AER and product of the initial reactant concentrations increased. Compared to our similar research on limonene ozonolysis (Youssefi and Waring, 2014), for which formation strength was driven by secondary ozone reactions, the AER impact for alpha-pinene was opposite in direction and weaker, while the initial reactant product impact was in the same direction but stronger for alpha-pinene than for limonene. Linear fits of AMFs for alpha-pinene ozonolysis as a function of the AER and initial reactant concentrations are provided so that future indoor models can predict SOA formation strength. (C) 2015 Elsevier Ltd. All rights reserved.
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Details
- Title
- Indoor transient SOA formation from ozone plus alpha-pinene reactions: Impacts of air exchange and initial product concentrations, and comparison to limonene ozonolysis
- Creators
- Somayeh Youssefi - Drexel UniversityMichael S. Waring - Drexel University
- Publication Details
- Atmospheric environment (1994), v 112
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- 1055584 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000356190800011
- Scopus ID
- 2-s2.0-84927712794
- Other Identifier
- 991019168698504721
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- Web of Science research areas
- Environmental Sciences
- Meteorology & Atmospheric Sciences