دورية أكاديمية
Gas–particle partitioning of semivolatile organic compounds when wildfire smoke comes to town
| العنوان: | Gas–particle partitioning of semivolatile organic compounds when wildfire smoke comes to town |
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| المؤلفون: | Y. Liang, R. A. Wernis, K. Kristensen, N. M. Kreisberg, P. L. Croteau, S. C. Herndon, A. W. H. Chan, N. L. Ng, A. H. Goldstein |
| المصدر: | Atmospheric Chemistry and Physics, Vol 23, Pp 12441-12454 (2023) |
| بيانات النشر: | Copernicus Publications, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Physics LCC:Chemistry |
| مصطلحات موضوعية: | Physics, QC1-999, Chemistry, QD1-999 |
| الوصف: | Wildfires have become an increasingly important source of organic gases and particulate matter in the western USA. A large fraction of organic particulate matter emitted in wildfires is semivolatile, and the oxidation of organic gases in smoke can form lower-volatility products that then condense on smoke particulates. In this research, we measured the gas- and particle-phase concentrations of semivolatile organic compounds (SVOCs) during the 2017 northern California wildfires in a downwind urban area, using semivolatile thermal desorption aerosol gas chromatography (SV-TAG), and measured SVOCs in a rural site affected by biomass burning using cTAG (comprehensive thermal desorption aerosol gas chromatography mass spectrometry) in Idaho in 2018. Commonly used biomass burning markers such as levoglucosan, mannosan, and nitrocatechols were found to stay predominantly in the particle phase, even when the ambient organic aerosol (OA) was relatively low. The phase partitioning of SVOCs is observed to be dependent on their saturation vapor pressure, while the equilibrium absorption model underpredicts the particle-phase fraction of most of the compounds measured. Wildfire organic aerosol enhanced the condensation of polar compounds into the particle phase but not some nonpolar compounds, such as polycyclic aromatic hydrocarbons. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2441-2023 1680-7316 1680-7324 |
| Relation: | https://acp.copernicus.org/articles/23/12441/2023/acp-23-12441-2023.pdf; https://doaj.org/toc/1680-7316; https://doaj.org/toc/1680-7324 |
| DOI: | 10.5194/acp-23-12441-2023 |
| URL الوصول: | https://doaj.org/article/4fe41c05d527488eb62c8d86adb06da0 |
| رقم الأكسشن: | edsdoj.4fe41c05d527488eb62c8d86adb06da0 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 24412023 16807316 16807324 |
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| DOI: | 10.5194/acp-23-12441-2023 |