GSTDTAP  > 地球科学
DOI10.5194/acp-17-839-2017
Chemical oxidative potential of secondary organic aerosol (SOA) generated from the photooxidation of biogenic and anthropogenic volatile organic compounds
Tuet, Wing Y.1; Chen, Yunle2; Xu, Lu1; Fok, Shierly1; Gao, Dong3; Weber, Rodney J.4; Ng, Nga L.1,4
2017-01-19
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2017
卷号17期号:2
文章类型Article
语种英语
国家USA
英文摘要

Particulate matter (PM), of which a significant fraction is comprised of secondary organic aerosols (SOA), has received considerable attention due to its health implications. In this study, the water- soluble oxidative potential (OPWS) of SOA generated from the photooxidation of biogenic and anthropogenic hydrocarbon precursors (isoprene, alpha-pinene, beta-caryophyllene, pentadecane, m-xylene, and naphthalene) under different reaction conditions ("RO2 + HO2" vs. "RO2 + NO" dominant, dry vs. humid) was characterized using dithiothreitol (DTT) consumption. The measured intrinsic OPWS-DTT values ranged from 9 to 205 pmol min (-1) mu g (-1) and were highly dependent on the specific hydrocarbon precursor, with naphthalene and isoprene SOA generating the highest and lowest OPWS-DTT values, respectively. Humidity and RO2 fate affected OPWS-DTT in a hydrocarbon specific manner, with naphthalene SOA exhibiting the most pronounced effects, likely due to the formation of nitroaromatics. Together, these results suggest that precursor identity may be more influential than reaction condition in determining SOA oxidative potential, demonstrating the importance of sources, such as incomplete combustion, to aerosol toxicity. In the context of other PM sources, all SOA systems, with the exception of naphthalene SOA, were less DTT active than ambient sources related to incomplete combustion, including diesel and gasoline combustion as well as biomass burning. Finally, naphthalene SOA was as DTT active as biomass burning aerosol, which was found to be the most DTT-active OA source in a previous ambient study. These results highlight a need to consider SOA contributions (particularly from anthropogenic hydrocarbons) to health effects in the context of hydrocarbon emissions, SOA yields, and other PM sources.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000394445600001
WOS关键词AMBIENT PARTICULATE MATTER ; DIESEL EXHAUST PARTICLES ; HUMIC-LIKE SUBSTANCES ; WATER-SOLUBLE PM2.5 ; REACTIVE OXYGEN ; AIR-POLLUTION ; DITHIOTHREITOL DTT ; MASS-SPECTROMETRY ; HIGH-RESOLUTION ; M-XYLENE
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/18356
专题地球科学
作者单位1.Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA;
2.Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA;
3.Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA;
4.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA
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GB/T 7714
Tuet, Wing Y.,Chen, Yunle,Xu, Lu,et al. Chemical oxidative potential of secondary organic aerosol (SOA) generated from the photooxidation of biogenic and anthropogenic volatile organic compounds[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(2).
APA Tuet, Wing Y..,Chen, Yunle.,Xu, Lu.,Fok, Shierly.,Gao, Dong.,...&Ng, Nga L..(2017).Chemical oxidative potential of secondary organic aerosol (SOA) generated from the photooxidation of biogenic and anthropogenic volatile organic compounds.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(2).
MLA Tuet, Wing Y.,et al."Chemical oxidative potential of secondary organic aerosol (SOA) generated from the photooxidation of biogenic and anthropogenic volatile organic compounds".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.2(2017).
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