GSTDTAP  > 地球科学
DOI10.5194/acp-18-18101-2018
Chemical composition of isoprene SOA under acidic and non-acidic conditions: effect of relative humidity
Nestorowicz, Klara1; Jaoui, Mohammed2; Rudzinski, Krzysztof Jan1; Lewandowski, Michael2; Kleindienst, Tadeusz E.2; Spolnik, Grzegorz3; Danikiewicz, Witold3; Szmigielski, Rafal1
2018-12-20
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2018
卷号18期号:24页码:18101-18121
文章类型Article
语种英语
国家Poland; USA
英文摘要

The effect of acidity and relative humidity on bulk isoprene aerosol parameters has been investigated in several studies; however, few measurements have been conducted on individual aerosol compounds. The focus of this study has been the examination of the effect of acidity and relative humidity on secondary organic aerosol (SOA) chemical composition from isoprene photooxidation in the presence of nitrogen oxide (NOx). A detailed characterization of SOA at the molecular level was also investigated. Experiments were conducted in a 14.5m(3) smog chamber operated in flow mode. Based on a detailed analysis of mass spectra obtained from gas chromatography-mass spectrometry of silylated derivatives in electron impact and chemical ionization modes, ultra-high performance liquid chromatography/electrospray ionization/time-of-flight high-resolution mass spectrometry, and collision-induced dissociation in the negative ionization modes, we characterized not only typical isoprene products but also new oxygenated compounds. A series of nitroxy-organosulfates (NOSs) were tentatively identified on the basis of high-resolution mass spectra. Under acidic conditions, the major identified compounds include 2-methyltetrols (2MT), 2-methylglyceric acid (2mGA), and 2MT-OS. Other products identified include epoxydiols, mono-and dicarboxylic acids, other organic sulfates, and nitroxy-and nitrosoxy-OS. The contribution of SOA products from isoprene oxidation to PM2.5 was investigated by analyzing ambient aerosol collected at rural sites in Poland. Methyltetrols, 2mGA, and several organosulfates and nitroxy-OS were detected in both the field and laboratory samples. The influence of relative humidity on SOA formation was modest in non-acidic-seed experiments and stronger under acidic seed aerosol. Total secondary organic carbon decreased with increasing relative humidity under both acidic and non-acidic conditions. While the yields of some of the specific organic compounds decreased with increasing relative humidity, others varied in an indeterminate manner from changes in the relative humidity.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000454052600003
WOS关键词SECONDARY ORGANIC AEROSOL ; REACTIVE UPTAKE ; 2-METHYLGLYCERIC ACID ; INDUCED DISSOCIATION ; OXIDATION-PRODUCTS ; UNITED-STATES ; ORGANOSULFATES ; PHOTOOXIDATION ; MODEL ; DESULFATION
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/17242
专题地球科学
作者单位1.Polish Acad Sci, Environm Chem Grp, Inst Phys Chem, PL-01224 Warsaw, Poland;
2.US EPA, 109 TW Alexander Dr, Res Triangle Pk, NC 27711 USA;
3.Polish Acad Sci, Inst Organ Chem, Mass Spectrometry Grp, PL-01224 Warsaw, Poland
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GB/T 7714
Nestorowicz, Klara,Jaoui, Mohammed,Rudzinski, Krzysztof Jan,et al. Chemical composition of isoprene SOA under acidic and non-acidic conditions: effect of relative humidity[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(24):18101-18121.
APA Nestorowicz, Klara.,Jaoui, Mohammed.,Rudzinski, Krzysztof Jan.,Lewandowski, Michael.,Kleindienst, Tadeusz E..,...&Szmigielski, Rafal.(2018).Chemical composition of isoprene SOA under acidic and non-acidic conditions: effect of relative humidity.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(24),18101-18121.
MLA Nestorowicz, Klara,et al."Chemical composition of isoprene SOA under acidic and non-acidic conditions: effect of relative humidity".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.24(2018):18101-18121.
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