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DOI | 10.5194/acp-18-15535-2018 |
Chlorine-initiated oxidation of n-alkanes under high-NOx conditions: insights into secondary organic aerosol composition and volatility using a FIGAERO-CIMS | |
Wang, Dongyu S.; Ruiz, Lea Hildebrandt | |
2018-10-30 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:21页码:15535-15553 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Chlorine-initiated oxidation of n-alkanes (C8-12) under high-nitrogen oxide conditions was investigated. Observed secondary organic aerosol yields (0.16 to 1.65) are higher than those for OH-initiated oxidation of C8-12 alkanes (0.04 to 0.35). A high-resolution time-of-flight chemical ionization mass spectrometer coupled to a Filter Inlet for Gases and AEROsols (FIGAERO-CIMS) was used to characterize the gas- and particle-phase molecular composition. Chlorinated organics were observed, which likely originated from chlorine addition to the double bond present on the heterogeneously produced dihydrofurans. A two-dimensional thermogram representation was developed to visualize the composition and relative volatility of organic aerosol components using unit-mass resolution data. Evidence of oligomer formation and thermal decomposition was observed. Aerosol yield and oligomer formation were suppressed under humid conditions (35% to 67% RH) relative to dry conditions (under 5% RH). The temperature at peak desorption signal, T-max, a proxy for aerosol volatility, was shown to change with aerosol filter loading, which should be constrained when evaluating aerosol volatilities using the FIGAERO-CIMS. Results suggest that long-chain anthropogenic alkanes could contribute significantly to ambient aerosol loading over their atmospheric lifetime. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448701900001 |
WOS关键词 | IONIZATION MASS-SPECTROMETRY ; AIR-POLLUTION SOURCES ; CHEMICAL-IONIZATION ; PARTICULATE MATTER ; ALPHA-PINENE ; SOA FORMATION ; OH RADICALS ; TEMPERATURE-DEPENDENCE ; COLLECTION EFFICIENCY ; MOLECULAR-STRUCTURE |
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/25019 |
专题 | 地球科学 |
作者单位 | Univ Texas Austin, McKetta Dept Chem Engn, Austin, TX 78712 USA |
推荐引用方式 GB/T 7714 | Wang, Dongyu S.,Ruiz, Lea Hildebrandt. Chlorine-initiated oxidation of n-alkanes under high-NOx conditions: insights into secondary organic aerosol composition and volatility using a FIGAERO-CIMS[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(21):15535-15553. |
APA | Wang, Dongyu S.,&Ruiz, Lea Hildebrandt.(2018).Chlorine-initiated oxidation of n-alkanes under high-NOx conditions: insights into secondary organic aerosol composition and volatility using a FIGAERO-CIMS.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(21),15535-15553. |
MLA | Wang, Dongyu S.,et al."Chlorine-initiated oxidation of n-alkanes under high-NOx conditions: insights into secondary organic aerosol composition and volatility using a FIGAERO-CIMS".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.21(2018):15535-15553. |
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