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DOI | 10.5194/acp-18-1729-2018 |
Volatility measurement of atmospheric submicron aerosols in an urban atmosphere in southern China | |
Cao, Li-Ming1; Huang, Xiao-Feng1; Li, Yuan-Yuan1; Hu, Min2; He, Ling-Yan1 | |
2018-02-06 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:3页码:1729-1743 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Aerosol pollution has been a very serious environmental problem in China for many years. The volatility of aerosols can affect the distribution of compounds in the gas and aerosol phases, the atmospheric fates of the corresponding components, and the measurement of the concentration of aerosols. Compared to the characterization of chemical composition, few studies have focused on the volatility of aerosols in China. In this study, a thermodenuder aerosol mass spectrometer (TD-AMS) system was deployed to study the volatility of non-refractory submicron particulate matter (PM1) species during winter in Shenzhen. To our knowledge, this paper is the first report of the volatilities of aerosol chemical components based on a TD-AMS system in China. The average PM1 mass concentration during the experiment was 42.7 +/- 20.1 mu gm(-3), with organic aerosol (OA) being the most abundant component (43.2% of the total mass). The volatility of chemical species measured by the AMS varied, with nitrate showing the highest volatility, with a mass fraction remaining (MFR) of 0.57 at 50 degrees C. Organics showed semi-volatile characteristics (the MFR was 0.88 at 50 degrees C), and the volatility had a relatively linear correlation with the TD temperature (from the ambient temperature to 200 degrees C), with an evaporation rate of 0.45%degrees C-1. Five subtypes of OA were resolved from total OA using positive matrix factorization (PMF) for data obtained under both ambient temperature and high temperatures through the TD, including a hydrocarbonlike OA (HOA, accounting for 13.5 %), a cooking OA (COA, 20.6 %), a biomass-burning OA (BBOA, 8.9 %), and two oxygenated OAs (OOAs): a less-oxidized OOA (LO-OOA, 39.1 %) and a more-oxidized OOA (MO-OOA, 17.9 %). Different OA factors presented different volatilities, and the volatility sequence of the OA factors at 50 degrees C was HOA (MFR of 0.56) > LO-OOA (0.70) > COA (0.85) approximate to BBOA (0.87) > MO-OOA (0.99), which was not completely consistent with the sequence of their O/C ratios. The high volatility of HOA implied that it had a high potential to be oxidized to secondary species in the gas phase. The aerosol volatility measurement results in this study provide useful parameters for the modeling work of aerosol evolution in China and are also helpful in understanding the formation mechanisms of secondary aerosols. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000424258700006 |
WOS关键词 | SECONDARY ORGANIC AEROSOL ; RESOLVED CHEMICAL-CHARACTERIZATION ; NEW-YORK-CITY ; HIGH-RESOLUTION ; MASS-SPECTROMETRY ; SOURCE APPORTIONMENT ; PARTICULATE MATTER ; INORGANIC AEROSOLS ; AMBIENT AEROSOL ; MIXING STATE |
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/30701 |
专题 | 地球科学 |
作者单位 | 1.Peking Univ, Shenzhen Grad Sch, Sch Environm & Energy, Key Lab Urban Habitat Environm Sci & Technol, Shenzhen 518055, Peoples R China; 2.Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100871, Peoples R China |
推荐引用方式 GB/T 7714 | Cao, Li-Ming,Huang, Xiao-Feng,Li, Yuan-Yuan,et al. Volatility measurement of atmospheric submicron aerosols in an urban atmosphere in southern China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(3):1729-1743. |
APA | Cao, Li-Ming,Huang, Xiao-Feng,Li, Yuan-Yuan,Hu, Min,&He, Ling-Yan.(2018).Volatility measurement of atmospheric submicron aerosols in an urban atmosphere in southern China.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(3),1729-1743. |
MLA | Cao, Li-Ming,et al."Volatility measurement of atmospheric submicron aerosols in an urban atmosphere in southern China".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.3(2018):1729-1743. |
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