| Title: | Evolution of aerosol chemistry in Xi'an during the spring dust storm periods: Implications for heterogeneous formation of secondary organic aerosols on the dust surface |
| Author(s): | Ren YQ; Wang GH; Li JJ; Wu C; Cao C; Li J; Wang JY; Ge SS; Xie YN; Li XR; Meng F; Li H; |
| Address: | "State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Key Lab of Geographic Information Science of Ministry of Education of China, School of Geographic Sciences, East China Normal University, Shanghai, 200142, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address: ghwang@geo.ecnu.edu.cn. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Key Lab of Geographic Information Science of Ministry of Education of China, School of Geographic Sciences, East China Normal University, Shanghai, 200142, China. Key Lab of Geographic Information Science of Ministry of Education of China, School of Geographic Sciences, East China Normal University, Shanghai, 200142, China; Department of Chemistry, Analytical and Testing Center, Capital Normal University, Beijing, 100048, China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China" |
| DOI: | 10.1016/j.chemosphere.2018.10.064 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "TSP and 9-stage size-segregated samples were simultaneously collected in Xi'an during the spring of 2013 and analyzed for organic aerosols (OA) on a molecular level. n-Alkanes were the dominant compound class during the whole campaign, followed by fatty acids. High molecular weight (HMW) n-alkanes and fatty acids dominated in the coarse mode particles (>1.1?ª+mum) during the dust event, indicating they were mostly originated from surface soil and plants in the upwind regions. Low-volatile anthropogenic compounds such as benzo(e)pyrene (BeP) and bisphenol A (BPA) dominated in the fine mode particles during the whole campaign. In contrast, semi-volatile anthropogenic compounds such as phenanthrene (Phe) and di-n-butyl phthalates (DBP) showed a bimodal size distribution with a significant increase in the coarse mode during the dust event due to their vaporization from the fine mode particles and the subsequent adsorption on the dust surface. Secondary organic aerosols (SOA) in Xi'an during the dust storm period were predominantly enriched on the coarse particles, which can be ascribed to the adsorption and subsequent oxidation of gas-phase hydrophilic organics on the aqueous-phase of hygroscopic dust surface (e.g., mirabilite). Our work suggested an important role of multiphase reaction in evolution of aerosol chemistry during the dust long-range transport process" |
| Keywords: | Aerosols/analysis/*chemistry Air Pollutants/*analysis/chemistry Alkanes/analysis/chemistry China Dust/*analysis Environmental Monitoring/*methods Fatty Acids/analysis/chemistry Organic Chemicals/chemistry Particle Size *Seasons Volatilization Dust storm H; |
| Notes: | "MedlineRen, Yan Qin Wang, Ge Hui Li, Jian Jun Wu, Can Cao, Cong Li, Jin Wang, Jia Yuan Ge, Shuang Shuang Xie, Yu Ning Li, Xing Ru Meng, Fan Li, Hong eng England 2018/10/20 Chemosphere. 2019 Jan; 215:413-421. doi: 10.1016/j.chemosphere.2018.10.064. Epub 2018 Oct 11" |
