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Single particle characterization of summertime particles in Xi'an (China)
Chen, Yang1,2; Liu, Huanwu3; Yang, Fumo4,5; Zhang, Shumin6; Li, Wentao3; Shi, Guangming1,4; Wang, Huanbo1; Tian, Mi1; Liu, Suixin2; Huang, Rujin2; Wang, Qiyuan2; Wang, Ping2; Cao, Junji2,7
2018-09-15
发表期刊SCIENCE OF THE TOTAL ENVIRONMENT
卷号636页码:1279-1290
文章类型Article
摘要Urban particles in Xi'an during summertime were investigated using a single particle aerosol mass spectrometer (SPAMS). Twelve major particle types were resolved, including EC-Sul-Nit (-Sul stands for sulfate, -Nit for nitrate, and 25% in number fraction), EC(6%), EC-Nit (12%) and, EC-Sul (8%), mixed Elemental and Organic Carbon-Sul-Nit (9%), ECOC-Sul (8%), K-Nit (12%), OC (8%), NaK-Nit (5%), Fe-Nit (5%), Ca-Nit (1%), and Other (1%). Among these particle types, chemical composition, mixing state, and wind-dependent analyses were conducted to investigate their originations and sources. During summertime, traffic-related particles were up to 83% in the SPAMS dataset. Two major originations of urban particles were identified, including the local aging and short-distance transport mainly from the southeast. Size-resolved relative acidity ((sulfate + nitrate) / ammonium) analysis suggested that urban particles were more acidic with an aerodynamic diameter < 0.8 mu m. In diurnal cycle, the strongest relative aerosol acidity occurred between 7:00 and 9:00 in the morning when relative humidity was between 60 and 70%, and the weakest acidity occurred from 13:00-15:00. Among all major particle types, OC and K-Nit had stronger relative aerosol acidity than other types. Mixing state analysis indicated that the organic semi-volatile vapor is favorable to condense on the OC-related particles (OC, ECOC-Sul, and ECOC-Sul-Nit) as evidence that primary organic aerosol (POA) would enhance the secondary organic aerosol (SOA) formation via gas-to-particle phase partitioning when SOA and POA are miscible. Oxalate also tends to be observed in the droplet of OC related particles. In addition, the enrichment of oxalate was observed in Fe-Nit particles. This study would be useful to understand the characterization, mixing state, source, origination, and processing of urban particles during summertime in Xi'an as well as the urban areas in the Guanzhong Basin. (C) 2018 Elsevier B.V. All rights reserved.
关键词Spams Mixing State Aerosol Acidity Source Origination
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.scitotenv.2018.04.388
关键词[WOS]AEROSOL MASS-SPECTROMETRY ; MIXING STATE ; CHEMICAL-COMPOSITION ; OPTICAL-PROPERTIES ; SOURCE APPORTIONMENT ; GUANZHONG BASIN ; EMISSIONS ; TIME ; POLLUTION ; VEHICLES
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:000436599000126
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5340
专题粉尘与环境研究室
作者单位1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
3.Xian Environm Monitor Stn, Xian 710061, Shaanxi, Peoples R China
4.Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Sichuan, Peoples R China
5.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Urban Atmospher Environm, Xiamen 361021, Peoples R China
6.North Sichuan Med Coll, Sch Basic Med Sci, Nanchong 637000, Sichuan, Peoples R China
7.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Shaanxi, Peoples R China
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GB/T 7714
Chen, Yang,Liu, Huanwu,Yang, Fumo,et al. Single particle characterization of summertime particles in Xi'an (China)[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,636:1279-1290.
APA Chen, Yang.,Liu, Huanwu.,Yang, Fumo.,Zhang, Shumin.,Li, Wentao.,...&Cao, Junji.(2018).Single particle characterization of summertime particles in Xi'an (China).SCIENCE OF THE TOTAL ENVIRONMENT,636,1279-1290.
MLA Chen, Yang,et al."Single particle characterization of summertime particles in Xi'an (China)".SCIENCE OF THE TOTAL ENVIRONMENT 636(2018):1279-1290.
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