Chemical formation and source apportionment of PM2.5 at an urban site at the southern foot of the Taihang mountains
文献类型：期刊论文
| 作者 | Liu, Xiaoyong; Wang, Mingshi; Pan, Xiaole; Wang, Xiyue; Yue, Xiaolong; Zhang, Donghui; Ma, Zhigang; Tian, Yu; Liu, Hang; Lei, Shandong |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
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| 出版日期 | 2021-05 |
| 卷号 | 103页码:20-32 |
| ISSN号 | 1001-0742 |
| 关键词 | PM2.5 Chemical components Source identification |
| 英文摘要 | The region along the Taihang Mountains in the North China Plain (NCP) is characterized by serious fine particle pollution. To clarify the formation mechanism and controlling factors, an observational study was conducted to investigate the physical and chemical properties of the fine particulate matter in Jiaozuo city, China. Mass concentrations of the water-soluble ions (WSIs) in PM2.5 and gaseous pollutant precursors were measured on an hourly basis from December 1, 2017, to February 27, 2018. The positive matrix factorization (PMF) method and the FLEXible PARTicle (FLEXPART) model were employed to identify the sources of PM2.5. The results showed that the average mass concentration of PM2.5 was 111 mu g/m(3) during the observation period. Among the major WSIs, sulfate, nitrate, and ammonium (SNA) constituted 62% of the total PM2.5 mass, and NO3- ranked the highest with an average contribution of 24.6%. NH4+ was abundant in most cases in Jiaozuo. According to chemical balance analysis, SO42-, NO3-, and Cl- might be present in the form of (NH4)(2)SO4, NH4NO3, NH4Cl, and KCl. The liquid-phase oxidation of SO2 and NO2 was severe during the haze period. The relative humidity and pH were the key factors influencing SO42- formation. We found that NO3- mainly stemmed from homogeneous gas-phase reactions in the daytime and originated from the hydrolysis of N2O5 in the nighttime, which was inconsistent with previous studies. The PMF model identified five sources of PM2.5: secondary origin (37.8%), vehicular emissions (34.7%), biomass burning (11.5%), coal combustion (9.4%), and crustal dust (6.6%). (C) 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45616]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 作者单位 | 1.Jiaozuo Ecol Environm Monitoring Ctr, Jiaozuo 454003, Henan, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 3.Jiaozuo Environm Sci Res Inst, Jiaozuo 454003, Henan, Peoples R China 4.Henan Polytech Univ, Jiaozuo 454003, Henan, Peoples R China 5.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 6.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xiaoyong,Wang, Mingshi,Pan, Xiaole,et al. Chemical formation and source apportionment of PM2.5 at an urban site at the southern foot of the Taihang mountains[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2021,103:20-32. |
| APA | Liu, Xiaoyong.,Wang, Mingshi.,Pan, Xiaole.,Wang, Xiyue.,Yue, Xiaolong.,...&He, Hong.(2021).Chemical formation and source apportionment of PM2.5 at an urban site at the southern foot of the Taihang mountains.JOURNAL OF ENVIRONMENTAL SCIENCES,103,20-32. |
| MLA | Liu, Xiaoyong,et al."Chemical formation and source apportionment of PM2.5 at an urban site at the southern foot of the Taihang mountains".JOURNAL OF ENVIRONMENTAL SCIENCES 103(2021):20-32. |
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来源：生态环境研究中心
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