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Chemical formation and source apportionment of PM2.5 at an urban site at the southern foot of the Taihang mountains
Liu, Xiaoyong; Wang, Mingshi; Pan, Xiaole; Wang, Xiyue; Yue, Xiaolong; Zhang, Donghui; Ma, Zhigang; Tian, Yu; Liu, Hang; Lei, Shandong; Zhang, Yuting; Liao, Qi; Ge, Baozhu; Wang, Dawei; Li, Jie; Sun, Yele; Fu, Pingqing; Wang, Zifa; He, Hong
2021-05
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
Volume103Pages:20-32
AbstractThe 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.
Department大气环境与污染控制实验室
KeywordPM2.5 Chemical components Source identification
WOS Research AreaEnvironmental Sciences
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45616
Collection大气环境与污染控制实验室
Affiliation1.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
2.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China
3.Henan Polytech Univ, Jiaozuo 454003, Henan, Peoples R China
4.Jiaozuo Ecol Environm Monitoring Ctr, Jiaozuo 454003, Henan, Peoples R China
5.Jiaozuo Environm Sci Res Inst, Jiaozuo 454003, Henan, Peoples R China
6.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
Recommended Citation
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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