Chemical Composition Characteristics and Source Apportionment of PM2.5 During Winter in Taiyuan

被引：9

作者：

Liu S. ^{[1
,2
]}

Ma T. ^{[2
]}

Yang Y. ^{[3
]}

Gao J. ^{[2
]}

Peng L. ^{[1
]}

Cao L.-Y. ^{[3
]}

Pang N.-N. ^{[4
]}

Zhang H.-J. ^{[5
]}

机构：

[1] College of Environment Science and Engineering, North China Electric Power University, Beijing

[2] Chinese Research Academy of Environmental Sciences, Beijing

[3] Taiyuan Environmental Monitoring Station, Taiyuan

[4] College of Chemical Engineering, Beijing University of Chemical Technology, Beijing

[5] Environment Research Institute, Shandong University, Ji'nan

来源：

Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 04期

关键词：

Composition characteristics; PM[!sub]2.5[!/sub; Polluted days; Source apportionment; Taiyuan;

D O I：

10.13227/j.hjkx.201808259

中图分类号：

学科分类号：

摘要：

To study the characteristics and sources of PM2.5 pollution in Taiyuan urban area in winter, PM2.5 and its chemical components (water-soluble ions, carbon components, and trace elements) and gaseous pollutants (SO2, NO2) were monitored by online instruments in January 2017. Combined with meteorological data, the characteristics of PM2.5 and its chemical components were analyzed. Also, source apportionment of PM2.5 was conducted by using positive matrix factorization (PMF). The results showed that the mean mass concentration of PM2.5 on polluted days (239.92 μg•m-3) was 5.70 times as much as that on clean days. The concentrations of the main chemical components of PM2.5 on polluted days, SO42-, NO3-, NH4+, Cl-, OC, and EC, were 7.04, 5.76, 6.51, 5.62, 4.06, and 4.70 times their respective values on clean days. The sulfur oxidation ratios (SOR) and the nitrogen oxidation ratios (NOR) on polluted days were 0.12 and 0.19, respectively, which were higher than those in clean days, indicating that secondary transformation was more significant on polluted days. The results of the PMF source apportionment showed that the contributions of secondary sources (35.06%), coal combustion (30.19%), and vehicle emissions (24.25%) were higher on polluted days than on clean days, with increases of 18.03%, 7.39% and 2.10%, respectively. Thus, air pollution control strategies should pay more attention to controlling secondary source precursors on the basis of controlling the primary emission sources on polluted days. © 2019, Editorial Office of FINE CHEMICALS. All right reserved.

引用

页码：1537 / 1544

页数：7

共 41 条

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