DOI: 10.1016/j.atmosres.2018.01.017
Scopus记录号: 2-s2.0-85044343436
论文题名: Stoichiometry of water-soluble ions in PM2.5: Application in source apportionment for a typical industrial city in semi-arid region, Northwest China
作者: Zhou H. ; Lü C. ; He J. ; Gao M. ; Zhao B. ; Ren L. ; Zhang L. ; Fan Q. ; Liu T. ; He Z. ; Dudagula ; Zhou B. ; Liu H. ; Zhang Y.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 204 起始页码: 149
结束页码: 160
语种: 英语
英文关键词: Dust storm days
; Haze days
; PM2.5
; Source apportionment
; Stoichiometry
; Water-soluble ions
Scopus关键词: Aerosols
; Air quality
; Arid regions
; Calcite
; Carbonate minerals
; Chemical analysis
; Cluster analysis
; Coal combustion
; Coal dust
; Positive ions
; Principal component analysis
; Stoichiometry
; Storms
; Urban growth
; Dust storm
; Haze days
; PM2.5
; Source apportionment
; Water-soluble ions
; Quality control
; aerosol
; atmospheric pollution
; concentration (composition)
; dust storm
; haze
; industrial emission
; ion
; particulate matter
; seasonal variation
; semiarid region
; source apportionment
; stoichiometry
; Baotou
; China
; Nei Monggol
英文摘要: Water-soluble ions (WSIs) are major components of PM2.5 and it is valuable for understanding physical and chemical characteristics, sources, behaviors and formation mechanism of WSIs. Baotou is a traditionally industrial city in semi-arid region and frequently subjected to dust storms from March to May. In recent years, air pollution has been listed as one of the most important environmental problems in Baotou. To investigate the seasonal variations and sources of WSIs in PM2.5, the WSIs including SO4 2−, NO3 −, Cl−, F−, NH4 +, K+, Na+, Ca2+ and Mg2+ were monitored at six urban sites in Baotou. The results showed that high concentrations of Ca2+ and Na+ were found responding to dust storm events, while high concentrations of SO4 2−, NO3 −, NH4 +, K+ and Cl− were observed during haze days. The correlations analysis indicated that excess sulfuric and nitric acid was likely neutralized by carbonate minerals such as calcite, aragonite and dolomite in normal days and cations were fully neutralized during all the sampling periods, while cations were excessive in dust storm days. The concentrations of [NH4 + + SO4 2− + NO3 −], [Na+ + Ca2+ + Mg2+] and [Cl− + K+ + F−] indicated the northwest and southeast region of Baotou presented comparatively high contributions of secondary aerosol and crustal dust, respectively, which were mainly related to the industrial distribution and urbanization process. The cluster analysis, ternary diagram and principal component analysis have a good agreement in source apportionment, where crustal dust sources, secondary aerosol source and the mixture of coal combustion, biomass burning and industrial pollution sources were the main sources of WSIs in PM2.5. The seasonal pattern of sulfur oxidation ratio (SOR) was September > April > November > January, while the nitrogen oxidation ratio (NOR) April > January > November > September in Baotou. This work evaluated the seasonal variation, distribution and source of WSIs on the basis of its stoichiometry in PM2.5, which help to explore the potential sources of these inorganic aerosols and provide scientific suggestion for air quality improvement in Baotou. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108931
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, China; Environmental Monitoring Center of Inner Mongolia, Hohhot, 010011, China; Institute of Environmental Geology, Inner Mongolia University, Hohhot, 010021, China; Tianjin Academy of Environmental Sciences, Tianjin, 300191, China; Institute of Water Research for Pastoral Area, Ministry of Water Resources, Hohhot, 010020, China; Inner Mongolia Agricultural University, Hohhot, 010021, China
Recommended Citation:
Zhou H.,Lü C.,He J.,et al. Stoichiometry of water-soluble ions in PM2.5: Application in source apportionment for a typical industrial city in semi-arid region, Northwest China[J]. Atmospheric Research,2018-01-01,204