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乌鲁木齐市PM2.5中水溶性离子特征及来源分析

石小翠,  帕丽达·牙合甫,  宋思醒

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文章导航 > 环境工程技术学报  > 2021 >  11(6): 1049-1056
石小翠, 帕丽达·牙合甫, 宋思醒. 乌鲁木齐市PM2.5中水溶性离子特征及来源分析[J]. 环境工程技术学报, 2021, 11(6): 1049-1056. doi: 10.12153/j.issn.1674-991X.20210045
引用本文: 石小翠, 帕丽达·牙合甫, 宋思醒. 乌鲁木齐市PM2.5中水溶性离子特征及来源分析[J]. 环境工程技术学报, 2021, 11(6): 1049-1056. doi: 10.12153/j.issn.1674-991X.20210045
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SHI Xiaocui, PALIDA Yahefu, SONG Sixing. Characteristics and source analysis of water-soluble ions in PM2.5 in Urumqi City[J]. Journal of Environmental Engineering Technology, 2021, 11(6): 1049-1056. doi: 10.12153/j.issn.1674-991X.20210045
Citation: SHI Xiaocui, PALIDA Yahefu, SONG Sixing. Characteristics and source analysis of water-soluble ions in PM2.5 in Urumqi City[J]. Journal of Environmental Engineering Technology, 2021, 11(6): 1049-1056. doi: 10.12153/j.issn.1674-991X.20210045
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乌鲁木齐市PM2.5中水溶性离子特征及来源分析

doi: 10.12153/j.issn.1674-991X.20210045

  • 新疆农业大学草业与环境科学学院

详细信息
    作者简介:

    石小翠(1993—),女,硕士研究生,主要研究方向为区域大气污染成因, 1608232639@qq.com

    通讯作者:

    帕丽达·牙合甫 E-mail: 1474672291@qq.com

  • 中图分类号: X513

Characteristics and source analysis of water-soluble ions in PM2.5 in Urumqi City

  • College of Grassland and Environmental Sciences, Xinjiang Agricultural University

More Information
    Corresponding author: PALIDA Yahefu E-mail: 1474672291@qq.com

    摘要
  • 摘要: 为探究乌鲁木齐市采暖期与非采暖期PM2.5中水溶性离子污染特征及其来源,分别于2019年10月、12月开展采样,使用离子色谱仪和电感耦合等离子体发射光谱仪对PM2.5中9种水溶性离子(K+、Na+、Ca2+、Mg2+、$NH_4^+$、$SO_4^{2-}$、$NO_3^-$、Cl-、F-)进行分析测定,并运用主成分分析法和PMF模型对离子进行源解析。结果表明:乌鲁木齐市新疆农业大学、小西门、三屯碑和米东区采样点总水溶性离子浓度平均值分别为(100.8±59.0)、(61.1±18.4)、(53.1±22.5)和(103.1±67.4)μg/m3,占PM2.5的57.9%、56.7%、44.0%和54.1%。其中$NH_4^+$、$ SO_4^{2-}$和$NO_3^-$是PM2.5水溶性离子的主要组分。乌鲁木齐市各采样点的硫氧化率(SOR)和氮氧化率(NOR)均值均大于0.1,说明研究期间,乌鲁木齐市大气环境中存在明显的二次转化过程。主成分分析和PMF分析的结果表明,各采样点水溶性离子主要来源于二次污染物转化、扬尘和生物质燃烧。

     

    Abstract: In order to explore the pollution characteristics and sources of water-soluble ions in PM2.5 during the heating and non-heating periods in Urumqi, PM2.5 samples were collected in October and December, 2019. Nine water-soluble ions, including K+, Na+, Ca2+, Mg2+, $NH_4^+$,$SO_4^{2-}$, $NO_3^-$, Cl-, F-, in PM2.5 were analyzed and determined by using the ion chromatography and inductively coupled plasma (ICP) emission spectrometer. The principal component analysis (PCA) and positive matrix factorization (PMF) models were used to carry out ion source analysis. The results showed that the average mass concentration of total water-soluble ions at sampling points of Xinjiang Agricultural University, Xiaoximen, Santunbei, and Midong District was (100.8±59.0), (61.1±18.4), (53.1±22.5) and (103.1±67.4) μg/m3, respectively, accounting for 57.9%, 56.7%, 44.0% and 54.1% of PM2.5, respectively. $NH_4^+$, $SO_4^{2-}$ and $NO_3^-$ were the main water-soluble ions in PM2.5. The average values of SOR and NOR at each sampling point in Urumqi were higher than 0.1, which indicated that there was an obvious secondary transformation process in the atmospheric during the study period. The results of PCA and PMF analysis indicated that the water-soluble ions at each sampling point mainly originated from secondary conversion, dust and combustion activities.

     

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  • 收稿日期:  2021-02-24
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