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云南省芒市春季PM2.5水溶性离子特征及来源分析

赵丽多,  任丽红,  李军,  黄顺祥,  李刚,  张佳浩,  张凯

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文章导航 > 环境工程技术学报  > 2021 >  11(6): 1057-1064
赵丽多, 任丽红, 李军, 黄顺祥, 李刚, 张佳浩, 张凯. 云南省芒市春季PM2.5水溶性离子特征及来源分析[J]. 环境工程技术学报, 2021, 11(6): 1057-1064. doi: 10.12153/j.issn.1674-991X.20210073
引用本文: 赵丽多, 任丽红, 李军, 黄顺祥, 李刚, 张佳浩, 张凯. 云南省芒市春季PM2.5水溶性离子特征及来源分析[J]. 环境工程技术学报, 2021, 11(6): 1057-1064. doi: 10.12153/j.issn.1674-991X.20210073
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ZHAO Liduo, REN Lihong, LI Jun, HUANG Shunxiang, LI Gang, ZHANG Jiahao, ZHANG Kai. Characteristics and source analysis of water-soluble ions of PM2.5 during spring in Mang City, Yunnan Province[J]. Journal of Environmental Engineering Technology, 2021, 11(6): 1057-1064. doi: 10.12153/j.issn.1674-991X.20210073
Citation: ZHAO Liduo, REN Lihong, LI Jun, HUANG Shunxiang, LI Gang, ZHANG Jiahao, ZHANG Kai. Characteristics and source analysis of water-soluble ions of PM2.5 during spring in Mang City, Yunnan Province[J]. Journal of Environmental Engineering Technology, 2021, 11(6): 1057-1064. doi: 10.12153/j.issn.1674-991X.20210073
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云南省芒市春季PM2.5水溶性离子特征及来源分析

doi: 10.12153/j.issn.1674-991X.20210073
  • 1.

    环境基准与风险评估国家重点实验室, 中国环境科学研究院

  • 2.

    南京工业大学化学与分子工程学院

  • 3.

    中国科学院大气物理研究所

  • 4.

    陆军防化学院核生化应急技术支持中心

详细信息
    作者简介:

    赵丽多(1995—),女,硕士,主要从事大气颗粒物化学特征研究, Zhaold0202@163.com

    通讯作者:

    任丽红 E-mail: renlh@craes.org.cn

  • 中图分类号: X513

Characteristics and source analysis of water-soluble ions of PM2.5 during spring in Mang City, Yunnan Province

  • 1.

    State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences

  • 2.

    School of Chemistry and Molecular Engineering, Nanjing Tech University

  • 3.

    Institute of Atmospheric Physics, Chinese Academy of Sciences

  • 4.

    Nuclear and Chemical Emergency Technical Support Center, Institute of NBC Defense

More Information
    Corresponding author: REN Lihong E-mail: renlh@craes.org.cn

    摘要
  • 摘要: 为了解云南省芒市春季水溶性离子在PM2.5中的化学特征,于2019年3月11日—4月1日对芒市3个监测站点同步进行PM2.5样品采集,并分析9种水溶性离子($SO_{4}^{2-}$、$NO_{3}^{-}$、Cl-、F-、$NH_{4}^{+}$、K+、Na+、Ca2+和Mg2+),同时采用主成分分析法探讨PM2.5中水溶性离子的主要来源。结果表明:观测期间,芒市PM2.5浓度日均值为25.5~84.1 μg/m3,3个监测站点的PM2.5浓度日均值大部分小于GB 3095—2012《环境空气质量标准》二级标准限值。SNA($SO_{4}^{2-}$、$NO_{3}^{-}$和$NH_{4}^{+}$三者统称)占总水溶性离子的84.1%,说明SNA是PM2.5的重要组成部分。$SO_{4}^{2-}$在总水溶性离子中占比最高(约为52.8%),同时在二次离子中的贡献最大。春季硫氧化速率(SOR)为0.58,说明大气中存在明显的SO2向$SO_{4}^{2-}$的二次转化过程。$SO_{4}^{2-}$/$NO_{3}^{-}$>1,说明固定源对水溶性离子的贡献大于移动源。Cl-与Ca2+、Mg2+的相关性均较好,表明大气颗粒物中Ca2+、Mg2+可能以CaCl2、MgCl2的形式存在;K+与$NO_{3}^{-}$的相关性达0.81,表明K+可能以KNO3的形式存在; $NH_{4}^{+}$和$NO_{3}^{-}$、$SO_{4}^{2-}$主要以(NH4)2SO4、NH4NO3的形式存在。PM2.5中阴离子与阳离子当量浓度之比为0.82,说明PM2.5呈弱碱性。主成分分析结果表明,芒市春季PM2.5中水溶性离子主要来源为扬尘源、生物质燃烧源、二次无机气溶胶。

     

    Abstract: To understand the chemical characteristics of water-soluble ions in PM2.5 in spring in Mang City, Yunnan Province, PM2.5 samples were collected at three monitoring stations in Mang City from March 11 to April 1, 2019 and 9 water-soluble ions ($SO_{4}^{2-}$、$NO_{3}^{-}$、Cl-、F-、$NH_{4}^{+}$、K+、Na+、Ca2+、Mg2+) were analyzed. At the same time, the main sources of water-soluble ions in PM2.5 were discussed by principal component analysis (PCA). The results showed that: The daily mean value of PM2.5 was 25.5-84.1 μg/m3 during the sampling period in spring, most of which less than the level II standard limit of Ambient Air Quality Standards (GB 3095-2012). SNA (collectively referred to $SO_{4}^{2-}$、$NO_{3}^{-}$ and $NH_{4}^{+}$) accounted for 84.1% of the total water-soluble ions, indicating that SNA dominated the main fraction of PM2.5. The proportion of $SO_{4}^{2-}$ in total water-soluble ions was the highest, about 52.8%, and the largest contribution to secondary ions. SOR (sulfur oxidation rate) was 0.58, indicating that there was an obvious secondary conversion process from SO2 to $SO_{4}^{2-}$ in the atmosphere. $SO_{4}^{2-}$/$NO_{3}^{-}$>1 indicated that the contribution of stationary source to water-soluble ions was greater than that of mobile source. The correlation analysis of water-soluble ions showed that Cl - had a good correlation with Ca2+ and Mg2+, indicating that Ca2+、Mg2+ may exist in the forms of CaCl2 and MgCl2 in atmospheric particulate matter. The correlation coefficients between K+ and $NO_{3}^{-}$ was 0.81, which indicated that K+ may exist as KNO3. $NH_{4}^{+}$, $NO_{3}^{-}$ and $SO_{4}^{2-}$ mainly existed in the form of (NH4)2SO4 and NH4NO3. The anion to cation micro-equivalent ratio of PM2.5 was 0.82, indicating that PM2.5 was weakly alkaline. The PCA showed that the main sources of water-soluble ions in PM2.5 in spring in Mang City were dust source, biomass combustion source and secondary inorganic aerosol.

     

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  • 收稿日期:  2021-03-18
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