银川市PM<sub>2.5</sub>中水溶性离子污染特征与来源分析

李慧; 王淑兰; 张敬巧; 王涵; 张玉龙; 靳燕; 王平

doi:10.12153/j.issn.1674-991X.20200247

银川市PM_2.5中水溶性离子污染特征与来源分析

doi: 10.12153/j.issn.1674-991X.20200247

李慧^1,,
王淑兰^1,*, ,,
张敬巧¹,
王涵¹,
张玉龙²,
靳燕²,
王平²

1.
中国环境科学研究院
2.
宁夏环境监测中心站

详细信息

作者简介:
李慧(1988—),女,工程师,硕士,主要从事大气颗粒物污染特征及来源解析研究, lihui@craes.org.cn

通讯作者:
王淑兰 E-mail: wangsl@craes.org.cn

中图分类号: X513
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出版历程
- 收稿日期: 2020-10-15
- 刊出日期: 2021-07-20

Pollution characterization and source analysis of water-soluble ions in PM_2.5 of Yinchuan City

1.
1. Chinese Research Academy of Environmental Sciences
2.
2. Ningxia Environmental Monitoring Centre

More Information

Corresponding author: WANG Shulan E-mail: wangsl@craes.org.cn

摘要

摘要: 为明确银川市PM_2.5中水溶性离子季节变化特征,于2016年秋冬季和2017年春夏季在银川市开展PM_2.5样品采集,分析PM_2.5中9种水溶性离子(Na⁺、 $NH 4 +$ 、K⁺、Mg²⁺、Ca²⁺、F^-、Cl^-、 $NO 3 -$ 、 $SO 4 2 -$ )。结果表明:PM_2.5中9种水溶性离子平均浓度和为(23.5±16.8)μg/m³,占PM_2.5的24.1%,并呈现秋冬高、春夏低的特征,浓度水平为 $SO 4 2 -$ > $NO 3 -$ > $NH 4 +$ >Cl^->Ca²⁺>K⁺>Na⁺>Mg²⁺>F^-,其中SNA( $SO 4 2 -$ 、 $NO 3 -$ 和 $NH 4 +$ )占总离子浓度的80.3%,占PM_2.5的20.2%。重污染日SNA对PM_2.5的贡献比非重污染日增加1.7个百分点,说明银川市PM_2.5浓度越高,二次污染越严重。观测期间银川市阳离子当量浓度(CE)/阴离子当量浓度(AE)平均值为1.4±0.8,春季、夏季、秋季和冬季CE/AE平均值分别为2.8±1.1、2.0±0.4、1.0±0.2和1.1±0.2,表明春季和夏季PM_2.5中碱性无机阳离子的贡献较大,秋季和冬季阴阳离子基本平衡。主成分分析结果表明,二次无机源、工业源和扬尘源是银川市PM_2.5 中水溶性离子的主要来源。后向轨迹聚类分析结果显示,观测期间污染气团主要来源于南部,PM_2.5浓度较高,来源于南部的气团受二次污染源的影响较大。
- 银川市 /
- PM_2.5 /
- 水溶性离子 /
- 来源
Abstract: PM_2.5 samples were collected in Yinchuan City in autumn and winter of 2016 and spring and summer of 2017, and nine kinds of water-soluble ions (Na⁺, $NH 4 +$ , K⁺, Mg²⁺, Ca²⁺, F^-, Cl^-, $NO 3 -$ , $SO 4 2 -$ ) in PM_2.5 were analyzed to study the seasonal variation characteristics of water-soluble ions in PM_2.5. The results showed that the sum of the average concentration of nine water-soluble ions in PM_2.5 was (23.5±16.8) μg/m³, accounting for 24.1% of PM_2.5. The concentration of water-soluble ions showed the characteristics of high values in autumn and winter, and low values in spring and summer. The concentration order from high to low was $SO 4 2 -$ > $NO 3 -$ > $NH 4 +$ > Cl^-> Ca²⁺> K⁺> Na⁺> Mg²⁺> F^-. The proportion of SNA ( $SO 4 2 -$ , NO $NO 3 -$ an $dNH 4 +$ ) to the total ion concentration was 80.3%, and that to PM_2.5 was 20.2%. The contribution of SNA to PM_2.5 on heavy pollution days was 1.7 percentage points higher than that on non-heavy pollution days, which indicated that the higher the PM_2.5 concentration, the more serious the secondary pollution in the city. During the observation period, the average CE/AE of Yinchuan City was 1.4±0.8, and the average CE/AE of spring, summer, autumn and winter was 2.8±1.1, 2.0±0.4, 1.0±0.2 and 1.1±0.2, respectively, indicating that in spring and summer the contribution of basic inorganic cations to PM_2.5 was greater, and the cation and anion in autumn and winter were basically balanced. The results of the principal component analysis showed that the secondary inorganic sources, industrial sources and dust sources were the main sources of water-soluble ions in PM_2.5 of the city. The backward trajectory cluster analysis showed that the polluted air mass mainly came from the south during the observation period, and the particle concentration was higher. The air mass from the south was greatly influenced by the secondary pollution sources.
- Yinchuan City /
- PM_2.5 /
- water-soluble ions /
- sources

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银川市PM_2.5中水溶性离子污染特征与来源分析

doi: 10.12153/j.issn.1674-991X.20200247

作者简介:
李慧(1988—),女,工程师,硕士,主要从事大气颗粒物污染特征及来源解析研究, lihui@craes.org.cn

通讯作者:
王淑兰 E-mail: wangsl@craes.org.cn

计量

Pollution characterization and source analysis of water-soluble ions in PM_2.5 of Yinchuan City

Corresponding author: WANG Shulan E-mail: wangsl@craes.org.cn

计量

目录

留言板

银川市PM2.5中水溶性离子污染特征与来源分析

doi: 10.12153/j.issn.1674-991X.20200247

作者简介: 李慧(1988—),女,工程师,硕士,主要从事大气颗粒物污染特征及来源解析研究, lihui@craes.org.cn

通讯作者: 王淑兰 E-mail: wangsl@craes.org.cn

计量

出版历程

Pollution characterization and source analysis of water-soluble ions in PM2.5 of Yinchuan City

Corresponding author: WANG Shulan E-mail: wangsl@craes.org.cn

计量

出版历程

目录

银川市PM_2.5中水溶性离子污染特征与来源分析

作者简介:
李慧(1988—),女,工程师,硕士,主要从事大气颗粒物污染特征及来源解析研究, lihui@craes.org.cn

通讯作者:
王淑兰 E-mail: wangsl@craes.org.cn

Pollution characterization and source analysis of water-soluble ions in PM_2.5 of Yinchuan City