太原市采暖季PM<sub>2.5</sub>组分特征及重污染事件分析

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摘要针对2017~2018年采暖季太原市PM_2.5及其水溶性离子、碳质组分和无机元素开展在线观测，结合气象数据分析不同污染水平下的组分特征.分析表明，2017~2018年太原市采暖季细颗粒物主要化学成分为SO₄^2-、NO₃^-、NH₄⁺、Cl^-、Ca²⁺、OC、EC，且呈现OC>SO₄^2- > NO₃^- > NH₄⁺ > Cl^- > Ca²⁺ > EC的趋势，随污染水平增长最多的是二次无机物；优良、轻度污染和重污染3种污染水平下OC、EC相关系数分别为0.69、0.66、0.55，N/S分别为1.06、1.29、0.93，表明随着污染水平的提高，OC和EC的来源一致性逐步变差，且排放源虽仍处于氮排放源（移动源和工业源）和硫排放源（燃煤源）的共同控制，但硫排放源贡献率显著升高.重污染事件分析表明太原市重污染应对过程中不仅需要加强机动车、工业源等污染源的管控，更需要重点加强燃煤管控.

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	倪登峰
	刘素
	曹力媛
	王杰
	高健
	解静芳
	郭英哲

关键词 ：太原, PM_2.5, 采暖季, 组分特征, 重污染

Abstract：Based on the on-line observation of PM_2.5 and its water-soluble ions, carbonaceous components and inorganic elements during the heating period of 2017~2018 in Taiyuan City, the composition characteristics under different pollution levels were analyzed combinedwith meteorological data. The analysis indicated that the dominant chemical components of fine particles in the heating period of Taiyuan City from 2017 to 2018 were SO₄^2-, NO₃^-, NH₄⁺, Cl^-, Ca²⁺, OC and EC, which showed the trend of OC > SO₄^2- > NO₃^- > NH₄⁺ > Cl^- > Ca²⁺ > EC. And secondary inorganics increased the most with the pollution level. The correlations between OC and EC under three pollution levels of excellent, light and heavy pollution were 0.69, 0.66 and 0.55, respectively,and N/S were 1.06, 1.29 and 0.93, respectively, indicating that with the increase of pollution levels, the consistency of OC and EC sources gradually deteriorated. In addition,the emission sources were still under the synergetic control of nitrogen emission sources (mobile and industrialsources) and sulfur (coalburning) emission sources, however, the contribution rate of sulfur emission sources increased significantly. The analysis of heavy pollution events showed that in the process of responding to heavy pollution inTaiyuan, it is necessary not only to strengthen the control of emission sources such as vehicles exhaust、industrial sources, etc, but more importantly the control of coal burning.

Key words： Taiyuan PM_2.5 heating season composition characteristics heavy pollution

收稿日期: 2019-12-31

PACS:

X513

基金资助:国家自然科学基金资助项目（91544226）

通讯作者: 高健,研究员,gaojian@craes.org.cn;解静芳,教授,xiejf@sxu.edu.cn E-mail: gaojian@craes.org.cn;xiejf@sxu.edu.cn

作者简介: 倪登峰(1996-),男,浙江永康人,山西大学硕士研究生,主要从事大气环境综合观测方面研究.

引用本文:

倪登峰, 刘素, 曹力媛, 王杰, 高健, 解静芳, 郭英哲. 太原市采暖季PM_2.5组分特征及重污染事件分析[J]. 中国环境科学, 2020, 40(7): 2821-2828. NI Deng-feng, LIU Su, CAO Li-yuan, WANG Jie, GAO Jian, XIE Jing-fang, GUO Ying-zhe. Composition characteristics of PM_2.5 and heavy pollution events in Taiyuan City during heating season. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(7): 2821-2828.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2020/V40/I7/2821

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