基于高分辨率MARGA分析石家庄市PM2.5水溶性离子特征

第44卷第1期2021年1月

煤炭与化工

Coal and Chemical Industry

Vol.44No.l

Jan.2021

化工分析与检测

基于高分辨率MARGA分析石家庄市PM2.5水溶性离子特征安学文，倪爽英，赵卫凤，王洪华，孟琛琛，宿文康

(河北省生态环境科学研究院，河北石家庄050037)

摘要：2018年12月1日~2019年11月30日利用高时间分辨率在线气体及气溶胶成分监测系统(MARGA)监测石家庄市大气PMz5水溶性离子质量浓度，结合气态污染物和气象监测数据，分析了石家庄全年PM25及其水溶性离子污染特征。结果表明，监测期间PM25水溶性离子年均质量浓度为43.9±43.1jig-in-3,在PM^中占比为58.2%,质量浓度由大到小排序为NO3->S042->NH44>Cl>Ca24>K+>Na+>M g2+o季节变化特征为冬季(70.1刚山刁>秋季(40.3 /xg-m-3)>春季(37.5Aig-m-3)>夏季(28.1胎诚彳)。水溶性离子四季总体均处于“富铁”状态，夏季NH?主要以(NHJjSO。和NH^NOs形式存在，同时还存在部分NH4C1；冬季NH4+主要以(NH4)2S04为主。NO37SO42-比值均值为1.61,可认为监测期间石家庄受移动源影响为主，且秋季影响最大。SOR、NOR小时均值分别为0.31和0.21,存在明显的二次转化。

关键词：MARGA；石家庄；水溶性离子；二次转化

中图分类号：X831文献标识码：B文章编号：2095-5979(2021)01-0145-07

Analysis of PM2.5water-soluble ionic

pollution characteristics in Shijiazhuang based

on high resolution MARGA

An Xuewen,Ni Shuangying,Zhao Weifeng,Wang Honghua,Meng Chenchen,Su Wenkang

(Hebei Provincial Academy Environmental Science,Shijiazhuang050037,China) Abstract:From December1,2018to November30,2019,the high time resolution online gas and aerosol composition monitoring system(MARGA)was used to monitor the mass concentration of atmospheric PM2.5water-soluble ions in Shijiazhuang city,combining with the gaseous pollutants and meteorological monitoring data analyze the pollution characteristics of PM2.5and its water-soluble ions before and after the spring festival.The results showed,that during the monitoring period,the average annual mass concentration of water-soluble ions of PM2.5was43.9±43.1yg'm-3,which accounted for58.2%of PM25,and the order of mass concentration was NO3~>SO42~>NH4+>C1—>Ca2+>K+>Na+>Mg2+.The characteristics of seasonal changes are:winter(70.1口g•m-3)>autumn(40.3/xg•m-3)>spring(37.5Rg•m-3)>sunimer(28.1 /zg•m~3).Water-soluble ions are in the"ammonium-rich**state in all four seasons.In summer,NH4*mainly exists in the :f orm of(NH4)^O4,and NHiNC^,and there is also some NH4CI;in winter,NH4+was mainly(NH^SO^The average value of NCV/SCh2-ratio was 1.61,it can be considered that Shijiazhuang was mainly afiected by mobile sources during the monitoring period,and the impact was greatest in autumn.The hourly average values of SOR and NOR were0.31and0.21 respectively and there was obvious secondary conversion.

Key words:MARGA;water-soluble ions;secondary conversion

0引言

大气细颗粒物（pm Q是造成空气灰霾的主要原因之一，且因其明显有害身体健康，而受到人们的关注。

PM25化学组分特性及反应机制是目前颗粒物

责任编辑：索喜梅DOI：10.19286/i.2021.01.038

作者简介：安学文（1994—）,男，河北安国人，硕士。

引用格式：安学文，倪爽英，赵卫凤，等•基于高分辨率MARGA分析石家庄市水溶性离子特征[J].煤炭与化工，2021,44（1）：145-15L

145