| 摘要: |
| 利用单颗粒气溶胶质谱仪(SPAMS)于2018年1月1日—2019年12月31日对上海市浦东新区环境空气PM2.5开展高时间分辨化学成分监测。结果表明，2019年监测点空气质量总体优于2018年，AQI达标率由74.8%升高至86.6%。通过对PM2.5成分分类，最终确定了8类颗粒物，相较于2018年，2019年富钾颗粒物升幅较为明显，左旋葡聚糖、重金属和元素碳有小幅增加，其余各组分相对减少。对PM2.5排放源分类分析显示，机动车尾气源占比>25%，其中2018年3月、2018年7月、2019年2和3月贡献超过40%；二次无机源和燃煤源呈现一定的季节变化特点，整体秋冬季高于春夏季，2019年燃煤源占比较2018年下降了41%；工业排放源2018年5和10月、2019年1和5月占比相对较高，其余各月份占比相对较为稳定。 |
| 关键词: 细颗粒物 在线气溶胶质谱仪 化学组分 源解析 浦东 |
| DOI： |
| 分类号:X513 |
| 文献标识码:B |
| 基金项目:上海市浦东新区科委基金资助项目（PKJ2019-C02） |
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| Annual Variation Trend of Chemical Components and Sources of Fine Particulate Matter in Regional Atmosphere |
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YANG Fan, XU Jian-ping, WENG Zu-feng, MA Jia, LI Mei1,2,3
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1.Environmental Monitoring Station of Pudong New District, Shanghai 201200,China;2. Guangzhou Hexin Instrument Co.Ltd., Guangzhou,Guangdong 510530,China;3. Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou，Guangdong 510632,China
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| Abstract: |
| Single particle aerosol mass spectrometer (SPAMS) was used to monitor the chemical composition of fine particles in ambient air in Pudong new area in Shanghai with high time resolution from January 1th, 2018 to December 31th, 2019. The results showed that the overall air quality at the monitoring sites in 2019 was better than that in 2018, with the AQI compliance rate rising from 74.8% to 86.6%. Through the classification of fine particulate matter components, eight types of particulate matter were finally determined. Compared with 2018, potassium riched particulate matter increased significantly in 2019, meanwhile levoglucosan, heavy metals and elemental carbon increased slightly, while the other components decreased. According to the classification and analysis of fine particulate emission sources, vehicle exhaust emissions on average accounted for more than 25%, in which over 40% contributed by March 2018, July 2018, February 2019 and March 2019. The secondary inorganic source and coal burning source showed seasonal variation, with autumn and winter higher than spring and summer, and the coal burning source of 2019 decreased by 41% comparing with that in 2018. The proportion of industrial emission sources was relatively high in May 2018, October 2018, January 2019 and May 2019, while the proportion in the other months was relatively stable. |
| Key words: PM2.5 Online SPAMS Chemical composition Source analysis Pudong |
