| 引用本文: | HUANG He-xian, DING Hua, YIN Fu-rong, MA Jia, CHEN Yang, YANG Kai.Analysis of PM2.5 Chemical Compositions and Sources in Changsha City by Single Particle Aerosol Mass Spectrometry in Autumn[J].Environmental Monitoring and Forewarning,2021,13(4):40~46 |
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| 摘要: |
| 2019年10月12日—11月25日，使用单颗粒气溶胶飞行时间质谱仪（SPAMS）在位于长沙市的湖南省生态环境厅点位进行了为期45 d的定点监测。结果表明，监测期间长沙市总体空气质量小时级别优、良天气占比为80.3%。长沙市首要污染物为PM2.5，其主要来源为机动车尾气源，二次无机源次之，工业工艺源排在第三位，占比分别为27.4%，21.5%和17.4%。整体来看，监测期间PM2.5质量浓度的升高大多伴随着以上3种污染源颗粒物的同步升高。机动车尾气源具有明显的早高峰，工业工艺源、生物质燃烧源和餐饮源夜间占比增加。在偏东方向气团主导下，工业工艺源和燃煤源贡献最大；在东北方向气团主导下，PM2.5质量浓度最高，且机动车尾气源占比最高。 |
| 关键词: 细颗粒物 在线源解析 单颗粒气溶胶飞行时间质谱仪 机动车尾气 二次无机源 长沙市 |
| DOI： |
| 分类号:X513 |
| 基金项目:湖南省环保科研课题基金资助项目(2017018) |
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| Analysis of PM2.5 Chemical Compositions and Sources in Changsha City by Single Particle Aerosol Mass Spectrometry in Autumn |
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HUANG He-xian, DING Hua, YIN Fu-rong, MA Jia, CHEN Yang, YANG Kai1,2,3
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1.Hunan Ecological and Environmental Monitoring Center, State Environmental Protection Key Laboratory of Monitoring for Heavy Metal Pollutants, Changsha, Hunan 410000, China;2. Power China Zhong Nan Engineering Corporation Limited, Changsha, Hunan 410014, China;3. Kunshan Hexin Mass Spectrometry Technology Corporation Limited, Kunshan, Jiangsu 215300, China
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| Abstract: |
| A single particle aerosol mass spectrometer (SPAMS) was applied to analyze the sources of fine particulate matters (PM2.5) in ambient air of Changsha city. The data were acquired from the sampling site which is located in Ecology and Environment Department of Hunan during the period of 12th October to 25th November, 2019. As the results showed, during the monitoring period, the percentage of hourly AQI in good or moderate level was 80.3% in Changsha. The primary pollutant in Changsha city was PM2.5, which mainly came from vehicle exhaust, followed by secondary inorganic sources, and then industrial process sources. The increase of PM2.5 mass concentration was accompanied by the proportion increment of particulate matter from the above three sources, accounting for 27.4%, 21.5% and 17.4%, respectively.Vehicle emission sources had a clear morning peak, and industry emission sources, biomass combustion sources, and catering sources accounted for an increased proportion at night. The PM2.5 mass concentration and the vehicle emission source accounted for the highest proportions under the northeast direction. The industry emission source and coal combustion source accounted for the highest proportions under the eastward air mass. |
| Key words: PM2.5 On line source apportionment SPAMS Vehicle echaust Secondary inorganic source Changsha City |
