襄阳市2020年新冠肺炎疫情期间PM_2.5组分及污染源解析

Analysis of PM_2.5 Components and Pollution Sources during the COVID-19 Epidemic in 2020 in Xiangyang City

摘要: 利用单颗粒气溶胶质谱仪对襄阳市2020年1月7日至4月7日新冠肺炎疫情期间的大气PM_2.5组分及污染来源进行了研究。研究表明，疫情期间受管控措施影响，PM_2.5组分增减变化明显，元素碳、混合碳、重金属占比疫情中有所下降，有机碳颗粒物占比有所增加，疫情后元素碳、重金属、矿物质占比明显回升。污染来源机动车尾气、工业工艺源的占比疫情中有所下降，疫情后工业工艺源、燃煤源、扬尘源占比有较大增加，春节假期期间与去年同期相比燃放烟花爆竹的影响显著减少。

Abstract: A single particle aerosol mass spectrometer (SPAMS) was used to study PM_2.5 components and pollution sources during the COVID-19 outbreak in Xiangyang city from January 7, 2020 to April 7, 2020. The study shows that due to the influence of control measures during the epidemic period, PM_2.5 components increase and decrease significantly. The proportion of elemental carbon, mixed carbon and heavy metals decreased during the epidemic, while the proportion of organic carbon particles increased, and the proportion of elemental carbon, heavy metals and minerals recovered significantly after the epidemic. The proportion of pollution sources such as motor vehicle exhaust and industrial process sources has decreased, and the proportion of industrial process sources, coal burning and dust sources has increased significantly after the epidemic. The impact of setting off fireworks during the Spring Festival holiday has decreased significantly compared with the same period last year.