Single particle time-of-flight mass spectrometry was used to analyze the sources of atmospheric particulate matter during COVID-19 infection in Shanghai from March to May 2022,focusing on the spatio-tem-poral distribution of mobile emission sources,and comparing the monitoring results during the periods of preven-tion and control of COVID-19,the Spring Festival and normal production and daily life before the infection.The results showed that PM2.5 concentration decreased by 23.3％during the prevention and control period compared with that during the Spring Festival and normal production and daily life.The mass concentration of PM2.5 from mobile sources,dust,coal burning and industrial sources,which significantly affected by prevention and emis-sion reduction measures,decreased to different degrees compared with the other two periods.
关键词
细颗粒物/本地排放源谱/单颗粒气溶胶飞行时间质谱法/新冠感染防控/上海
Key words
PM2.5/Local emission source spectrum/Single-particle aerosol time-of-flight mass spectrome-try/COVID-19 infection prevention and control/Shanghai
维普
万方数据