Monitoring Application of Single Particle Spectrum from Local Emission Source During COVID-19 Infection in Shanghai
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.
PM2.5Local emission source spectrumSingle-particle aerosol time-of-flight mass spectrome-tryCOVID-19 infection prevention and controlShanghai
万方数据
维普
