Estimation of the share of artificial Po-210 contamination in the ambient air

摘要

In this work, source apportionment for unsupported Po-210 was conducted. The activity size distributions of both supported and unsupported Po-210 in urban aerosols were measured from February to December 2019. The results confirmed that the activity of Po-210 in the atmosphere is significantly increased by additional Po-210 content related to coal combustion by-product releases, especially in the cold winter season. The sources of this content are local emissions and long-range transport processes. Unsupported activity concentrations of Po-210 and weather parameters (temperature, humidity, and wind velocity) were used for source apportionment from three heating systems.