Chemometric methods for source apportionment of 210Pb, 210Bi and 210Po for 10 years of urban air radioactivity monitoring in Lodz city, Poland
2019
Długosz-Lisiecka, Magdalena
The radionuclide activity concentrations of ²¹⁰Pb and its decay products ²¹⁰Bi and ²¹⁰Po were measured in 271 total suspended particulate samples collected from 2008 to 2017 in the center of Lodz city, Poland. Natural and anthropogenic contributions to the observed activities of ²¹⁰Pb, ²¹⁰Bi and ²¹⁰Po radionuclides were estimated. Corrected aerosol residence times were determined for this purpose. After the closure of one of the coal-fired power plants located in the center of the city, a substantial reduction in emission of these radionuclides was observed. For proper identification of the origins of these radionuclides, the concentrations of ⁴ K and ⁷Be as well as sulfur dioxide (SO₂₎, and total air particulate matter were measured. Principal component analysis and cluster analysis were conducted for source apportionment of ²¹⁰Pb, ²¹⁰Bi and ²¹⁰Po in urban air.
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