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Determination of the mean aerosol residence times in the atmosphere and additional (210)Po input on the base of simultaneous determination of (7)Be, (22)Na, (210)Pb, (210)Bi and (210)Po in urban air.

Długosz-Lisiecka M, Bem H - J Radioanal Nucl Chem (2012)

Bottom Line: The significant differences in the activities of (210)Pb, (210)Bi, (210)Po and cosmogenic (7)Be and (22)Na radionuclides in the urban aerosol samples collected in the summers 2010 and 2011 in the Lodz city of Poland were observed.Simultaneous measurement of these radionuclides, after a simple modification of the one compartment model, allows us to calculate both: the corrected aerosol residence times in the troposphere (1 ÷ 25 days) and in the lower stratosphere (103 ÷ 205 days).The relative input of the additional sources (beside of the (222)Rn decay in the air) to the total activity concentrations of (210)Pb, (210)Bi and (210)Po radionuclides in the urban air, plays a substantial role (up to 97% of the total activity) only in the case of (210)Po.

View Article: PubMed Central - PubMed

Affiliation: Institute of Applied Radiation Chemistry, Technical University of Lodz, Zeromskiego Street 116, 90-924 Lodz, Poland.

ABSTRACT

The significant differences in the activities of (210)Pb, (210)Bi, (210)Po and cosmogenic (7)Be and (22)Na radionuclides in the urban aerosol samples collected in the summers 2010 and 2011 in the Lodz city of Poland were observed. Simultaneous measurement of these radionuclides, after a simple modification of the one compartment model, allows us to calculate both: the corrected aerosol residence times in the troposphere (1 ÷ 25 days) and in the lower stratosphere (103 ÷ 205 days). The relative input of the additional sources (beside of the (222)Rn decay in the air) to the total activity concentrations of (210)Pb, (210)Bi and (210)Po radionuclides in the urban air, plays a substantial role (up to 97% of the total activity) only in the case of (210)Po.

No MeSH data available.


Related in: MedlinePlus

Values of the additional ΔAPo activities are plotted against 7Be activities in Lodz aerosol samples
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Related In: Results  -  Collection


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Fig1: Values of the additional ΔAPo activities are plotted against 7Be activities in Lodz aerosol samples

Mentions: However, the relative importance of each of these sources (including plant decomposition) may be different for urban air. Apart from soil resuspension, the sources of the additional 210Po and 210Bi activities—X, in the case of Lodz can be emissions from the three coal fired power stations located within the city, as well as stratospheric injections. The stratospheric contribution can be appraised by checking the possible correlations between X = ΔAPo and the surface air activity of the cosmogenic radionuclides 7Be or 22Na produced in the stratosphere–troposphere border. As is evident from Fig. 1, such a correlation does not exist.Fig. 1


Determination of the mean aerosol residence times in the atmosphere and additional (210)Po input on the base of simultaneous determination of (7)Be, (22)Na, (210)Pb, (210)Bi and (210)Po in urban air.

Długosz-Lisiecka M, Bem H - J Radioanal Nucl Chem (2012)

Values of the additional ΔAPo activities are plotted against 7Be activities in Lodz aerosol samples
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4514680&req=5

Fig1: Values of the additional ΔAPo activities are plotted against 7Be activities in Lodz aerosol samples
Mentions: However, the relative importance of each of these sources (including plant decomposition) may be different for urban air. Apart from soil resuspension, the sources of the additional 210Po and 210Bi activities—X, in the case of Lodz can be emissions from the three coal fired power stations located within the city, as well as stratospheric injections. The stratospheric contribution can be appraised by checking the possible correlations between X = ΔAPo and the surface air activity of the cosmogenic radionuclides 7Be or 22Na produced in the stratosphere–troposphere border. As is evident from Fig. 1, such a correlation does not exist.Fig. 1

Bottom Line: The significant differences in the activities of (210)Pb, (210)Bi, (210)Po and cosmogenic (7)Be and (22)Na radionuclides in the urban aerosol samples collected in the summers 2010 and 2011 in the Lodz city of Poland were observed.Simultaneous measurement of these radionuclides, after a simple modification of the one compartment model, allows us to calculate both: the corrected aerosol residence times in the troposphere (1 ÷ 25 days) and in the lower stratosphere (103 ÷ 205 days).The relative input of the additional sources (beside of the (222)Rn decay in the air) to the total activity concentrations of (210)Pb, (210)Bi and (210)Po radionuclides in the urban air, plays a substantial role (up to 97% of the total activity) only in the case of (210)Po.

View Article: PubMed Central - PubMed

Affiliation: Institute of Applied Radiation Chemistry, Technical University of Lodz, Zeromskiego Street 116, 90-924 Lodz, Poland.

ABSTRACT

The significant differences in the activities of (210)Pb, (210)Bi, (210)Po and cosmogenic (7)Be and (22)Na radionuclides in the urban aerosol samples collected in the summers 2010 and 2011 in the Lodz city of Poland were observed. Simultaneous measurement of these radionuclides, after a simple modification of the one compartment model, allows us to calculate both: the corrected aerosol residence times in the troposphere (1 ÷ 25 days) and in the lower stratosphere (103 ÷ 205 days). The relative input of the additional sources (beside of the (222)Rn decay in the air) to the total activity concentrations of (210)Pb, (210)Bi and (210)Po radionuclides in the urban air, plays a substantial role (up to 97% of the total activity) only in the case of (210)Po.

No MeSH data available.


Related in: MedlinePlus