Natural and anthropogenic radionuclides in airborne particulate samples collected in Barcelona (Spain).
Results for naturally occurring (7)Be, (210)Pb, (40)K, (214)Bi, (214)Pb, (212)Pb, (228)Ac and (208)Tl and anthropogenic (137)Cs in airborne particulate matter in the Barcelona area during the period from January 2001 to December 2005 are presented and discussed. The (212)Pb and (208)Tl, (214)Bi and (214)Pb, (7)Be and (210)Pb radionuclide levels showed a significant correlation with each other, with correlation coefficients of 0.99, 0.78 and 0.69, respectively, suggesting similar origin/behaviour of these radionuclides in the air. Caessium-137 and Potassium-40 were transported to the air as resuspended particle from the soil. The (7)Be and (210)Pb concentrations showed similar seasonal variations, with a tendency for maximum concentrations during the summer months. An inverse relationship was observed between the (7)Be, (210)Pb, (40)K and (137)Cs concentrations and weekly rainfall, indicating washout of atmospheric aerosols carrying these radionuclides.
Vallés
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Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain. isabel.valles@upc.edu
Camacho
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Ortega
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Serrano
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Blázquez
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Pérez
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D000186:Actinium / Q000032:analysis; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D001608:Beryllium / Q000032:analysis; D001729:Bismuth / Q000032:analysis; D007854:Lead / Q000032:analysis; D052638:Particulate Matter / Q000032:analysis*; D011868:Radioisotopes / Q000032:analysis*; D012621:Seasons; D013030:Spain; D013793:Thallium / Q000032:analysis
D000396:Air Pollutants, Radioactive; D052638:Particulate Matter; D011868:Radioisotopes; D007854:Lead; D013793:Thallium; D000186:Actinium; D001608:Beryllium; D001729:Bismuth