Atmospheric deposition of radionuclides has been investigated in many studies from the aspects of both
radiation protection and geochemistry. The present study, carried out in the city of Málaga, in the southeast
of Spain, focuses on the assessment of the bulk depositional fluxes of three natural radionuclides: 7Be
(cosmogenic origin), and 210Pb and 40K (crustal origin). These three radionuclides are useful markers of
particles arising from their respective sources. To obtain fundamental information of atmospheric
transportation, sedimentation and geological process of particulate matter, a long-term monitoring of
atmospheric deposition has been carried out in Málaga from January 2005-December 2016. Samples of
bulk deposition were collected on a monthly basis on a stainless steel tray from January 2005 to
December 2016. Afterwards, a volume of 6 L of the bulk deposition was reduced via evaporation to 1 L
approximately and transferred to a Marinelli geometry container for gamma counting. Additionally,
aerosols samples were collected weekly in cellulose membrane filters of 0.8μm pore size and 47mm
diameter with an air sampler lodged in an all-weather sampling station, situated on the roof near the bulk
rain collector. Gamma counting of the aerosols and bulk deposition samples was performed using an
intrinsic germanium coaxial detector, Re-Ge-type (CANBERRA). This study describes the results and
then discusses characteristics of atmospheric deposition of mentioned radionuclides with respect to
seasonal variations and dependency on controlling factors. The depositional fluxes of all radionuclides
showed a clear seasonal trend with summer minimum and high values in wintertime.
