Abstract
241Pu concentrations were calculated indirectly in different compartments of the southern Baltic ecosystem by the activity measurements of241Am isotope from the increase of the b-emitting241Pu at 16-18 years after the Chernobyl accident. Enhanced levels of241Pu were observed in all analyzed samples. Maximum values (0.408 and 0.367 mBq. g-1d.w.) of the estimated241Pu concentrations were found in sediments of Internal Puck Bay and Gdansk Bay, respectively, and in the suspended matter from water of Gdansk Bay (77.8 mBq.g-1d.w.). The highest241Pu/239+240Pu activity ratio was found in the suspended matter (1500) and water (140). The241Pu activity of the air dust was very high in April 1986, 3643±34.3 mBq.g-1d.w., and the241Pu/239+240Pu activity ratio was 56, but the highest241Pu/239+240Pu activity ratio of the air dust was measured in August. Then the241Pu concentration in air dust decreased quickly to values similar to those before the Chernobyl accident. This study provides new data for the 241Pu concentrations in various compartments of the Baltic Sea ecosystem.
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