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Wyświetlanie 1-2 z 2
Tytuł:
Radionuclides of iron (55Fe), nickel (63Ni),polonium (210Po), uranium (234U, 235U, 238U) and plutonium (238Pu, 239+240Pu, 241Pu) in Poland and Baltic Sea environment
Autorzy:
Skwarzec, B.
Strumińska, D.
Boryło, A.
Powiązania:
https://bibliotekanauki.pl/articles/148606.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radionuclides
iron
nickel
polonium
uranium
plutonium
Baltic Sea
Opis:
The paper presents the results of determination of natural [polonium (210Po), uranium (234U, 235U, 238U)] and artificial radionuclides [iron (55Fe), nickel (63Ni), and plutonium (238Pu, 239+240Pu, 241Pu)] in Poland and the southern Baltic Sea ecosystem as well as the recognition of their accumulation process in the trophic chain. All presented results is a summary of long lasting studies realized by the present authors. Results of this study indicated that the principal sources of 55Fe and 63Ni in the Baltic Sea environment is the release from Swedish nuclear power plants. Investigation on the polonium 210Po and plutonium 238Pu, 239+240Pu and 241Pu concentration in Baltic and land biota revealed that these radionuclides are strongly accumulated by some species. Moreover, it was found that fish, mushrooms, cigarettes constitutes important sources of 210Po for people. The Baltic Sea algae, benthic animals and fish concentrate uranium only to a small degree. In Baltic sediments, the concentration of uranium increases with core depth and it is connected with the diffusion of 234U, 235U and 238U from sediments. The values of 234U/238U activity ratio in the sediments indicated that the reduction process of U(VI) to U(IV) and the removing of autogenic uranium from seawater to sediments in the Gdańsk Deep constitutes a small part only.
Źródło:
Nukleonika; 2006, 51,suppl.2; 45-51
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polonium (210Po) and uranium (234U, 238U) in water, phosphogypsum and their bioaccumulation in plants around phosphogypsum waste heap at Wiślinka (northern Poland)
Autorzy:
Skwarzec, B.
Boryło, A.
Kosińska, A.
Radzajewska, S.
Powiązania:
https://bibliotekanauki.pl/articles/148420.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
polonium
uranium
phosphogypsum
plants
water
Wiślinka
Opis:
The principal sources of polonium and uranium radionuclides the Wiślinka area waste dump are phosphorites and phosphogypsum produced by the Phosphoric Fertilizers Industry of Gdańsk. The values of uranium and polonium concentration in water with immediate surroundings of waste heap are considerably higher than in the waters of the Martwa Wisła river. The activity ratio 234U/238U is approximately about one in the phosphogypsum (0.97±0.06 and 0.99±0.04) and in the water of a retention reservoir and a pumping station (0.92±0.01 and 0.99±0.04), while in the water from the Martwa Wisła river is slightly higher than one (1.00±0.07 and 1.06±0.02). The leaching process of uranium and polonium from the phosphogypsum waste heap is responsible for the maximum uranium concentration (1097±6 μg·dm–3 and 1177±6 μg·dm–3) and the high 210Po concentration (131.4±0.9 mBq·dm–3 and 165.7±1.4 mBq·dm–3) in the retention reservoir. The major source of polonium and uranium in plants are wet and dry atmospheric falls gathering soil and air dust from the phosphogypsum waste dump and root system. The highest uranium and polonium concentrations were found in older part of grasses (yellow oatgrass, meadow foxtail, moneywort), exposed to atmospheric falls for a long time. The maximum concentrations of 210Po were characterized for samples of plant root collected at the retention reservoir (150.50±4.97 and 108.55±3.95 Bq·kg–1 dry mass). Polonium and uranium concentrations in water samples of the Martwa Wisła river are relatively low in comparison with the value in the retention reservoir and pumping station near the phosphogypsum waste heap. This suggests that the radionuclides could be leached from the dumping site to the surrounding environment.
Źródło:
Nukleonika; 2010, 55, 2; 187-193
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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