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1

Polonium, uranium and plutonium in the Southern Baltic Sea

100%
Skwarzec B.
Oceanological Studies
|
1997
|
vol. 26
|
issue 1
195-204
EN
This paper presents the results of measurements of polonium, uranium and plutonium radionu-clides in selected components of the southern Baltic ecosystem, as well as the recognition of their accumulation processes in the trophic chain. Investigation on the 210Po, 239+240Pu concentrations in the Baltic biota revealed that these radionuclides are strongly accumulated by some species. Their mean values of the bioaccumulation factor (BCF)* fell within the range from 9?102 to 2.5?104. The Baltic Sea algae, benthic animals and fish concentrated uranium isotopes only to a small degree, and mean BCF values for this element range from 1 to 55, what is several orders of magnitude lower than for polonium and plutonium. Moreover, it was found that fish constitute an important source of 210Po for human.
2

Procedure for radiochemical analysis of 55Fe and 63Ni in selected environmental samples

100%
Skwarzec B.
Oceanological Studies
|
1996
|
vol. 25
|
issue 3
15-23
EN
Radiochemical procedures are described for the determination of iron 55Fe and nickel 63Ni isotopes in environmental samples. The methods were based on the mineralisation of sediment and biological material, coprecipitation and separation of iron and nickel on anion exchange resin. The separated isotopes were electroplated onto a copper disc and their activi-ties was measured by beta spectrometry using an anti-coincidence GM gas flow counter. The proposed procedures were tested on samples from the Baltic Sea. The concentration of 55Fe in reactor water samples falls within the range from 0.15 to 2185 Bq ?1-1,while in brown algae Fucus vesiculosus it lies between 0.13 and 3.50 Bq ? kg-1 dry wt. The 63Ni is non-uniformly distributed within the Baltic fish. More than 95% of the total 63Ni content in cod and herring is located in fillet with skin and scale.
3

Trace metal concentrations and inter-metal associations in antarctic mammals

39%
Szeper P., Szeper K., Pempkowiak J., Skwarzec B., Bojanowski B., Holm E.
Oceanological Studies
|
1993
|
issue 64/3
103-109
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