Impact of distance from the glacier on the content of 137Cs and 90Sr in the lichen Cetrariella delisei
2020
Saniewski, M. | Wietrzyk-Pełka, P. | Zalewska, T. | Osyczka, P. | Węgrzyn, M.H.
The Arctic region is substantially a pristine area, but this unique part of the globe has also been contaminated by anthropogenic radioactive nuclides, and now there is still measurable activity of anthropogenic isotopes, even though more than 50 years have passed since the main source. Radionuclides in the Arctic, especially ⁹⁰Sr have seldom been studied despite their considerable environmental importance. This manuscript covers the results of ⁹⁰Sr and ¹³⁷Cs measurements in soil and lichen Cetrariella delisei collected from the Svalbard in 2012. In both lichen thalli and surface soils high activities of ⁹⁰Sr and ¹³⁷Cs were recorded and ranged between 3.69 and 28.1 Bq kg⁻¹ ⁹⁰Sr and 5.38–280.1 Bq kg⁻¹¹³⁷Cs in thalli and between 4.53 and 12.78 Bq kg⁻¹dw ⁹⁰Sr and 60.6–426.1 Bq kg⁻¹dw ¹³⁷Cs in surface soil layer. The activity of ⁹⁰Sr and ¹³⁷Cs in lichen thalli was influenced by distance from the glacier. This showed that during radionuclide biomonitoring of particular area with the use of lichens, it is important to take into account influence of environmental variability on radionuclides contents.
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