Presence of Natural and Artificial Radionuclides in the Soil and Terrestrial Fauna of Livingston Island, Antarctica

Hristozova, Milena

doi:10.5593/sgem2015/b51/s20.090

Cited by 1 publication

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“…The highest was the content of the natural radioisotope K-40 -from 132±13 to 165±15 Bq/kg for 2012 and from 230±20 to 360±40 Bq/kg for 2022. The amount was comparable to that in the soil -between 190±15 and 280±20 Bq/kg [15] and that in volcanic ash -180±10 Bq/kg [21].…”

Section: Resultsmentioning

confidence: 51%

“…Its amount in the soil can be many times less than that in plants. [15]. When compared with additional ours studies of the remaining representatives of the island flora: lichens, algae and grass (Poa Annua -a naturalized anthropophyte) [16], was established that mosses are the best indicator of cesium-137 contamination.…”

Section: Resultsmentioning

confidence: 99%

“…[15]. When compared with additional ours studies of the remaining representatives of the island flora: lichens, algae and grass (Poa Annua -a naturalized anthropophyte) [16], was established that mosses are the best indicator of cesium-137 contamination. In the rest of the plant species, its amount in the measured samples was respectively: ≤1, 1.0±0.4 and 2±0.5 Bq/kg.…”

Section: Resultsmentioning

confidence: 99%

“…In the rest of the plant species, its amount in the measured samples was respectively: ≤1, 1.0±0.4 and 2±0.5 Bq/kg. [16].…”

Section: Resultsmentioning

confidence: 99%

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Content of natural and man-made radionuclides in Antarctic mosses

2023

RAD Conference Proceedings

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Mosses are collectors of anthropogenic pollution and are suitable as bioindicators for the content of heavy metals and radionuclides in the air. Due to their lack of a real root system, the main way nutrients are supplied to them is through air moisture. Airborne substances are absorbed and retained in the moss, even when these plants are thousands of kilometers from the source of pollution. In regard to radionuclides, mosses are very indicative. The subject of the research are mosses from Livingstone Island, South Shetland Islands, Antarctica. The presence of natural and man-made radionuclides is investigated. The presence of Natural and man-made radionuclides were determined by means of gamma-spectrometry. The content of Pb-210, U-238, Ra-226, Pb-214, Bi-214, Th-232, K-40, Cs-137 was determined. The activity of cesium-137 is between 3.5±1.2 and 11±2 Bq/kg, for Pb-210 - between 68±7 и 163±15 Bq/kg. Results from samples taken in 2012 and 2022 are compared. This allows to assess the current state of the Antarctic ecosystem and to ascertain changes over a 10-year period. The research confirms that even the most distant points on the globe are contaminated with radionuclides.

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Section: Resultsmentioning

confidence: 51%

Section: Resultsmentioning

confidence: 99%