Temporal variability of Pu signatures in a 210Pb-dated Sphagnum peat profile from the Northern Ural, Russian Federation
| Autor: | Edyta Łokas, Yuri Mazei, Anna Cwanek, James A. Milton, Edward A. D. Mitchell, Paweł Gaca |
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| Rok vydání: | 2021 |
| Předmět: |
Anthropogenic radionuclides
Environmental Engineering Peat Sphagnum peat Health Toxicology and Mutagenesis 0208 environmental biotechnology Public Health Environmental and Occupational Health Flux 02 engineering and technology General Medicine General Chemistry 010501 environmental sciences 01 natural sciences Pollution 020801 environmental engineering Latitude Reference level Environmental Chemistry Environmental science Russian federation Physical geography Nuclear weapons testing 0105 earth and related environmental sciences |
| Zdroj: | Chemosphere. 281:130962 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2021.130962 |
| Popis: | The peat archives are one of the stratigraphic records revealing clearly physical, chemical and biological signals of human influence on the Earth System since the 1950s, at least. The presented study was aimed mainly to identify the level and origin of anthropogenic radionuclides such as 238, 239, 240Pu in a 210Pb-dated peat profile derived from the Northern Ural, Russian Federation. As stated, the vertical variability of 240Pu/239Pu isotopic compositions reflects the nuclear weapons testing history with the maximum in the 1960s and small regional impact most likely of high-yielded tests in the 1950s as well as Chinese detonations in the 1970s. Peat accumulations rates were similar to those obtained in adjacent areas, whereas 210Pb flux slightly exceeded the reference level established for adequate latitude belt. |
| Databáze: | OpenAIRE |
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