Temporal variations of iodine-127, potassium-40 and technetium-99 concentrations in Fucus serratus in the English Channel
| Autor: | L. Jeanmaire, F. Patti, Ph. Pinton, M. Garcet, Michel Masson |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
geography
geography.geographical_feature_category biology Fucus serratus Release point Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health chemistry.chemical_element Potassium-40 Seasonality biology.organism_classification Iodine medicine.disease Annual cycle Pollution Analytical Chemistry Oceanography chemistry Nuclear Energy and Engineering Technetium-99 medicine Environmental science Radiology Nuclear Medicine and imaging Channel (geography) Spectroscopy |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry Letters. 153:311-311 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | The trends of127I,40K, and99Tc levels were measured for several years inFucus serratus collected in 3 different Channel coastal stations. The results demonstrated cyclic seasonal variations of the levels, with maximum values in winter and minimum values in summer (ranging between 2 and 3). Ash levels evolved with a similar cycle, which allowed to estimate that the cycle thus observed was related to the alga biological activity and not to the releases. Trends of99Tc levels were more complex. At Roscoff, a station little exposed to the releases, levels varied with the same annual cycle as natural elements. At Herquemoulin, a station close to the release point, the trend was mainly related to the released activities with a delay of about 1 year. At Wimereux, a distant station more strongly affected by sea currents, the cycle appeared in 1983 and 1984 but was hidden in 1985 and 1986 by the arrival of waters more strongly labelled because of the larger releases that occurred in 1985 (26 TBq), instead of 12 TBq in 1983 and 1984. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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