| Autor: |
Strakhovenko, V. D., Ovdina, E. A., Malikova, I. N., Malov, G. I. |
| Předmět: |
|
| Zdroj: |
Geochemistry International; Aug2022, Vol. 60 Issue 8, p792-807, 16p |
| Abstrakt: |
Various components of lake systems located in different landscape zones in southern West Siberia were studied for contents of natural and artificial radionuclides, following the requirements of the state standards (GOST). This work aims at assessing the radiation state of lacustrine sapropel sediments in the Baraba lowland and Kulunda plain, taking into account their natural features and the degree of contamination during nuclear tests. It was found out that the values of the total effective specific activity (As) of natural radionuclides in all of the sapropel lacustrine sediments are significantly lower than the standard value (according to the requirements of the GOST). Some sapropel horizons in the lakes contain excess 137Cs reserves that are twice as high as the global background. Such lakes tend to be spatially constrained to areal traces of radioactive fallouts after nuclear tests at the Semipalatinsk test site and undoubtedly belong to lake systems whose waters and soils on catchments were primarily contaminated with radiocesium. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink