title: The changes in the contents of 137Cs in bottom sediments of some Masurian lakes during 10-15 y observation (Poland).
abstract: The measurements of radioactive caesium contents in bottom sediments were carried out in four lakes. First samples (47) were taken in 1992-95. The repeat sampling (109) was performed from the same places in 2005. We examined eight chosen areas in these lakes. In six of them, we observed statistically significant differences in the level of radioactive caesium. It indicates the permanent decrease in the level of 137Cs. The mean annual decrease in the level of radioactive caesium, taking into consideration the radioactive decay, was from 4.2 to 7.8%. In two areas of the profundal zone, we did not observe statistically significant differences in the level of radioactive caesium (lakes Garbas and Rogale Wielkie). Taking into consideration the radioactive decay of caesium, it means about the appearance of the process of accumulation of 137Cs in these areas.
authors.affiliation: Department of Biophysics, Medical University of Białystok, Mickiewicza 2A, 15-089 Białystok, Poland. jkapala@amb.edu.pl
authors.forename: Jacek
authors.initials: J
authors.lastname: Kapala
authors.forename: Maria
authors.initials: M
authors.lastname: Karpińska
authors.forename: Zenon
authors.initials: Z
authors.lastname: Mnich
authors.forename: Andrzej
authors.initials: A
authors.lastname: Szpak
authors.forename: Robert
authors.initials: R
authors.lastname: Milewski
authors.forename: Dorota
authors.initials: D
authors.lastname: Citko
mesh_terms: D002588:Cesium Radioisotopes / Q000032:analysis*; D004784:Environmental Monitoring; D005618:Fresh Water; D019015:Geologic Sediments / Q000032:analysis*; D011044:Poland; D011847:Radioactive Fallout / Q000032:analysis*; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D002588:Cesium Radioisotopes; D011847:Radioactive Fallout; D014875:Water Pollutants, Radioactive