Radionuclide distribution in components of the Sarbalyk limnetic system (Baraba lowland, Western Siberia). / Ovdina, Ekaterina A.; Strakhovenko, Vera D.; Yermolaeva, Nadezhda I. et al.
In: Russian Journal of Earth Sciences, Vol. 19, No. 6, 6013, 2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Radionuclide distribution in components of the Sarbalyk limnetic system (Baraba lowland, Western Siberia)
AU - Ovdina, Ekaterina A.
AU - Strakhovenko, Vera D.
AU - Yermolaeva, Nadezhda I.
AU - Zarubina, Evgeniya Yu.
AU - Yermolov, Yurij V.
PY - 2019
Y1 - 2019
N2 - Geochemical and mineralogical analysis of the bottom sediment cores of small lakes can be used as the basis for radio-ecological monitoring and environmental protection measures. Here, features of the radionuclide activity distribution in components of the limnetic ecosystems of the central Baraba lowland were studied, and factors affecting radiocesium absence in the bottom sediment of Lake Sarbalyk were identified. Fieldwork included the sampling of limnetic ecosystem components, bottom sediment weighing, and the determination of pH, Eh, TDS and oxygen content. Subsequent laboratory investigation involved the determination of major and trace element concentrations by atomic absorption spectrometry and X-ray fluorescence analysis; mineral composition by X-ray diffractometry (XRD); analysis of sample morphology and composition via scanning electron microscopy; and natural radionuclide and radiocesium content determination by the gamma-spectrometric method. Radiocesium is present in all the studied lake bottom sediments of the central Baraba lowland in the upper horizons, with the exception of Lake Sarbalyk. Limnetic ecosystem components were analyzed using modern analytical methods, considering the distribution features of natural and artificial radionuclides in catchment area soils, tussocks and the bottom sediment of Lake Sarbalyk. The results revealed that the absence of radiocesium in the bottom sediment of Lake Sarbalyk is due to two factors: the characteristics of the lake overgrowth and the sorption of dissolved forms of Cs-137.
AB - Geochemical and mineralogical analysis of the bottom sediment cores of small lakes can be used as the basis for radio-ecological monitoring and environmental protection measures. Here, features of the radionuclide activity distribution in components of the limnetic ecosystems of the central Baraba lowland were studied, and factors affecting radiocesium absence in the bottom sediment of Lake Sarbalyk were identified. Fieldwork included the sampling of limnetic ecosystem components, bottom sediment weighing, and the determination of pH, Eh, TDS and oxygen content. Subsequent laboratory investigation involved the determination of major and trace element concentrations by atomic absorption spectrometry and X-ray fluorescence analysis; mineral composition by X-ray diffractometry (XRD); analysis of sample morphology and composition via scanning electron microscopy; and natural radionuclide and radiocesium content determination by the gamma-spectrometric method. Radiocesium is present in all the studied lake bottom sediments of the central Baraba lowland in the upper horizons, with the exception of Lake Sarbalyk. Limnetic ecosystem components were analyzed using modern analytical methods, considering the distribution features of natural and artificial radionuclides in catchment area soils, tussocks and the bottom sediment of Lake Sarbalyk. The results revealed that the absence of radiocesium in the bottom sediment of Lake Sarbalyk is due to two factors: the characteristics of the lake overgrowth and the sorption of dissolved forms of Cs-137.
KW - Radiogenic isotope geochemistry
KW - small lake
KW - Western Siberia
KW - CHRONOLOGY
U2 - 10.2205/2019ES000681
DO - 10.2205/2019ES000681
M3 - Article
VL - 19
JO - Russian Journal of Earth Sciences
JF - Russian Journal of Earth Sciences
SN - 1681-1208
IS - 6
M1 - 6013
ER -
ID: 25765260