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http://dx.doi.org/10.1016/j.net.2022.07.005

137Cs, 40K and 210Po in abiotic components of aquatic ecosystems two rivers in the Can Gio biosphere reserve, Vietnam  

Ilya G. Sidorov (A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS)
Nataliya N. Tereshchenko (A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS)
Andrey A. Korotkov (A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS)
Olga D. Chuzhikova-Proskurnina (A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS)
Nguyen Trong Hiep (Vietnam-Russia Tropical Center Southern Branch No 3)
Aleksandr V. Trapeznikov (Institute of Plant and Animal Ecology of RAS)
Publication Information
Nuclear Engineering and Technology / v.54, no.11, 2022 , pp. 4265-4271 More about this Journal
Abstract
Determination of 137Cs, 40K and 210Po in water, bottom sediments and suspended matter of river systems of the Can Gio Biosphere Reserve, Vietnam was carried out. The average activity concentration of 137Cs in waters of Ca Gau and Long Tau was 0.89 ± 0.14 and 1.08 ± 0.15 Bq m-3 and was comparable to the levels of this radioisotope in waters of the East Sea. The activity concentration of 137Cs in bottom sediments was 2.23 ± 0.81 and 3.63 ± 1.24 Bq kg-1. The activity concentration of 137Cs in water and bottom sediments could be characterized as low. So, the water areas of the Ca Gau and Long Tau rivers could be attributed to areas with insignificant pollution by technogenic radionuclides. The 210Po activity concentration in bottom sediments of the Ca Gau and Long Tau rivers ranged from 9.2 ± 1.2 to 25.5 ± 2.1 Bq kg-1, which is typical for river bottom sediments. Such values indicate the absence of anthropogenic enhancement of the entry of this radionuclide into the Can Gio river systems. The 40K activity concentration varied within 467 ± 42-651 ± 39 Bq kg-1 and represented typical values of potassium content in the bottom sediments of coastal water bodies, subject to a significant influence of the lithogenic component of suspended matter.
Keywords
Environment radioactivity; $^{137}Cs$ $^{40}K$ and $^{210}Po$; Water; Suspended matter; Sediment; Concentration factor; Sediment inventory; Can Gio rivers;
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