Radioactivity of anthropogenic and natural radionuclides in marine sediments of the Chaun Bay, East Siberian Sea

被引：3
|
作者：
Ulyantsev, Alexander [1 ]
Ivannikov, Sergei [2 ]
Bratskaya, Svetlana [2 ]
Charkin, Alexander [3 ]
机构：
[1] Russian Acad Sci, Shirshov Inst Oceanol, Moscow 117997, Russia
[2] Russian Acad Sci, Inst Chem, Far Eastern Branch, Vladivostok 690022, Russia
[3] Russian Acad Sci, Ilichev Pacific Oceanol Inst, Far Eastern Branch, Vladivostok 690041, Russia
来源：
MARINE POLLUTION BULLETIN | 2023年 / 195卷
关键词：
Arctic; Marine sediments; Natural radionuclides; Radiocesium; Gamma-spectrometry; Grain size; BOTTOM SEDIMENTS; CS-137; RADIOCESIUM; FUKUSHIMA; TH-232; RA-226; RIVER; K-40; CONTAMINATION; TRANSPORT;
D O I：
10.1016/j.marpolbul.2023.115582
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Natural radioactive isotopes serve as a useful proxy of geological and geochemical processes in marine environment, while radiocesium serves as an indicator of man-made contamination. Monitoring of natural and anthropogenic radioactivity under conditions of the climate changes in the Arctic region is of high importance in investigations of this natural system. For the first time, we report the data on spatial distribution of natural (232Th, 226Ra, 40K) and anthropogenic (137Cs) radionuclide activities in the marine sediments from Chaun Bay (East Siberian Sea). The measured activity concentrations varied in the range 23.7-77.9 (mean 39.2) Bq kg-1 for 232Th, 16.5-39.3 (mean 26.6) Bq kg -1 for 226Ra, 535-991 (mean 726) Bq kg-1 for 40K, and 0.5-4.7 (mean 2.0) Bq kg -1 for 137Cs. The radiocesium level in the sediments showed no local sources of anthropogenic pollution in the Chaun Bay, while the average activity concentration of 40K was 1.8 times higher than worldwide.
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页数：9
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