タグ「sea」
Title: Long Term Temporal Changes of 90Sr and 137Cs in Seawater, Bottom Sediment and Marine Organism Samples – from the Chernobyl Accident to Immediately after the Fukushima Accident –
Author: Shinji OIKAWA, Teruhisa WATABE, Hyoe TAKATA, Chiyoshi SUZUKI, Motokazu NAKAHARA, Jun MISONOO
Reference: BUNSEKI KAGAKU, Vol. 62 (2013) No. 6 p. 455-474
Doi:http://dx.doi.org/10.2116/bunsekikagaku.62.455
Keywords: radiochemistry, 90Sr, 137Cs, seawater, sediment, marine organism
Abstract: A radioactivity survey program was launched in 1983 to determine the background levels of artificial radionuclides, such as 90Sr and 137Cs in the marine environment off commercial nuclear power stations. In this paper, we report on the long-term temporal changes of 90Sr and 137Cs in seawater, bottom sediment and marine organism samples. Both 90Sr and 137Cs have been detected since the beginning of the program in the seawater samples.
ＵＲＬ：https://www.jstage.jst.go.jp/article/bunsekikagaku/62/6/62_455/_article/-char/ja/
Author: BAKUNOV N.A., SAVATYUGIN L.M., BOL’SHIYANOV D.YU.
Reference: Gazette “WATER RESOURCES“, 2007
ISSN: 0097-8078
DOI: 10.1134/S0097807807020078
Keywords: 90sr, river
Abstract: Describes the migration of 90sr from soil to rivers in the northern European and Asian territories above Russia.
URL: http://elibrary.ru/item.asp?id=13544966
Author: Miroshnikov A. Yu.
Reference: Gazette “ГЕОЭКОЛОГИЯ, ИНЖЕНЕРНАЯ ГЕОЛОГИЯ, ГИДРОГЕОЛОГИЯ, ГЕОКРИОЛОГИЯ“ (Geoecology, engineering geology, hydrogeology, geocryology), 2012
ISSN: 0869-7803
DOI: 556.545
Keywords: sea, 137cs, bottom sediments, river, cesium, transfer
Abstract: The article presents the results of radiogeochemical studies carried out by IGEM RAS in the Kara Sea and the estuaries of Ob and Enisey rivers in 1995-2003, specifically on Akademik Boris Petrov research vessel. Based on the studies of circa 1500 samples of bottom sediments, obtained from 172 sea and rivers stations, 137Cs distribution map in the surface sediments was created. Four zones of radiocesium overactivity (> 15 Bk/kg) were identified: Novaya Zemlya Zone, Vaigach Zone, Ob Zone and Yenisei Zone. The allocated zones have different radiocesium concentration levels, as well as different infl ow sources, but all of them were generated under the influence of complex geochemical barriers. Based on the 47 sectioned cores of bottom sediments research, sampled in Ob Zone and Yenisei Zone overactivity zones, the distinct differences in vertical radiocesium distribution were identifi ed. It is evidenced that these differences are caused by oscillations of suspended silt discharge over the years, which are main transfer agents of radiocesium dissolvable and semi-dissolvable forms and doesn’t depend on sedimentation circumstances as well as on geochemical characteristics of depositing environment.
URL: http://elibrary.ru/item.asp?id=18152407
