タグ「bottom sediments」
Author: Stukalov P.M., Simkina N.A.
Reference: Gazette “ВОПРОСЫ РАДИАЦИОННОЙ БЕЗОПАСНОСТИ“ (Issues on radiation safety), 2008
ISSN: 1816-9643
DOI: 621.039.7: 539.16.170 2008
Keywords: desorption parameters, resevoir, bottom sediments
Abstract: Results of experimental determination of radionuclide desorption parameters (desorption factor, washed-out activity fraction) are considered in the bottom sediments in the reservoir Staroye Boloto used as Mayak PA liquid radioactive waste storage. The principal attention is paid to the activities carried out in the Institute for Biophysics (Moscow) for dense sludge and loam beds, as well as to the Mayak PA studies (2008) ofstrontium, ceasium and uranium isotope wash-out from the upper aqueous bed of man-induced sludge oft he reservoir.
URL: http://elibrary.ru/item.asp?id=11659550
Author: Gedeonov AD, Petrov ER, Alexeev IN, Kuleshova VG, Savopulo ML, Burtsev IS, Shkroev VY, Arkhipov VI.
Reference: J Environ Radioact. 2002;60(1-2):221-34.
ISSN:
Keywords: peaceful underground nuclear explosion sites “Craton-3″ and “Crystal”, 137cs
Abstract: In this paper, results are reported on the concentrations and activity ratios of 137Cs, 239+240Pu and 238Pu in soils, lichen and bottom sediments collected at the peaceful underground nuclear explosion sites “Craton-3″ and “Crystal” (Republic of Sakha (Yakutia), North-East Siberia). At the “Craton-3″ site, 239- 240Pu concentrations in the range 6.2 mBq/g to 5.9 Bq/g in surface soils (0-5 cm) and 239+240Pu concentrations up to 7.4 Bq/g in lichen were observed. The 137Cs concentration in measured soils range from 0.52 to 216 Bq/g for the near-plume and from 1.65 to 21.5 Bq/g for the far-plume. In lichen, 137Cs concentration varied from a global background level up to 251 Bq/g. Radioactive contamination at “Crystal” demonstrates an extremely irregular distribution of 239,240Pu and 137Cs in environmental samples taken at locations within 150 m radius of the site. Further work on compiling detailed maps of radioactive contamination of the territory around “Craton-3″ and “Crystal” is discussed.
URL: http://www.ncbi.nlm.nih.gov/pubmed/11936609
Author: L. G. Bondareva, A. Ya. Bolsunovskii
Reference: Radiochemistry, 2008
ISSN: 1608-3288
DOI: 10.1134/S1066362208050196
Keywords: bottom of river, 137cs, 60co, 152eu, 241am
Abstract: The speciation of artificial radionuclides 60Co, 137Cs, 152Eu, and 241Am in surface layers of bottom sediments of the Yenisei river, collected within the near zone of impact of the Mining and Chemical Combine (Rosatom), was studied. In these samples the radionuclides 60Co, 152Eu, and 241Am are mainly associated with fractions of humic and fulvic acids. The fraction of 152Eu associated with nonsilicate iron is approximately 92%. The migration capability of radionuclides collected near the Atamanovo settlement decreases in the order 152Eu > 241Am > 60Co > 137Cs. For samples collected near Bol’shoi Balchug settlement, this order is as follows: 152Eu ≈ 241Am > 60Co > 137Cs. The presence of radionuclide-bearing micro-particles in bottom sediments considerably complicates the distribution of radionuclides, in particular, of 241Am and 137Cs, among migration forms.
URL: http://link.springer.com/article/10.1134%2FS1066362208050196?LI=true#
