The state of Lake Ladoga pollution by global 90Sr, 137Cs, and 239,240Pu

Bakunov, N. A.; Bolshiyanov, Dimitry Yu; Макаров, А. А.

doi:10.1134/s0097807812050028

Cited by 4 publications

(7 citation statements)

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“…The near-surface layers of BS, 0-2 and 2-4 cm, contained 177.0 and 89.9 Bq kg -1 137 Сs, respectively. The distribution of the 137 Сs levels in BS of station 56 was similar [10]. Accumulation of the "Chernobyl" nuclide in the surface layer of BS, 0-2 cm, masked the formation of the subsurface maximum of global 137 Сs.…”

Section: Resultsmentioning

confidence: 67%

“…These seas are characterized by combined water contamination including 137 Сs from global fallout, Chernobyl accident, and industrial dumping from Sellafield and Cape Hague plants [9]. Whereas no Chernobyl 137 Сs fallout was observed in the catchment area of the Levinson-Lessing Lake (central Taimyr), its fallout on the surface of Lake Ladoga (~74.1 TBq) was comparable to the global 137 Сs fallout (~73.4 TBq) [10].…”

Section: Methodsmentioning

confidence: 99%

“…The urgency of this study is associated with the DOI: 10.1134/S1066362215030145 need for predicting the 137 Сs migration with water from the sites of dumping by plants of nuclear industry and the transfer of substances between the lithosphere and hydrosphere using the 137 Сs radionuclide characterized by conservative behavior in aqueous medium.…”

mentioning

confidence: 99%

“…Studies were performed with columns of 137 Cscontaining bottom sediments taken from the bottom of deep lakes (Lake Ladoga and Levinson-Lessing Lake) [5,10,11] and from estuaries of the Baltic, Pechora, and Laptev seas [12][13][14][15]. The experimental material on the 137 Сs levels in columns of bottom sediments (BS), obtained by different authors [12][13][14][15][16][17], was analyzed and summarized after identification of the 137 Сs origin: global fallout, sea dumping, or Chernobyl accident.…”

mentioning

confidence: 99%

“…In our studies [10], determinations of radionuclides in BS of deep lakes were performed by licensed procedures using γ-and α-ray spectrometry for 137 Сs and 239,240 Pu, respectively. The relative uncertainty of determining the 137 Сs concentration did not exceed 40%.…”

mentioning

confidence: 99%

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From global 137Cs to determinations of the sedimentation rate in deep lakes and sea estuaries

2015

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Sedimentation rate in deep lakes and estiaries of the Baltic, Pechora, and Laptev Seas was determined using global 137 Сs as a sedimentogenesis marker. The sedimentation rate in Lake Ladoga and Levinson-Lessing Lake was 0.3-3 mm year -1 , and that in estuaries of the Baltic, Pechora, and Laptev Seas was 0.74-1.76, 1.0, and 3.3-5.0 mm year -1 , respectively. At a sedimentation rate of >1-2 mm year -1 , the concentration peaks of global and "Chernobyl" 137 Сs in the bulk of the bottom sediments do not overlap, and the sedimentation rate is estimated for each kind of nuclides separately. At a sedimentation rate of <1 mm year -1 , "Chernobyl" 137 Сs + 137 Сs from dumping into sea mask in the bottom sediments the subsurface maximum of the global 137 Сs concentration and prevent the sedimentation rate determination. The use of 137 Cs for sedimentation rate determinations is appropriate for the poorly studied shelf zone of Russian Arctic seas.

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Section: Resultsmentioning

confidence: 67%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%