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

被引：4
|
作者：
Bakunov, N. A. [1 ]
Bol'shiyanov, D. Yu [1 ]
Makarov, A. S. [1 ]
机构：
[1] RF State Inst Arctic & Antarctic Res Inst, St Petersburg 199397, Russia
来源：
WATER RESOURCES | 2012年 / 39卷 / 05期
关键词：
lake; artificial radionuclides; cumulative reserve; water; bed soils; water purification;
D O I：
10.1134/S0097807812050028
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
The state of radioactive pollution of Lake Ladoga has been studied. The purification half-life of lake water from Sr-90 was found to be 21.7 year. The ratio of Sr-90 storage in lake water volume to its storage in silts (0-10 cm layer) was 2: 1. Lake water purification from global Cs-137 was slower than that from Cs-137 originating from Chernobyl emergency emission because of the chronic supplement of global Cs-137 reserve by atmospheric fallouts. The behavior of Sr-90, Cs-137, and Pu-239,Pu-240 in bed soils was in agreement with the geochemical nature of the elements. By the distribution of Pu-239,Pu- 240 in bed soils, the sedimentation of substances of non-radiation nature was estimated at 0.3 and 0.5 mm/year at denting and flat relief, respectively.
引用
收藏
页码：556 / 563
页数：8
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