An evaluation of ratio systems in radioecological studies

被引:32
作者
McGee, EJ
Johanson, KJ
Keatinge, MJ
Synnott, HJ
Colgan, PA
机构
[1] SWEDISH UNIV AGR SCI, S-75007 UPPSALA, SWEDEN
[2] TRINITY COLL DUBLIN, DEPT ZOOL, DUBLIN 2, IRELAND
来源
HEALTH PHYSICS | 1996年 / 70卷 / 02期
关键词
Cs-137; soil; uptake; plant; K-40;
D O I
10.1097/00004032-199602000-00009
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Replicate samples of soil, Juncus squarrosus and Calluna vulgaris were taken within a grid system on an organic peatland soil site in Ireland. A similar sampling survey was carried out on an organic rich forest soil site in Sweden, where Vaccinium myrtillus and Vaccinium vitis-idaea with corresponding soil samples were taken within a Picea abies stand. The data were used to investigate the relationship between soil and plant Cs-137 content and to examine the validity of using ratios to describe this relationship. Findings from both countries were in agreement. There were no significant changes in plant Cs-137 concentration associated with increasing soil content. When data from both countries were merged and treated as a single data set, a significant overall positive correlation (95% confidence level) between soil and plant Cs-137 levels was observed. Concentration ratios and transfer factors were calculated for Cs-137 and K-40 uptake from soils to plants. Both ratio types exhibited a clearly defined decrease associated with increasing soil concentrations for both radionuclides. Findings demonstrate serious problems with the use of ratios for the evaluation of radionuclide transfer.
引用
收藏
页码:215 / 221
页数:7
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