Dowdall M, Gwynn J P, Moran C, O'Dea J, Davids C, Lind B
Norwegian Radiation Protection Authority, Polar Environmental Centre, 9296 Tromsø, Norway.
Environ Pollut. 2005 Jan;133(2):327-32. doi: 10.1016/j.envpol.2004.05.032.
Radionuclide levels in vegetation from a High Arctic location were studied and compared to in situ soil concentrations. Levels of the anthropogenic radionuclide 137Cs and the natural radionuclides 40K, 238U, 226Ra and 232Th are discussed and transfer factor (TF) values and aggregated transfer (Tag) values are calculated for vascular plants. Levels of 137Cs in vegetation generally followed the order mosses > lichen > vascular plants. The uptake of 137Cs in vascular plants showed an inverse relationship with the uptake of 40K, with 137Cs TF and Tag values generally higher than 40K TF and Tag values. 40K activity concentrations in all vegetation showed little correlation to associated soil concentrations, while the uptake of 238U, 226Ra and 232Th by vascular and non-vascular plants was generally low.
对北极地区一处地点的植被中的放射性核素水平进行了研究，并与原地土壤浓度进行了比较。讨论了人为放射性核素137Cs以及天然放射性核素40K、238U、226Ra和232Th的水平，并计算了维管植物的转移因子（TF）值和累积转移（Tag）值。植被中137Cs的水平通常遵循苔藓>地衣>维管植物的顺序。维管植物对137Cs的吸收与对40K的吸收呈反比关系，137Cs的TF值和Tag值通常高于40K的TF值和Tag值。所有植被中40K的活度浓度与相关土壤浓度几乎没有相关性，而维管植物和非维管植物对238U、226Ra和232Th的吸收通常较低。
