Arapis G D, Karandinos M G
Laboratory of Ecology and Environmental Sciences, Agricultural University of Athens, Votanikos, Iera odos 75, 118 55 Athens, Greece.
J Environ Radioact. 2004;77(2):133-42. doi: 10.1016/j.jenvrad.2004.03.004.
In the present study, the 137Cs concentration in the soil of sloping semi-natural ecosystems at four different regions of Western Macedonia in Greece was measured 10 years after the Chernobyl accident. These regions were highly polluted due to the deposition of radionuclides escaped during the accident. The concentrations of 137Cs measured were found to differ significantly among the four regions. The rates of both horizontal and vertical migration in the soil were also evaluated. The vertical migration velocity of 137Cs was found to range from 0.1 to 0.3 cm per year, in the most contaminated areas. Consequently, 10 years following the Chernobyl accident, the bulk of 137Cs deposited over the surface of the studied areas in Greece was found to be restricted in the upper 5 cm layer of soil. Regarding the horizontal migration, in most of the sampling sites, we did not detect any displacement or trend to movement of radiocaesium on the surface from the upper to the lower levels of the slopes. Instead, we recorded decreased concentrations of 137Cs with the decrease of altitude.
在本研究中，对希腊西马其顿四个不同地区的半自然生态系统斜坡土壤中的铯-137浓度进行了测量，测量时间为切尔诺贝利事故发生10年后。由于事故期间逸出的放射性核素沉降，这些地区受到了严重污染。结果发现，四个地区测量的铯-137浓度存在显著差异。同时还评估了土壤中铯-137的水平和垂直迁移速率。在污染最严重的地区，铯-137的垂直迁移速度为每年0.1至0.3厘米。因此，在切尔诺贝利事故发生10年后，发现希腊研究区域表面沉积的大部分铯-137都局限于土壤上层5厘米的土层中。关于水平迁移，在大多数采样点，我们没有检测到放射性铯在斜坡表面从上部到下部有任何位移或移动趋势。相反，我们记录到铯-137的浓度随着海拔的降低而降低。
