National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, Ibaraki 305-8604, Japan.
Sci Total Environ. 2016 Oct 1;566-567:1432-1439. doi: 10.1016/j.scitotenv.2016.06.004. Epub 2016 Jun 16.
During the early stages of the Fukushima nuclear accident, the temporal variations of (131)I deposited on the ground and of (131)I accumulated in cropland soil were monitored at a fixed location in Japan. Moreover, concentrations of long-lived radioactive iodine ((129)I) in atmospheric deposits and soil were measured to examine the feasibility of retrospectively reconstructing (131)I levels from the levels of accident-derived (129)I. The exceptionally high levels of (131)I in deposits and soil were attributed to rainfall-related deposition of radionuclides. In the crop field studied, the losses of deposited (131)I and (129)I due to volatilization were small. The atomic ratio (129)I/(131)I in the topsoil corresponded to the same ratio in deposits. The (131)I concentrations measured in the topsoil were very consistent with the (131)I concentrations reconstructed from the (129)I concentrations in the soil.
在福岛核事故的早期阶段，在日本的一个固定地点监测了（131）I 在地面上的沉积和（131）I 在农田土壤中的积累的时间变化。此外，还测量了大气沉积物和土壤中长寿命放射性碘（（129）I）的浓度，以检验从事故衍生的（129）I 水平回溯重建（131）I 水平的可行性。由于与降雨有关的放射性核素沉积，导致沉积物和土壤中（131）I 的含量异常高。在所研究的农田中，由于挥发而损失的沉积（131）I 和（129）I 较少。表土中的（129）I/（131）I 原子比与沉积物中的相同。从土壤中（129）I 浓度重建得到的表土中（131）I 浓度与实测浓度非常吻合。
Zotero 插件