Centro Nacional de Aceleradores (CNA), Avda. Thomas Alva Edison 7, Isla de la Cartuja, 41092 Seville, Spain.
J Environ Radioact. 2013 Jan;115:134-42. doi: 10.1016/j.jenvrad.2012.08.007. Epub 2012 Aug 30.
(129)I is a very long-lived radionuclide (T(1/2) = 15.7 × 10(6) years) that is present in the environment both because of natural and anthropogenic sources. In this work (129)I concentration and (129)I/(127)I ratio have been determined in seaweed Fucus vesiculosus collected in the Southern Baltic Sea during 1982 and 1986 (post-Chernobyl accident). The resulting data were evaluated in terms of (129)I concentrations, (129)I/(127)I and (129)I/(137)Cs ratios. (129)I concentrations were found to be in the order of (0.82-5.89) × 10(9) atoms g(-1) in 1982 and (1.33-38.83) × 10(9) atoms g(-1) in 1986. The (129)I/(127)I ratios ranged from (22.7-87.8) × 10(-10) for seaweed collected in 1982 and from (26.1-305.5) × 10(-10) for seaweed collected in 1986. Also a linear relationship was established for (127)I concentrations in seawater and salinity in this area, enabling the estimation of concentration factors for (127)I in F. vesiculosus. The high levels of (129)I and (129)I/(127)I in the Kattegat and their gradually decreasing trend to the Baltic Sea indicates that the most important contribution to the (129)I inventory in the Baltic Sea area comes from Sellafield and La Hague reprocessing plants. With respect to Chernobyl accident, (129)I concentrations in samples collected in 1986 were not much higher than those expected in less contaminated samples from 1982. This supports the view that the contribution of the Chernobyl accident to (129)I in the Baltic region was not significant.
（129）I 是一种非常长寿命的放射性核素（T（1/2）= 15.7×10（6）年），由于自然和人为来源，它在环境中都存在。在这项工作中，我们在 1982 年和 1986 年期间（切尔诺贝利事故后）在南波罗的海采集的海藻泡叶藻中测定了（129）I 的浓度和（129）I/（127）I 比值。根据（129）I 浓度、（129）I/（127）I 和（129）I/（137）Cs 比值对所得数据进行了评估。1982 年（129）I 浓度的顺序为（0.82-5.89）×10（9）原子 g（-1），而 1986 年（129）I 浓度的顺序为（1.33-38.83）×10（9）原子 g（-1）。1982 年采集的海藻的（129）I/（127）I 比值范围为（22.7-87.8）×10（-10），而 1986 年采集的海藻的（129）I/（127）I 比值范围为（26.1-305.5）×10（-10）。此外，还建立了该地区海水中（127）I 浓度与盐度之间的线性关系，从而可以估算（127）I 在泡叶藻中的浓缩因子。卡特加特海峡（Kattegat）中（129）I 和（129）I/（127）I 的含量很高，且呈逐渐向波罗的海递减的趋势，这表明对波罗的海地区（129）I 库存的最重要贡献来自塞拉菲尔德（Sellafield）和拉阿格（La Hague）再处理厂。就切尔诺贝利事故而言，1986 年采集的样本中的（129）I 浓度并不比 1982 年采集的污染程度较低的样本中的（129）I 浓度高很多。这支持了这样一种观点，即切尔诺贝利事故对波罗的海地区（129）I 的贡献并不显著。
