Geological Survey of Sweden, Box 670, 751 28, Uppsala, Sweden.
Ambio. 2013 May;42(4):414-24. doi: 10.1007/s13280-013-0408-4.
To assist transport modeling in assessments of the radiological impact of a geological repository for radioactive wastes, the mobility of various elements was studied in arable and wetland soils in the Forsmark region, Sweden. Pore water and total element contents were determined for five types of unconsolidated deposits (regolith), spanning a wide range of soil properties with respect to pH and organic matter content. Two soil depths were sampled to capture element mobility in regolith layers affected and unaffected by soil-forming processes. The solid/liquid partition coefficients (K d values) for most elements varied significantly among regolith types. For most elements, the observed variations in K d values could be explained by variations in soil properties. For many elements, mobility increased with decreasing soil pH. The results provide a significant addition of data on radionuclide retention in soils, taking account of soil properties and processes.
为了协助运输模型评估放射性废物地质处置库的放射性影响，对瑞典福斯马克地区的耕地和湿地土壤中各种元素的迁移性进行了研究。测定了五种非固结沉积物（风化层）的孔隙水和总元素含量，这些沉积物在 pH 值和有机质含量方面具有广泛的土壤特性。采集了两个土壤深度的样本，以捕获受土壤形成过程影响和不受其影响的风化层中元素的迁移性。大多数元素的固/液分配系数（Kd 值）在风化层类型之间差异显著。对于大多数元素，Kd 值的观测变化可以用土壤特性的变化来解释。对于许多元素，随着土壤 pH 值的降低，其迁移性增加。这些结果提供了考虑土壤特性和过程的土壤中放射性核素滞留的大量数据补充。
