Time series of uranium transformations in aerobic soils following experimental addition of uranyl ion

The data comprise measurements of the 'soluble', 'chemically exchangeable' and 'isotopically exchangeable' U concentrations in a diverse set of soils following experimental addition of UO22+ and incubation in the laboratory under controlled temperature conditions for ca. 1.7 years. The long term behaviour of U in aerobic soils was studied by conducting a laboratory-based experiment in which a set of twenty topsoils from central England with contrasting properties (e.g. pH, organic matter content, land use) were contaminated with a solution containing UO22+ in soluble form and incubated in the dark, in a moist but aerobic condition, at a temperature of 10 deg C for 619 days. The transformations of U in each soil microcosm were periodically monitored by means of soil extractions conducted on subsamples of incubated soils. The resulting dataset enabled quantification of the kinetics of UO22+ transformations in aerobic soils and the relationships with soil properties and land uses (arable, grassland and moorland/woodland). The dataset will be useful in developing models of long-term U bioavailability in aerobic soils under temperate conditions. Full details about this dataset can be found at https://doi.org/10.5285/0d8b2aea-574c-4cff-a8bd-17115a0b90fc本数据集包含针对多种不同土壤的可溶性铀、化学可交换态铀及同位素可交换态铀浓度的测定数据，这些土壤经实验添加铀酰离子（UO2²+）处理后，在实验室控温条件下培养约1.7年。本研究针对好氧土壤中铀的长期行为展开探究，通过开展室内实验完成：采集英格兰中部20种性质差异显著的表层土壤（其pH、有机质含量、土地利用类型等属性均存在差异），使用含可溶性铀酰离子（UO2²+）的溶液对其进行污染处理，随后在黑暗、湿润且好氧的环境中，于10摄氏度条件下培养619天。研究人员通过定期对培养土壤的子样本开展土壤萃取实验，对每个土壤微宇宙（soil microcosm）中的铀形态转化过程进行监测。本数据集可量化好氧土壤中铀酰离子（UO2²+）形态转化的动力学特征，及其与土壤性质、土地利用类型（耕地、草地、高地草原/林地）之间的关联。该数据集可用于构建温带条件下好氧土壤中铀长期生物有效性的预测模型。本数据集的完整详情可通过https://doi.org/10.5285/0d8b2aea-574c-4cff-a8bd-17115a0b90fc获取。