The Behavior of Rhenium and Osmium in Hydrothermal Solutions: An Experimental Reconnaissance Study

9614773 Wood该提案旨在解决缺乏关于Re和Os在热液溶液中行为的数据的问题，并在广泛的严格限制条件下进行一系列勘探溶解度实验。 本研究的目的如下：1）确定Re和Os最易溶解的条件，并对它们在自然界中可能是移动的的条件加以限制; 2）获得关于溶液中主要溶解金属物种性质的初步证据（例如，氯化物络合物、二硫化物络合物、氧阴离子）; 3）确定设计用于获得详细的化学计量和热力学数据的进一步实验的可行性。 如果成功的话，这项研究的结果可能是巨大的价值，在协助解释Re-Os系统在各种地质环境。 此外，由于铼和technicium之间强烈的地球化学相似性，Re溶解度的知识可能与深埋核废物处置库近场环境中这种长寿命放射性核素的迁移评估有关。

9614773 Wood This proposal aims to address the lack of data on the behavior of Re and Os in hydrothermal solutions with a series of reconnaissance solubility experiments to be conducted under a broad range of carefully constrained conditions. The study has the following objectives: 1) determine those conditions under which Re and Os are most soluble and place constraints on the conditions under which they might be mobile in nature; 2) obtain preliminary evidence as to the nature of the predominant dissolved metal species in solution (e.g., chloride complex, bisulfide complex, oxyanion); 3) determine the feasibility of further experimentation designed to obtain detailed stoichiometric and thermodynamic data. If successful, the results of this study could be of immense value in assisting in the interpretation of Re-Os systematics in a variety of geological environments. Furthermore, owing to the strong geochemical similarities between rhenium and technicium, knowledge of Re solubilities could be relevant to the evaluation of migration of this long-lived radionuclide in the near-field environment of deeply buried nuclear waste repositories.