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

铼和锇在热液中的行为：实验勘察研究

• 批准号: 9614773
• 负责人: Scott Wood
• 金额: $ 7.8万
• 依托单位: Regents of the University of Idaho
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 1999-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614773&HistoricalAwards=false
• 关键词: Behavior; Rhenium; Osmium; Hydrothermal; Solutions

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.

9614773 Wood该提案旨在解决缺乏关于水热溶液中RE和OS行为的数据，并通过一系列侦察溶解度实验在广泛的仔细约束条件下进行。 该研究具有以下目的：1）确定RE和OS最易溶的条件，并在其本质上是可移动的条件上施加限制； 2）获得有关溶液中主要溶解金属物质的性质的初步证据（例如，氯化物复合物，甲硫化物复合物，氧气）； 3）确定旨在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具有巨大的价值，可以在各种地质环境中解释Re-OS系统学的解释。 此外，由于Rhenium和Technicium之间的强烈地球化学相似性，对RE溶解度的了解可能与在深埋的核废料废物存储库的近场环境中对这种长期放射性核素的迁移的评估有关。