The Influence of Pressure and Ionic Strength on Rare Earth Element Solution Chemistry, Surface Chemistry and Coprecipitation Behavior in Seawater

压力和离子强度对海水中稀土元素溶液化学、表面化学和共沉淀行为的影响

• 批准号: 9522878
• 负责人: Robert Byrne
• 金额: $ 43.28万
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9522878&HistoricalAwards=false
• 关键词: Influence; Pressure; Ionic; Strength; Rare

9522878 Byrne Important controls on the behavior and the rare earth elements in seawater include: Solution complexation, association with organic ligands on particle surfaces, and incorporation in phosphate coprecipiates. An understanding of these controls is important for a general understanding of metal behavior in seawater, and also because of the closely related chemistries of the rare earths and anthropogenic radioactive actinides. The behavior of Y, are rare earths and actinides in complexation, coprecipitation and sorption processes is highly dependent on ionic strength and pressure. There is relatively little direct information allowing quantitative predictions of the influence of ionic strength on rare earth equilibrium processes, and an extreme paucity of data appropriate to descriptions of the influence of pressure on trace metal equilibria in general. This study will quantitatively characterize the influence of pressure and ionic strength on the comparative solution, surface and solid-state chemistries of yttrium and fourteen rare earth elements.

小行星9522878 稀土元素在海水中的行为和重要的控制因素包括：溶液络合，与颗粒表面的有机配体缔合，以及掺入磷酸铜盐中。了解这些控制对于全面了解海水中的金属行为非常重要，也因为稀土和人为放射性锕系元素的化学性质密切相关。稀土和锕系元素钇在络合、共沉淀和吸附过程中的行为高度依赖于离子强度和压力。有相对较少的直接信息，允许定量预测的离子强度对稀土平衡过程的影响，和一个极端缺乏的数据，适当的压力对痕量金属平衡的影响的描述一般。本研究将定量表征压力和离子强度对钇和14种稀土元素的比较溶液、表面和固态化学的影响。