Relationship of Th(IV) Speciation to Scavenging in Marine Environments

Th(IV) 形态与海洋环境中清除的关系

• 批准号: 9633125
• 负责人: Peter Santschi
• 金额: $ 12.3万
• 依托单位: Texas A&M Research Foundation
• 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: 1996-09-15 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633125&HistoricalAwards=false
• 关键词: Relationship; Th; IV; Speciation; Scavenging

9633125 SANTSCHI The various naturally-occurring radioactive isotopes of thorium (Th) have come to prominence in chemical oceanography because of their utility in determining the rates of flux of large particulate and colloidal subparticles. The tendency of Th to preferentially come out of good tracer for particle dynamics (production, destruction, sinking, mixing). However, the computations involved are model-based, and the models currently used are rather simplistic. In this research, the PI and his coworkers at Texas A&M University will conduct laboratory experiments to determine the sorption-description kinetic properties of Th in seawater with particles, organic molecules, and colloids aggregate into larger and larger aggregates, a process responsible for the formation of new particles in marine and other natural waters. The results will finally be folded into a more realistic model of Th behavior that should help marine chemists and geochemists use the Th tracer more confidently and with a better understanding of its limitations as well as its utility.

小行星9633125 钍的各种天然放射性同位素在化学海洋学中已经变得突出，因为它们在确定大颗粒和胶体亚颗粒的通量率方面具有实用性。 Th倾向于优先从颗粒动力学（产生、破坏、下沉、混合）的良好示踪剂中出来。 然而，所涉及的计算是基于模型的，目前使用的模型相当简单。在这项研究中，PI和他的同事在得克萨斯州A M 该大学将进行实验室实验，以确定Th在海水中的吸附描述动力学特性，颗粒，有机分子和胶体聚集成越来越大的聚集体，这是一个在海洋和其他自然沃茨中形成新颗粒的过程。 结果将最终被折叠成一个更现实的模型Th的行为，应该帮助海洋化学家和地球化学家更自信地使用Th示踪剂，更好地了解其局限性，以及它的效用。