Surface Chemistry and Reactivity of Metastable Iron Sulfides under Anoxic Marine Conditions

缺氧海洋条件下亚稳态硫化铁的表面化学和反应活性

• 批准号: 8817431
• 负责人: John Morse
• 金额: $ 19.62万
• 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: 1989
• 资助国家: 美国
• 起止时间: 1989-01-15 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8817431&HistoricalAwards=false
• 关键词: Surface; Chemistry; Reactivity; Metastable; Iron

This project is a study of the chemistry of iron sulfide minerals, and the factors controlling their distributions and composition in natural sediments. The primary focus of the proposed research is on the interaction of transition and class "B" metals with iron sulfide minerals, and builds on recent results. Experimental research on mackinawite reaction kinetics, and the coprecipitation of non-Fe metals with this phase will be undertaken to provide information relevant to metal behavior in sulfidic environments. The distribution of several important "trace" metals in "reactive", dissolved and pyrite phases will be studied in a variety of sulfidic sediments to determine the primary factors controlling the transfer of these metals into pyrite. These studies will be augmented by "jar" experiments with radiotracers.

该项目是对硫化铁矿物质化学的研究，以及控制其分布和天然沉积物中的分布和组成的因素。 拟议的研究的主要重点是过渡和“ B”金属与硫化铁矿物质的相互作用，并基于最新结果。 关于麦基诺反应动力学的实验研究以及非FE金属与此阶段的共沉淀，以提供与硫酸环境中金属行为相关的信息。 将在各种硫酸沉积物中研究“反应性”，溶解和黄铁矿相中几种重要的“痕量”金属的分布，以确定控制这些金属转移到黄铁矿中的主要因素。 这些研究将通过放射性示例进行“ JAR”实验来增强。