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.

该项目研究硫化铁矿物的化学性质，以及控制其在天然沉积物中的分布和成分的因素。 拟议研究的主要重点是过渡金属和“B”类金属与硫化铁矿物的相互作用，并建立在最新研究成果的基础上。 将进行 Mackinawite 反应动力学以及非铁金属与该相的共沉淀的实验研究，以提供与硫化物环境中金属行为相关的信息。 将研究多种硫化物沉积物中几种重要“痕量”金属在“反应”相、溶解相和黄铁矿相中的分布，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踪剂的“罐子”实验得到加强。