The Mechanism of Sulfide Mineral Oxidation

硫化矿物的氧化机理

• 批准号: 9004312
• 负责人: James Rimstidt
• 金额: $ 8.5万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-06-01 至 1992-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004312&HistoricalAwards=false
• 关键词: Mechanism; Sulfide; Mineral; Oxidation

The goal of this research program is to discover the details of the sulfide mineral oxidation reaction mechanism. A series of measurements of oxidation rates for several different sulfide minerals, show different reaction orders for different minerals as well as two distinct ranges of activation energies. These differences are presumably caused by differences in the overall reaction mechanism. The P.I. have used thermodynamic and kinetic information on individual aqueous sulfur species and elementary reactions taken from the literature to construct a general model of the sulfide mineral oxidation reaction mechanism. They propose to refine this model using experimental data, gathered as part of this research, on the effects of various catalysts and inhibitors (chemical probes of the mechanism) on the rate of the overall reaction and on the distribution of sulfur species in the reacted solution. These data will eventually be woven into a quantitative numerical model that should prove useful in a wide range of scientific and technological endeavors.

该研究计划的目标是发现硫化物矿物氧化反应机制的细节。 对几种不同硫化物矿物的氧化速率的一系列测量显示了不同矿物的不同反应级以及两个不同的活化能范围。 这些差异可能是由总体反应机制的差异引起的。 P.I.使用从文献中获取的单个含水硫物质和基元反应的热力学和动力学信息，构建了硫化物矿物氧化反应机制的通用模型。 他们建议使用作为本研究的一部分收集的实验数据来完善该模型，这些数据涉及各种催化剂和抑制剂（机制的化学探针）对整个反应速率以及反应溶液中硫物质分布的影响。 这些数据最终将被编织成定量数值模型，该模型应该在广泛的科学和技术工作中发挥作用。