Study of Ionic Interactions In Seawater

海水中离子相互作用的研究

• 批准号: 9400784
• 负责人: Frank Millero
• 金额: $ 32.13万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-11-15 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9400784&HistoricalAwards=false
• 关键词: Study; Ionic; Interactions; Seawater

MILLERO 9400784 This project will continue the study of how ionic interactions affect processes in seawater and other natural waters. In the next two years efforts will be directed at how ionic interactions affect the rates of oxidation and reduction of metals and nonmetals in seawater. Measurements of the rates will be made in seawater as a function of pH, salinity, temperature and composition to elucidate the effect of the ionic components of seawater. Studies of the products and intermediates of the reactions will be made (when possible) in an attempt to elucidate the mechanisms of the actions. During the next two years it is also planned to continue measurements on oxidation of H2S with the oxides of Fe(II) in seawater. The measurements will be made as a function of pH, temperature, and salinity. The disappearance of H2S and the appearance of Fe(II) will be measured. It is also planned to determine how the products S, SO3 2-, and S2O3 2- are affected by pH, temperature, and salinity. Studies will also be initiated on the reduction of Fe(III) with H2S03 and the oxidation of Fe(II) with O2 at nM levels in natural waters. New thermodynamic modeling will be carried out on the carbonate system and the state of Fe(II) and Fe(III) in seawater. These studies will hopefully lead to a consistent set of stability constants and Pitzer interaction parameters that can be used to characterize these systems in natural waters.

MILLERO 9400784 该项目将继续研究离子相互作用如何影响海水和其他天然水域的过程。 未来两年的工作将集中于离子相互作用如何影响海水中金属和非金属的氧化和还原速率。将在海水中测量 pH 值、盐度、温度和成分的速率，以阐明海水离子成分的影响。将（如果可能）对反应的产物和中间体进行研究，以试图阐明作用机制。 在接下来的两年中，还计划继续测量海水中 Fe(II) 氧化物对 H2S 的氧化作用。测量将根据 pH、温度和盐度进行。 将测量 H2S 的消失和 Fe(II) 的出现。还计划确定产物 S、SO3 2- 和 S2O3 2- 如何受 pH、温度和盐度的影响。 还将开始研究天然水中 nM 水平的 H2SO3 还原 Fe(III) 和 O2 氧化 Fe(II)。 将对碳酸盐体系以及海水中 Fe(II) 和 Fe(III) 的状态进行新的热力学建模。这些研究有望产生一组一致的稳定性常数和皮策相互作用参数，可用于表征天然水域中的这些系统。