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。 在接下来的两年中，努力将针对离子相互作用如何影响海水中金属和非金属的氧化速率。速率的测量将与pH，盐度，温度和成分的关系在海水中进行，以阐明海水离子成分的影响。 （如果可能的话）将对反应的产物和中间体进行研究，以阐明该作用的机制。 在接下来的两年中，还计划继续测量H2S的氧化，并在海水中使用Fe（II）的氧化物进行氧化。测量将作为pH，温度和盐度的函数进行。 将测量H2S的消失和Fe（II）的出现。还计划确定产品，SO3 2-和S2O3 2-如何受pH，温度和盐度的影响。 研究还将开始研究H2S03的Fe（III）和自然水平的NM水平的Fe（II）的氧化。 新的热力学建模将在海水中的碳酸盐系统以及Fe（II）和Fe（III）状态上进行。这些研究将有望导致一系列一致的稳定常数和Pitzer相互作用参数，这些参数可用于在自然水中表征这些系统。