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自然沃茨中的过程。 在今后两年中，将致力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。将在海水中测量作为pH值、盐度、温度和成分的函数的速率，以阐明海水离子成分的影响。将对反应的产物和中间体进行研究（如可能），以试图阐明作用机制。 在今后两年中，还计划继续测量海水中Fe（II）氧化物对H2S的氧化作用。测量将作为pH值、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S、SO 3 2-和S2 O3 2-如何受pH、温度和盐度的影响。 还将开始研究在自然沃茨中用H2SO 3还原Fe（III）和用O2氧化Fe（II）的nM水平。 将对碳酸盐体系和海水中Fe（II）和Fe（III）的状态进行新的热力学模拟。这些研究将有望导致一组一致的稳定常数和Pitzer相互作用参数，可用于表征这些系统在自然沃茨。