Ionic Interactions in Seawater

研究将进行离子相互作用及其对海水和其他自然水域的速率过程的影响。将在海水中测量其随pH值、盐度、温度和成分的变化，以阐明海水中离子成分的影响。在可能的情况下，将对反应的产物和中间体进行研究，试图阐明反应的机理。将继续测量海水中H2S和H2SO3与O2的氧化作用。H2S研究将包括：1)测量产品SO32-如何受到pH、温度和盐度的影响；2)测定Fe（II）、Fe（II）和Mn（II）对nM级H2S速率的影响。研究了海水中H2SO3随pH、温度、盐度和微量金属浓度的变化规律。将完成天然水体中H2O2还原Cu（II）的研究，并对H2S与Fe（III）和Mn（IV）氧化物的氧化速率作为pH、盐度和温度的函数进行新的测量。用HS-测定金属的稳定常数也将用方波极谱技术测定。今后两年的实地研究将在卡里亚科海沟（1990年春季）和切萨皮克湾（1990年夏季）进行。

Studies will be conducted of ionic interactions and their effect on rate processes in seawater and other natural waters. 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 product and intermediates of the reactions will be made (when possible) in an attempt to elucidate the mechanisms of the reactions. Measurements will be continued on the oxidation of H2S and H2SO3 with O2 in seawater. The H2S studies will include: 1) measurements to examine how the products SO32- are affected by pH, temperature, and salinity; 2) measurements to determine hoe Fe (II), Fe(II) and Mn(II) affect the rates at nM levels of H2S. The H2SO3 studies will be made in seawater as a function of pH, temperature, salinity and the concentration of trace metals. Studies on the reduction of Cu(II) with H2O2 in natural waters will be completed and new measurements on the rates of oxidation of H2S with oxides of Fe(III) and Mn(IV) will be made as a function of pH, salinity and temperature. Measurements of the stability constants of metals with HS- will also be determined using a square wave polarographic technique. Field studies during the next two years will be located in the Cariaco Trench (Spring 1990) and the Chesapeake Bay (Summer 1990).