Quaternary Effects in Solute Transport Through Swollen Clay Films in Complex Media Studied by Clay Modified Electrodes and X-ray Diffraction

9315396 Fitch这个项目属于分析化学和表面化学的一般领域，主要研究粘土输运特性的电化学研究。在这项为期三年的持续拨款的任期内，芝加哥洛约拉大学的Alanah Fitch教授和她的学生将使用粘土修饰电极来研究离子在特征良好的粘土层中的扩散。研究了压力和电解质浓度对粘土材料溶胀和输运性能的影响。此外，多种溶质对这些性质的影响将被探讨，以确定合作或协同运输的程度。本实验研究旨在进一步了解典型污染物（包括疏水有机物质和阴离子放射性化学物质）通过粘土密封层在土壤中的运移。这项研究预计将对用于化学废物处置库的粘土材料中发生的几个重要过程提供更好的理解。需要探讨的问题包括各种有毒化学物质对这些粘土材料特性的影响，包括它们的膨胀和运输特性。成功地实现这个项目的目标，应该能够更准确地预测污染物从围堵场址逃逸的速度。＊＊＊

9315396 Fitch This project is in the general area of analytical and surface chemistry and focuses on the electrochemical investigation of the transport properties of clays. During the tenure of this three year continuing grant, Professor Alanah Fitch and her students at Loyola University of Chicago will use clay-modified electrodes to investigate the diffusion of ions through well characterized clay layers. The effects of pressure and electrolyte concentration on the swelling and transport properties of the clay materials will be examined. Also, the influence of multiple solutes on these properties will be explored to determine the extent of cooperative or synergistic transport. This experimental investigation is designed to further our understanding of the soil-based transport of typical pollutants, including both hydrophobic organic materials and anionic radiochemicals, through clay containment beds. %%% This research is expected to provide an enhanced understanding of several important processes which take place within the clay materials that are used to line chemical waste disposal repositories. Among the issues to be explored are the effects of various toxic chemicals on the characteristics of these clay materials, including their swelling and transport properties. The successful pursuit of the goals of this project should enable more accurate prediction of the rates of escape of pollutants from containment sites. ***