An investigation into how particle size influences the behaviour of bentonite colloids in Geological Disposal Facilities

本论文主要研究纳米膨润土粘土胶体。这些研究对于理解这些材料将如何在地质处置设施中充当缓冲作用至关重要，这些材料位于装有高放射性核废料的罐子和它们将要放置的钻孔壁之间。所寻求的信息是为了更好地了解几种阳离子(Cs、Ni和Eu)的选择性结合，胶体颗粒的平均尺寸如何影响这些阳离子的选择性结合，以及胶体如何帮助这些阳离子通过花岗岩裂隙进行运输。具体方面将包括研究生产胶体的不同方法，测定胶体的大小和流量。

The thesis research will focus on studies of nanoparticulate bentonite clay colloids. These studies are fundamental to understanding how the material would act as a buffer in a geological disposal facility, sitting between the canisters containing high level nuclear waste and the walls of the bore holes where they will sit. The information that is sought is to form a better understanding of the selective binding of several cations (Cs, Ni and Eu), how these are affected by the average size of the colloid particles and how the colloid assists in transporting these through granite fissures. Specific aspects will include studying different ways to produce the colloids, size them and measure their flow.