The Leaching Behavior of a Glass Waste Form – Part I: The Characteristics of Surface Layers

摘要: The Soxhlet-type leaching test was carried out on borosilicate glass that contained 14 wt% simulated high-level waste. morphology, texture, composition, and crystallography of the surface layers formed were examined using optical microscopy, scanning electron probe microanalysis, analytical microscopy. Four layers, made up 100- to 1000-A crystalline noncrystalline particles, glass. elements found classified into three groups based their behavior in layers. Group I alkali metals, such as sodium, potassium, cesium, which strongly depleted from a result leaching. II manganese, iron, nickel, zirconium, lanthanum, cerium, neodymium, more concentrated than unleached part specimen, probably because had shrunk during drying process. III behaved inconsistently group: Some, calcium, silicon, aluminum, poor layers; magnesium barium present, but concentration profiles differed those II. Only one phase, sheet silicate, It expected chemical form, (Ca, Ba, La,more » Ce, Nd) /sub x/ (Mn, Fe, Zr, Mg, Ni, Al) y/ (Si, z/ (O, OH) m/ ; its formation influenced mechanisms.« less