Studies on leaching behaviour of sodium borosilicate glasses by neutron activation: Effects of groundwater composition, pH, surface area to volume ratio, and temperature
| Autor: | Amares Chatt, D. L. Moir |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Borosilicate glass
Health Toxicology and Mutagenesis Sodium Public Health Environmental and Occupational Health Analytical chemistry chemistry.chemical_element Pollution Analytical Chemistry Matrix (chemical analysis) Nuclear Energy and Engineering Volume (thermodynamics) chemistry Surface-area-to-volume ratio Radiology Nuclear Medicine and imaging Leaching (metallurgy) Boron Spectroscopy Nuclear chemistry Neutron activation |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry Articles. 161:503-526 |
| ISSN: | 1588-2780 0236-5731 |
| DOI: | 10.1007/bf02040498 |
| Popis: | Static leaching experiments have been conducted to evaluate the durability of sodium borosilicate glass as the host matrix for immobilized high-level radioactive wastes. Simulated granitic groundawater, synthetic Grande Ronde basaltic groundwater and distilled deionized water have been used. The results indicated a strong influence of the leachant composition through both its pH and nature as well as concentrations of the ions present on the leach rate. The roles of silicon, boron and a few other elements on leaching have been examined. Three surface area to volume ratios (SA/V) and two temperatures were investigated. Total mass loss and normalized elemental mass loss results showed that the rate of release decreased with increased SA/V ratio in the three leachants at both temperatures. The rate of leaching at 90 °C was 5–30 times higher than that at 40 °C. Activation energies for the glass at three SA/V ratios have been calculated. |
| Databáze: | OpenAIRE |
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