Stability, Composition, and Core–Shell Particle Structure of Uranium(IV)-Silicate Colloids
| Autor: | Carolyn I. Pearce, Samuel Shaw, Philip A. Chater, Louise S. Natrajan, Katherine Morris, Thomas S. Neill, Arne Janssen, M. Grace Burke, Nicholas K. Sherriff |
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| Rok vydání: | 2018 |
| Předmět: |
Water Pollutants
Radioactive Nuclear fuel Chemistry Silicates Inorganic chemistry Radioactive waste chemistry.chemical_element 02 engineering and technology General Chemistry Actinide Uranium 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Spent nuclear fuel Silicate 0104 chemical sciences chemistry.chemical_compound Radioactive Waste Environmental Chemistry Particle Colloids Particle size 0210 nano-technology |
| Zdroj: | Environmental Science & Technology. 52:9118-9127 |
| ISSN: | 1520-5851 0013-936X |
| Popis: | Uranium is typically the most abundant radionuclide by mass in radioactive wastes and is a significant component of effluent streams at nuclear facilities. Actinide(IV) (An(IV)) colloids formed via various pathways, including corrosion of spent nuclear fuel, have the potential to greatly enhance the mobility of poorly soluble An(IV) forms, including uranium. This is particularly important in conditions relevant to decommissioning of nuclear facilities and the geological disposal of radioactive waste. Previous studies have suggested that silicate could stabilize U(IV) colloids. Here the formation, composition, and structure of U(IV)-silicate colloids under the alkaline conditions relevant to spent nuclear fuel storage and disposal were investigated using a range of state of the art techniques. The colloids are formed across a range of pH conditions (9-10.5) and silicate concentrations (2-4 mM) and have a primary particle size 1-10 nm, also forming suspended aggregates |
| Databáze: | OpenAIRE |
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