Method of making nanostructured glass-ceramic waste forms
| DWPI Title: Rendering hazardous material less dangerous involves trapping hazardous material in nanopore of nanoporous material; reacting trapped material and sealing material; and vitrifying nanoporous material with less volatile hazardous material |
| Abstract: A method of rendering hazardous materials less dangerous comprising trapping the hazardous material in nanopores of a nanoporous composite material, reacting the trapped hazardous material to render it less volatile/soluble, sealing the trapped hazardous material, and vitrifying the nanoporous material containing the less volatile/soluble hazardous material. |
| Use: For rendering hazardous materials (preferably radionuclide, especially 129 I and 99 Tc) less dangerous (claimed); and forming nanostructured glass-ceramic waste forms. |
| Advantage: The method does not require using silver for immobilizing iodine, thus reduces cost of waste form development as well as the potential environmental hazards related to waste form production disposal. The method produces cost-effective nanostructured glass-ceramic as the waste form for deposition. The method converts the getter materials (adsorbents) into durable waste forms at relatively lower vitrification temperature. |
| Novelty: Rendering hazardous materials less dangerous involves sorbing gaseous, molecular hazardous material in nanopores of nanoporous material to form sorbed, molecular hazardous material; reacting hazardous material with alkaline reagent/alkaline silicate to convert hazardous material into sorbed, anionic hazardous material; mixing the nanoporous material with glass-forming components excluding clay; and vitrifying the nanoporous material and glass-forming components to form glass/crystalline matrix containing nanometer precipitates of the hazardous material. |
| Filed: 7/1/2009 |
| Application Number: US2009495851A |
| Tech ID: SD 11220.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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