About: Geomelting

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GeoMelt is a process by which dangerous, contaminated material (such as radioactive waste and heavy metals) is mixed with clean soil, a blend of industrial minerals, and/or glass frit and melted to create an extremely hard and leach-resistant glass product. Vitrification immobilizes nearly all of the inorganic contaminants (i.e., radionuclides and heavy metals) present in the initial mixture by incorporation into the glass matrix. Organic wastes in the melt are destroyed by pyrolysis, and gaseous contaminants released during the melting process are treated separately.

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  • GeoMelt is a process by which dangerous, contaminated material (such as radioactive waste and heavy metals) is mixed with clean soil, a blend of industrial minerals, and/or glass frit and melted to create an extremely hard and leach-resistant glass product. Vitrification immobilizes nearly all of the inorganic contaminants (i.e., radionuclides and heavy metals) present in the initial mixture by incorporation into the glass matrix. Organic wastes in the melt are destroyed by pyrolysis, and gaseous contaminants released during the melting process are treated separately. Developed in 1980 by the U.S. Department of Energy's Pacific Northwest National Laboratory (PNNL), the GeoMelt process is deployed in one of two ways: in-situ (in-place) treatment of buried radioactive and hazardous wastes, and In-Container Vitrification (ICV), which is ex-situ treatment where radioactive and hazardous wastes are vitrified in a refractory-lined steel container. (en)
  • La vitrification est un procédé de transformation par solidification, ou par mélange avec un additif, d'un matériau en un solide amorphe, semblable à du verre et dépourvu de toute structure cristalline. Par exemple quand le saccharose est refroidi lentement il devient du sucre cristallisé, ou du sucre candi, alors qu'un refroidissement rapide le transforme en un sucre sirupeux, avec lequel on confectionne des sucettes ou de la barbe à papa. Ayant comme matériau de départ un solide, la vitrification exige généralement que l’on chauffe les substances à très haute température : la céramique est fabriquée de cette façon. La vitrification peut aussi se produire naturellement, comme quand la foudre tombe sur du sable : la chaleur intense et brutale peut créer une cavité, de forme tubulaire, appelée fulgurite. Elle a lieu durant diverses phénomènes, allant du béton du pas de tir de fusées aux êtres vivants victimes d'éruptions volcaniques. (fr)
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  • GeoMelt is a process by which dangerous, contaminated material (such as radioactive waste and heavy metals) is mixed with clean soil, a blend of industrial minerals, and/or glass frit and melted to create an extremely hard and leach-resistant glass product. Vitrification immobilizes nearly all of the inorganic contaminants (i.e., radionuclides and heavy metals) present in the initial mixture by incorporation into the glass matrix. Organic wastes in the melt are destroyed by pyrolysis, and gaseous contaminants released during the melting process are treated separately. (en)
  • La vitrification est un procédé de transformation par solidification, ou par mélange avec un additif, d'un matériau en un solide amorphe, semblable à du verre et dépourvu de toute structure cristalline. Par exemple quand le saccharose est refroidi lentement il devient du sucre cristallisé, ou du sucre candi, alors qu'un refroidissement rapide le transforme en un sucre sirupeux, avec lequel on confectionne des sucettes ou de la barbe à papa. (fr)
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  • Geomelting (en)
  • Vitrification (inertage) (fr)
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