The leaching behavior of a highly-soluble salt (sodium nitrate) encapsulated in novel polymeric waste forms was investigated. The waste forms are solid monoliths composed of cured blends of polystyrene-butadiene and an epoxy resin. The synthesis and encapsulation process are accomplished simultaneously via an aqueous-based route recently developed. Leaching of the salt was carried out by exposing sections of the waste forms to large volumes of well-stirred water. The measured time dependence of the leaching process is described quantitatively by a model based on the diffusion of the salt through the waste form. The results obtained suggest that diffusion occurs through limited but significant continuous porosity. Preliminary experiments indicate that this porosity may be reduced to improve leach resistance by the use of a post-curing heat treatment.
|Number of pages||9|
|Publication status||Published - Dec 1 2004|
|Event||Science and Technology in Addressing Environmental Issues in the Ceramic Industry and Ceramic Science and Technology for the Nuclear Industry Symposia at the American Ceramic Society 105th Annual Meeting and Exposition - Nashville, TN, United States|
Duration: Apr 27 2003 → Apr 30 2003
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry