Leach resistance of encapsulated salts in polymeric waste forms fabricated using an aqueous-based route

Anh Quach, Gordon Xia, Rachel Evans, A. Eduardo Sáez, Brian J. Zelinski, Harry Smith, Gary Smith, Dunbar P. Birnie, Wendell P. Ela

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)341-349
Number of pages9
JournalCeramic Transactions
Volume155
Publication statusPublished - Dec 1 2004
EventScience 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 2003Apr 30 2003

    Fingerprint

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Quach, A., Xia, G., Evans, R., Sáez, A. E., Zelinski, B. J., Smith, H., Smith, G., Birnie, D. P., & Ela, W. P. (2004). Leach resistance of encapsulated salts in polymeric waste forms fabricated using an aqueous-based route. Ceramic Transactions, 155, 341-349.