Radiation Effects in Zeolites and Clays for the Sorption and Release of Radionuclides During Transport Through the Geosphere
Site restoration activities at DOE facilities and the permanent disposal of nuclear waste generated at DOE facilities involve working with and within various types and levels of radiation fields. The radiation exposure due to the release and sorption of long-lived actinides (e.g., 237Np) and fission products (e.g., 137Cs and 90Sr) may cause changes in important properties of geological materials along transport pathways of radionuclides through the geosphere. Through a comprehensive study of the microstructure and ion exchange capacity under varying types of irradiation (electrons, ions and neutrons), dose rate, temperature and ion exchange conditions, we have developed a basic understanding of radiation effects on the ion exchange and retention capacity of clays and zeolites for Cs and Sr. The results provide an essential database for the long term effectiveness of clays and zeolite in radionuclide retention, as well as the mobility of the radionuclides in contaminated sites.
- Research Organization:
- University of Michigan, Ann Arbor, MI (US)
- Sponsoring Organization:
- USDOE Office of Science (SC) (US)
- OSTI ID:
- 826234
- Resource Relation:
- Conference: 226th American Chemical Society Meeting, New York, NY (US), 09/07/2003--09/11/2003; Other Information: PBD: 11 Sep 2003
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACTINIDES
CLAYS
DOSE RATES
ELECTRONS
FISSION PRODUCTS
ION EXCHANGE
IRRADIATION
MICROSTRUCTURE
NEUTRONS
RADIATION EFFECTS
RADIATIONS
RADIOACTIVE WASTES
RADIOISOTOPES
RETENTION
SORPTION
ZEOLITES