Method of waste stabilization with dewatered chemically bonded phosphate ceramics
Abstract
A method of stabilizing a waste in a chemically bonded phosphate ceramic (CBPC). The method consists of preparing a slurry including the waste, water, an oxide binder, and a phosphate binder. The slurry is then allowed to cure to a solid, hydrated CBPC matrix. Next, bound water within the solid, hydrated CBPC matrix is removed. Typically, the bound water is removed by applying heat to the cured CBPC matrix. Preferably, the quantity of heat applied to the cured CBPC matrix is sufficient to drive off water bound within the hydrated CBPC matrix, but not to volatalize other non-water components of the matrix, such as metals and radioactive components. Typically, a temperature range of between 100.degree. C.-200.degree. C. will be sufficient. In another embodiment of the invention wherein the waste and water have been mixed prior to the preparation of the slurry, a select amount of water may be evaporated from the waste and water mixture prior to preparation of the slurry. Another aspect of the invention is a direct anyhydrous CBPC fabrication method wherein water is removed from the slurry by heating and mixing the slurry while allowing the slurry to cure. Additional aspects of the invention are ceramic matrixmore »
- Inventors:
- Issue Date:
- Research Org.:
- CH2M Hill, Inc., Englewood, CO (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1176405
- Patent Number(s):
- 7745679
- Application Number:
- 10/547,445
- Assignee:
- CH2M Hill, Inc. (Englewood, CO)
- Patent Classifications (CPCs):
-
G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
- DOE Contract Number:
- W-31-109-ENG-38
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2004 Feb 26
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Wagh, Arun, and Maloney, Martin D. Method of waste stabilization with dewatered chemically bonded phosphate ceramics. United States: N. p., 2010.
Web.
Wagh, Arun, & Maloney, Martin D. Method of waste stabilization with dewatered chemically bonded phosphate ceramics. United States.
Wagh, Arun, and Maloney, Martin D. Tue .
"Method of waste stabilization with dewatered chemically bonded phosphate ceramics". United States. https://www.osti.gov/servlets/purl/1176405.
@article{osti_1176405,
title = {Method of waste stabilization with dewatered chemically bonded phosphate ceramics},
author = {Wagh, Arun and Maloney, Martin D.},
abstractNote = {A method of stabilizing a waste in a chemically bonded phosphate ceramic (CBPC). The method consists of preparing a slurry including the waste, water, an oxide binder, and a phosphate binder. The slurry is then allowed to cure to a solid, hydrated CBPC matrix. Next, bound water within the solid, hydrated CBPC matrix is removed. Typically, the bound water is removed by applying heat to the cured CBPC matrix. Preferably, the quantity of heat applied to the cured CBPC matrix is sufficient to drive off water bound within the hydrated CBPC matrix, but not to volatalize other non-water components of the matrix, such as metals and radioactive components. Typically, a temperature range of between 100.degree. C.-200.degree. C. will be sufficient. In another embodiment of the invention wherein the waste and water have been mixed prior to the preparation of the slurry, a select amount of water may be evaporated from the waste and water mixture prior to preparation of the slurry. Another aspect of the invention is a direct anyhydrous CBPC fabrication method wherein water is removed from the slurry by heating and mixing the slurry while allowing the slurry to cure. Additional aspects of the invention are ceramic matrix waste forms prepared by the methods disclosed above.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {6}
}
Works referenced in this record:
Chemically Bonded Phosphate Ceramics: II, Warm-Temperature Process for Alumina Ceramics
journal, November 2003
- Wagh, Arun S.; Grover, Susan; Jeong, Seung Y.
- Journal of the American Ceramic Society, Vol. 86, Issue 11
Bonding in Aluminum Phosphate Ceramics Prepared At Low Temperatures
journal, January 1987
- Silsbee, Michael R.; Roy, D. M.
- MRS Proceedings, Vol. 114