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Title: Method for Producing Chemically Bonded Phosphate Ceramics and for Stabilizing Contaminants Encapsulated therein Utilizing Reducing Agents

Abstract

Known phosphate ceramic formulations are improved and the ability to produce iron-based phosphate ceramic systems is enabled by the addition of an oxidizing or reducing step during the acid-base reactions that form the phosphate ceramic products. The additives allow control of the rate of the acid-base reactions and concomitant heat generation. In an alternate embodiment, waste containing metal anions is stabilized in phosphate ceramic products by the addition of a reducing agent to the phosphate ceramic mixture. The reduced metal ions are more stable and/or reactive with the phosphate ions, resulting in the formation of insoluble metal species within the phosphate ceramic matrix, such that the resulting chemically bonded phosphate ceramic product has greater leach resistance.

Inventors:
; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
782750
Patent Number(s):
PATENTS-US-A9305820
Application Number:
9-305,820; TRN: AH200128%%83
Assignee:
DOEGC; EDB-01:070297
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent Application
Resource Relation:
Patent File Date: 1999 May 05; Other Information: PBD: 5 May 1999
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ADDITIVES; CERAMICS; PHOSPHATES; REDUCING AGENTS; ENCAPSULATION; FABRICATION; WASTE FORMS; CORROSION RESISTANCE

Citation Formats

Singh, Dileep, Wagh, Arun S., and Jeong, Seung-Young. Method for Producing Chemically Bonded Phosphate Ceramics and for Stabilizing Contaminants Encapsulated therein Utilizing Reducing Agents. United States: N. p., 1999. Web.
Singh, Dileep, Wagh, Arun S., & Jeong, Seung-Young. Method for Producing Chemically Bonded Phosphate Ceramics and for Stabilizing Contaminants Encapsulated therein Utilizing Reducing Agents. United States.
Singh, Dileep, Wagh, Arun S., and Jeong, Seung-Young. Wed . "Method for Producing Chemically Bonded Phosphate Ceramics and for Stabilizing Contaminants Encapsulated therein Utilizing Reducing Agents". United States. https://www.osti.gov/servlets/purl/782750.
@article{osti_782750,
title = {Method for Producing Chemically Bonded Phosphate Ceramics and for Stabilizing Contaminants Encapsulated therein Utilizing Reducing Agents},
author = {Singh, Dileep and Wagh, Arun S. and Jeong, Seung-Young},
abstractNote = {Known phosphate ceramic formulations are improved and the ability to produce iron-based phosphate ceramic systems is enabled by the addition of an oxidizing or reducing step during the acid-base reactions that form the phosphate ceramic products. The additives allow control of the rate of the acid-base reactions and concomitant heat generation. In an alternate embodiment, waste containing metal anions is stabilized in phosphate ceramic products by the addition of a reducing agent to the phosphate ceramic mixture. The reduced metal ions are more stable and/or reactive with the phosphate ions, resulting in the formation of insoluble metal species within the phosphate ceramic matrix, such that the resulting chemically bonded phosphate ceramic product has greater leach resistance.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {5}
}

Patent Application:

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