skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

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 are 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:
 [1];  [2];  [3]
  1. (Naperville, IL)
  2. (Orland Park, IL)
  3. (Westmont, IL)
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
873316
Patent Number(s):
6133498
Assignee:
United States of America as represented by United States (Washington, DC) ANL
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; producing; chemically; bonded; phosphate; ceramics; stabilizing; contaminants; encapsulated; therein; utilizing; reducing; agents; ceramic; formulations; improved; ability; produce; iron-based; systems; enabled; addition; oxidizing; step; acid-base; reactions; form; products; additives; allow; control; rate; concomitant; heat; generation; alternate; embodiment; waste; containing; metal; anions; stabilized; agent; mixture; reduced; stable; reactive; resulting; formation; insoluble; species; matrix; product; leach; resistance; reducing agents; reduced metal; chemically bonded; ceramic products; ceramic product; ceramic matrix; phosphate ceramic; metal species; reducing agent; alternate embodiment; soluble metal; containing metal; waste containing; bonded phosphate; chemically bond; metal anions; heat generation; insoluble metal; encapsulated therein; metal anion; ceramic formulation; allow control; ceramic form; phosphate ceramics; /588/264/501/

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., 2000. 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. Sat . "Method for producing chemically bonded phosphate ceramics and for stabilizing contaminants encapsulated therein utilizing reducing agents". United States. https://www.osti.gov/servlets/purl/873316.
@article{osti_873316,
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 are 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 = {2000},
month = {1}
}

Patent:

Save / Share: