Method for producing chemically bonded phosphate ceramics and for stabilizing contaminants encapsulated therein utilizing reducing agents

Singh, Dileep; Wagh, Arun S; Jeong, Seung-Young

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Title: Method for producing chemically bonded phosphate ceramics and for stabilizing contaminants encapsulated therein utilizing reducing agents

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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:

Singh, Dileep ^[1]; Wagh, Arun S ^[2]; Jeong, Seung-Young ^[3]

Naperville, IL
Orland Park, IL
Westmont, IL

Issue Date:: Sat Jan 01 00:00:00 EST 2000

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States)

OSTI Identifier:: 873316

Patent Number(s):: 6133498

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: A - HUMAN NECESSITIES A62 - LIFE-SAVING A62D - CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS

C - CHEMISTRY C03 - GLASS C03C - CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS

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A - HUMAN NECESSITIES A62 - LIFE-SAVING A62D - CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS
A62D2101/24 - containing heavy metals
A62D2101/43 - containing heavy metals, in the bonded or free state
A62D2203/04 - Combined processes involving two or more non-distinct steps covered by groups A62D3/10 - A62D3/40
A62D3/33 - by chemical fixing the harmful substance, e.g. by chelation or complexation
A62D3/37 - by reduction, e.g. hydrogenation

C - CHEMISTRY C03 - GLASS C03C - CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS
C03C1/002 - {Use of waste materials, e.g. slags}
C03C10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
C03C14/00 - Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix
C03C2214/14 - Waste material, e.g. to be disposed of

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B14/30 - Oxides other than silica {
C04B14/308 - {Iron oxide}
C04B18/0463 - {Hazardous waste}
C04B20/02 - Treatment
C04B2103/002 - {Compounds of elements having a valency of 2}
C04B2103/0096 - {Reducing agents}
C04B22/0013 - {Boron compounds}
C04B22/08 - Acids or salts thereof {
C04B22/12 - containing halogen in the anion
C04B28/34 - containing cold phosphate binders
C04B40/0028 - {Aspects relating to the mixing step of the mortar preparation}

G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
G21F9/162 - {in an inorganic matrix, e.g. clays, zeolites}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02W - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
Y02W30/91 - Use of waste materials as fillers for mortars or concrete

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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/

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                    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.

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                    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.

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                    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.

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@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         = {Sat Jan 01 00:00:00 EST 2000},

  month        = {Sat Jan 01 00:00:00 EST 2000}

}

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