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Title: Method for acid oxidation of radioactive, hazardous, and mixed organic waste materials

Abstract

The present invention is directed to a process for reducing the volume of low level radioactive and mixed waste to enable the waste to be more economically stored in a suitable repository, and for placing the waste into a form suitable for permanent disposal. The invention involves a process for preparing radioactive, hazardous, or mixed waste for storage by contacting the waste starting material containing at least one organic carbon-containing compound and at least one radioactive or hazardous waste component with nitric acid and phosphoric acid simultaneously at a contacting temperature in the range of about 140.degree. C. to about 210 .degree. C. for a period of time sufficient to oxidize at least a portion of the organic carbon-containing compound to gaseous products, thereby producing a residual concentrated waste product containing substantially all of said radioactive or inorganic hazardous waste component; and immobilizing the residual concentrated waste product in a solid phosphate-based ceramic or glass form.

Inventors:
 [1];  [2];  [1];  [1];  [3]
+ Show Inventor Affiliations
  1. Aiken, SC
  2. Corrales, NM
  3. Folly Beach, SC
Issue Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States)
OSTI Identifier:
872557
Patent Number(s):
5960368
Assignee:
Westinghouse Savannah River Company (Aiken, SC)
Patent Classifications (CPCs):
A - HUMAN NECESSITIES A62 - LIFE-SAVING A62D - CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS
G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
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DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; acid; oxidation; radioactive; hazardous; mixed; organic; waste; materials; directed; process; reducing; volume; level; enable; economically; stored; suitable; repository; placing; form; permanent; disposal; involves; preparing; storage; contacting; starting; material; containing; carbon-containing; compound; component; nitric; phosphoric; simultaneously; temperature; range; 140; degree; 210; period; time; sufficient; oxidize; portion; gaseous; products; producing; residual; concentrated; product; substantially; inorganic; immobilizing; solid; phosphate-based; ceramic; glass; organic carbon; concentrated waste; waste product; containing compound; permanent disposal; mixed waste; starting material; hazardous waste; time sufficient; nitric acid; waste material; waste materials; phosphoric acid; gaseous product; organic waste; material containing; gaseous products; product containing; level radioactive; preparing radioactive; residual concentrated; based ceramic; mixed organic; form suitable; containing substantially; waste starting; carbon-containing compound; duct containing; containing substantial; /588/210/

Citation Formats

Pierce, Robert A, Smith, James R, Ramsey, William G, Cicero-Herman, Connie A, and Bickford, Dennis F. Method for acid oxidation of radioactive, hazardous, and mixed organic waste materials. United States: N. p., 1999. Web.
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Pierce, Robert A, Smith, James R, Ramsey, William G, Cicero-Herman, Connie A, & Bickford, Dennis F. Method for acid oxidation of radioactive, hazardous, and mixed organic waste materials. United States.
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Pierce, Robert A, Smith, James R, Ramsey, William G, Cicero-Herman, Connie A, and Bickford, Dennis F. Fri . "Method for acid oxidation of radioactive, hazardous, and mixed organic waste materials". United States. https://www.osti.gov/servlets/purl/872557.
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@article{osti_872557,
title = {Method for acid oxidation of radioactive, hazardous, and mixed organic waste materials},
author = {Pierce, Robert A and Smith, James R and Ramsey, William G and Cicero-Herman, Connie A and Bickford, Dennis F},
abstractNote = {The present invention is directed to a process for reducing the volume of low level radioactive and mixed waste to enable the waste to be more economically stored in a suitable repository, and for placing the waste into a form suitable for permanent disposal. The invention involves a process for preparing radioactive, hazardous, or mixed waste for storage by contacting the waste starting material containing at least one organic carbon-containing compound and at least one radioactive or hazardous waste component with nitric acid and phosphoric acid simultaneously at a contacting temperature in the range of about 140.degree. C. to about 210 .degree. C. for a period of time sufficient to oxidize at least a portion of the organic carbon-containing compound to gaseous products, thereby producing a residual concentrated waste product containing substantially all of said radioactive or inorganic hazardous waste component; and immobilizing the residual concentrated waste product in a solid phosphate-based ceramic or glass form.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1999},
month = {Fri Jan 01 00:00:00 EST 1999}
}
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