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Title: Iron phosphate compositions for containment of hazardous metal waste

Abstract

An improved iron phosphate waste form for the vitrification, containment and long-term disposition of hazardous metal waste such as radioactive nuclear waste is provided. The waste form comprises a rigid iron phosphate matrix resulting from the cooling of a melt formed by heating a batch mixture comprising the metal waste and a matrix-forming component. The waste form comprises from about 30 to about 70 weight percent P.sub.2 O.sub.5 and from about 25 to about 50 weight percent iron oxide and has metals present in the metal waste chemically dissolved therein. The concentration of iron oxide in the waste form along with a high proportion of the iron in the waste form being present as Fe.sup.3+ provide a waste form exhibiting improved chemical resistance to corrosive attack. A method for preparing the improved iron phosphate waste forms is also provided.

Inventors:
 [1]
  1. (Rolla, MO)
Issue Date:
Research Org.:
BATTELLE MEMORIAL INSTITUTE
OSTI Identifier:
871540
Patent Number(s):
5750824
Assignee:
Curators of University of Missouri (Columbia, MO) PNNL
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
iron; phosphate; compositions; containment; hazardous; metal; waste; improved; form; vitrification; long-term; disposition; radioactive; nuclear; provided; comprises; rigid; matrix; resulting; cooling; melt; formed; heating; batch; mixture; comprising; matrix-forming; component; 30; 70; weight; percent; 25; 50; oxide; metals; chemically; dissolved; therein; concentration; proportion; provide; exhibiting; chemical; resistance; corrosive; attack; method; preparing; forms; chemical resistance; metal waste; iron phosphate; radioactive nuclear; waste form; dissolved therein; weight percent; iron oxide; nuclear waste; mixture comprising; waste forms; phosphate waste; percent iron; exhibiting improved; hazardous metal; corrosive attack; improved iron; improved chemical; /588/65/501/976/

Citation Formats

Day, Delbert E. Iron phosphate compositions for containment of hazardous metal waste. United States: N. p., 1998. Web.
Day, Delbert E. Iron phosphate compositions for containment of hazardous metal waste. United States.
Day, Delbert E. Thu . "Iron phosphate compositions for containment of hazardous metal waste". United States. https://www.osti.gov/servlets/purl/871540.
@article{osti_871540,
title = {Iron phosphate compositions for containment of hazardous metal waste},
author = {Day, Delbert E.},
abstractNote = {An improved iron phosphate waste form for the vitrification, containment and long-term disposition of hazardous metal waste such as radioactive nuclear waste is provided. The waste form comprises a rigid iron phosphate matrix resulting from the cooling of a melt formed by heating a batch mixture comprising the metal waste and a matrix-forming component. The waste form comprises from about 30 to about 70 weight percent P.sub.2 O.sub.5 and from about 25 to about 50 weight percent iron oxide and has metals present in the metal waste chemically dissolved therein. The concentration of iron oxide in the waste form along with a high proportion of the iron in the waste form being present as Fe.sup.3+ provide a waste form exhibiting improved chemical resistance to corrosive attack. A method for preparing the improved iron phosphate waste forms is also provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

Patent:

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