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

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. 21 figs.

Inventors:
Issue Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
644371
Patent Number(s):
5750824
Application Number:
PAN: 8-606,539; CNN: Contract 214582-A-L2
Assignee:
Univ. of Missouri, Columbia, MO (United States)
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 12 May 1998
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; HAZARDOUS MATERIALS; RADIOACTIVE WASTE PROCESSING; IRON PHOSPHATES; INDUSTRIAL WASTES; WASTE MANAGEMENT; METALS

Citation Formats

Day, D E. Iron phosphate compositions for containment of hazardous metal waste. United States: N. p., 1998. Web.
Day, D E. Iron phosphate compositions for containment of hazardous metal waste. United States.
Day, D E. Tue . "Iron phosphate compositions for containment of hazardous metal waste". United States.
@article{osti_644371,
title = {Iron phosphate compositions for containment of hazardous metal waste},
author = {Day, D 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. 21 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {5}
}