Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1997-04-10
2000-04-04
Lovering, Richard D.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
8111, 210763, 210909, 25218638, 25218639, 25218641, 25240053, 428541, 588218, A62D 300, C02F 172, C02F 178
Patent
active
060463759
ABSTRACT:
A method of forming reactive oxygen species by solubilizing a metal ion from a metal oxy(hydr)oxide compound with an iron oxy(hydr)oxide solubilizing chelator to yield a first soluble metal ion chelate complex. The metal ion is transferred from the chelate complex to a free redox cycling chelator to form a second metal ion chelate complex which reduces the metal ion to a reduced metal species. The reduced metal species is reacted with an oxygen containing oxidant to yield a free redox cycling chelator and a reactive oxygen species. The reactive oxygen species may be used to oxidize a target substrate. The preferred metal ion is a cationic transition metal, such as iron or manganese. A preferred iron oxy(hydr)oxide solubilizing chelator is oxalic acid. The method is generally performed at acidic pH. Also provided is a method of protecting an organic composition from reactive oxygen species comprising impregnating the composition with a redox cycling chelator able to form a reduced metal ion chelate complex with a metal ion, the chelator present in an amount sufficient to protect the composition from degradation from reactive oxygen species such as hydroxyl radical or superoxide anion.
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Goodell Barry S.
Jellison Jody L.
Krishnamurthy Srinivasan
Liu Jing
Lovering Richard D.
The Board of Trustees University of Main System
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