Contaminant adsorption and oxidation via the Fenton reaction
AssigneesU.S. Environmental Protection Agency, University of Arizona
InventorsScott G. Huling, Robert G. Arnold, Raymond A. Sierka
Life of this patent
Estimating the term…
Abstract
Contaminated water is treated by adsorbing contaminant onto a sorbent to concentrate the contaminant and then oxidizing the contaminant via the Fenton and related reactions. Iron is attached to the sorbent or can be added in solution with an oxidant. Both systems, iron attached to the sorbent or iron in solution, can be used to oxidize contaminants on or near the surface of the sorbent. The process can be used to treat contaminated water in above-ground and below-ground treatment systems.
Claims19
A process for treating contaminants in water comprising:
- concentrating the contaminants by passing water containing contaminants through a sorbent amended with or containing iron to which the contaminants adsorb and are concentrated, and
- adding an oxidant which produces hydroxyl radicals at the sorbent whereby the contaminants are oxidized using a Fenton-driven mechanism and are destroyed in situ, and the sorbent is regenerated in situ.
A process for treating contaminants in water comprising:
- concentrating the contaminants in the water by passing the water containing contaminants through a sorbent to which the contaminants adsorb and are concentrated;
- adding a composition comprising iron and an oxidant to the sorbent whereby the contaminants are oxidized using a Fenton-driven mechanism and are destroyed in situ, and the sorbent is regenerated in situ.
A process for treating contaminants in water consisting essentially of:
- passing water containing contaminants which can be oxidized by a hydroxyl ion through a sorbent amended with or containing iron to which the contaminants adsorb and are concentrated;
- and
- adding an oxidant which produces hydroxyl radicals at the sorbent, whereby the contaminants are oxidized using a Fenton-driven mechanism and are destroyed in situ, and the sorbent is regenerated in situ.
Dependencies are inferred from the claim text.