Chemical oxidation of volatile organic compounds
First Claim
1. A method for oxidizing volatile organic compounds in soil comprising:
- a. introducing solid phase water soluble persulfate compound to the soil to substantially satisfy a soil oxidant demand;
b. introducing a permanganate into the soil; and
c. oxidizing volatile organic compounds in the soil with the permanganate.
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Accused Products
Abstract
Volatile organic compounds are removed from contaminated soil by introducing one or both of a water soluble peroxygen compound, such as a persulfate, and a permanganate into the soil, either in situ or ex situ, in amounts and under conditions wherein both the soil oxidant demand is satisfied and volatile organic compounds in the soil are oxidized. In a preferred embodiment, when both are used, the peroxygen satisfies the soil oxidant demand and the permanganate oxidizes the volatile organic compounds. Sodium persulfate is the preferred persulfate and potassium permanganate is preferred permanganate. The persulfate and the permanganate may be added to the soil sequentially, or may be mixed together and added as an aqueous solution.
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Citations
28 Claims
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1. A method for oxidizing volatile organic compounds in soil comprising:
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a. introducing solid phase water soluble persulfate compound to the soil to substantially satisfy a soil oxidant demand;
b. introducing a permanganate into the soil; and
c. oxidizing volatile organic compounds in the soil with the permanganate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. The method for oxidizing volatile organic compounds in an identified volume of soil, comprising:
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introducing at least permanganate to the soil in amounts and under conditions sufficient;
to satisfy substantially all the soil oxidant demand and to oxidize the volatile organic compounds in the soil volume. - View Dependent Claims (14, 15, 16, 17)
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18. A method for oxidizing subsurface volatile organic compounds in groundwater, comprising:
creating one or more zones of material in the path of the groundwater, the zones having sufficient permeability to allow the groundwater to pass through the zones, wherein creating the zones of material includes introducing permanganate into the material to form manganese dioxide precipitate within the material of the zones to react with and oxidize the volatile organic compounds within the groundwater passing through the zones, the manganese dioxide precipitate being formed in sufficient quantity to reduce the quantity of the volatile organic compounds in the groundwater passing through the zones wherein the permanganate is potassium based, sodium based, or calcium based, or a combination thereof. - View Dependent Claims (19)
- 20. A method for the in situ oxidizing of volatile organic compounds in a volume of soil by introducing persulfate into the volume of soil, followed by heating the soil to form sulfate free radicals in sufficient quantities to oxidize the volatile organic compounds in the volume of soil.
- 25. A method for oxidizing volatile organic compounds in a volume of soil by introducing into the volume of soil an aqueous solution of permanganate and persulfate and heating the soil to form sulfate free radicals, wherein the volatile organic compounds in the soil are oxidized.
Specification