Chemical oxidation of volatile organic compounds

B - Operations – Transporting – 09 – C

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B09C 1/08 (2006.01) E02B 13/00 (2006.01) B01D 1/00 (2006.01)

Patent

CA 2331630

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.

Pour éliminer des composés organiques volatiles d'un sol contaminé, on introduit dans le sol un composé de peroxyde soluble dans l'eau, tel qu'un persulfate, et/ou un permanganate, soit in situ soit ex situ, selon des quantités et dans des conditions où les besoins du sol en oxydant sont satisfaits et où les composés organiques volatiles dans sol sont oxydés. Dans une réalisation préférée, lors de l'utilisation de ces deux éléments, le peroxyde satisfait aux besoins du sol en oxydant, et le permanganate oxyde les composés organiques volatiles. Le persulfate préféré est le persulfate de sodium, le permanganate préféré étant le permanganate de potassium. Le persulfate et le permanganate peuvent soit être introduits dans le sol de manière séquentielle, soit être mélangés l'un à l'autre et introduits sous forme de solution aqueuse.

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