Method of using pulsed ozone to treat soils containing organic contaminants
US7427177B2 · kind B2 · utility
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14References
28Claims
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Key dates
| Filing date | Aug 31, 2005 |
| Grant date | Sep 23, 2008 |
| Priority date | — |
| Expiry date | Aug 31, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/78
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of treating a solid matrix containing organic contaminants is provided. The method comprises the steps of a) injecting ozone into the solid matrix for a period of time known as the pulse duration; b) interrupting the injection of ozone into the solid matrix for a period of time known as the gap duration; and c) repeating step a) at least one additional time. Gap durations of from about 2 hours to about 48 hours are disclosed. Pulse durations of from about 0.25 hours to about 8 hours are also disclosed. Recalcitrant organic contaminants are treated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.