In situ immobilization of subsurface contamination
US7670085B2 · kind B2 · utility
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3References
24Claims
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Key dates
| Filing date | Nov 28, 2006 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Dec 5, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C1/005
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Vertical migration of a plume of subsurface contamination in the vadose zone to the groundwater is prevented by forming and maintaining one or more desiccation layers in the vadose zone in or above a layer of contamination. Horizontal barrier layers are produced by injecting dry air at a specific elevation in one borehole and removing the air at another borehole. These horizontal layers act as an impermeable barrier to the vertical migration of dissolved contaminants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.