Electrokinetic electrode system for extraction of soil contaminants from unsaturated soils
US5435895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1994 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Jul 29, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C2101/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There is presented an electrokinetic electrode assembly for use in extraction of soil contaminants from unsaturated soil in situ. The assembly includes a housing for retaining a liquid comprising an electrolyte solution, pure water, and soil water, the housing being in part of porous material capable of holding a vacuum. An electrode is mounted in the housing. The housing is provided with a vacuum orifice for effecting a vacuum within the housing selectively to control flow of soil water through the housing into the chamber and to control outflow of the liquid from the chamber. The assembly further includes conduit means for removing the liquid from the housing and returning the electrolyte solution to the housing, and a conduit for admitting pure water to the housing. There is further presented an electrode system and method for extraction of soil contaminants, the system and method utilizing at least two electrode assemblies as described above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.