In-situ remediation of contaminated heterogeneous soils
US5476992A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1993 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Nov 17, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C2101/00
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for the in-situ remediation of a contaminated heterogeneous soil region comprising: (a) introducing material for treating contaminants in a contaminated heterogeneous soil region into at least one liquid permeable region within the contaminated heterogeneous soil region to form at least one treating zone within the contaminated heterogeneous soil region, (b) transmitting direct electric current through at least one low permeability soil region within the contaminated heterogeneous soil region between a first electrode and a second electrode having opposite charge, wherein (i) the first electrode is located at a first end of the contaminated heterogeneous soil region and the second electrode is located at the opposite end of the contaminated heterogeneous soil region or (ii) the first electrode is located at a first end of each of the low permeability soil regions and the second electrode is located at the opposite end of each of the low permeability soil regions, (1) to cause an electroosmotic flow from the second electrode to the first electrode, (2) to cause an electromigratory movement of ionic contaminants in a direction toward the electrode of opposite charge, or (3)…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.