In situ removal of contamination from soil
US5676819A · kind A · utility
5Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Apr 23, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C2101/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process of remediation of cationic heavy metal contamination from soil utilizes gas phase manipulation to inhibit biodegradation of a chelating agent that is used in an electrokinesis process to remove the contamination, and further gas phase manipulation to stimulate biodegradation of the chelating agent after the contamination has been removed. The process ensures that the chelating agent is not attacked by bioorganisms in the soil prior to removal of the contamination, and that the chelating agent does not remain as a new contaminant after the process is completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.