Method for fixating sludges and soils contaminated with mercury and other heavy metals
US6911570B2 · kind B2 · utility
3Cited by
210References
82Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2001 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Aug 25, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09B2101/30
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention relates to a method, composition and apparatus for stabilizing mercury and other heavy metals present in a particulate material such that the metals will not leach from the particulate material. The method generally involves the application of a metal reagent, a sulfur-containing compound, and the addition of oxygen to the particulate material, either through agitation, sparging or the addition of an oxygen-containing compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.