Method for extracting metals from aqueous waste streams for long term storage
A liquid-liquid extraction method for removing metals and hydrous metal colloids from waste streams is provided wherein said waste streams are contacted with a solvent system containing a water-in-oil microemulsion wherein the inverted micelles contain the extracted metal. A silicon alkoxide, either alone or in combination with other metal alkoxide compounds is added to the water-in-oil microemulsion, thereby allowing encapsulation of the extracted metal within a silicon oxide network. Lastly, the now-encapsulated metal is precipitated from the water-in-oil microemulsion phase to yield aggregates of metal-silicate particles having average individual particle sizes of approximately 40 nanometers. 2 figs.
- Research Organization:
- Univ. of Chicago, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- US 5,395,532/A/
- Application Number:
- PAN: 8-098,920
- OSTI ID:
- 27699
- Resource Relation:
- Other Information: PBD: 7 Mar 1995
- Country of Publication:
- United States
- Language:
- English
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