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Title: Method for extracting metals from aqueous waste streams for long term storage

Abstract

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 manometers.

Inventors:
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
94654
Patent Number(s):
8098920
Application Number:
ON: DE95017133; PAN: 8-098,920
Assignee:
Dept. of Energy
Patent Classifications (CPCs):
G - PHYSICS G06 - COMPUTING G06T - IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 1993 Jul 29; Other Information: PBD: 1993; Related Information: U. S. Patent No. 5,395,532. Filed 03/07/1995.
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ACTINIDES; RADIOACTIVE WASTE PROCESSING; RARE EARTHS; ENCAPSULATION; PLUTONIUM; SOLVENT EXTRACTION; COLLOIDS; SILICA; EMULSIONS; SILICATES

Citation Formats

Chaiko, D J. Method for extracting metals from aqueous waste streams for long term storage. United States: N. p., 1993. Web.
Chaiko, D J. Method for extracting metals from aqueous waste streams for long term storage. United States.
Chaiko, D J. Fri . "Method for extracting metals from aqueous waste streams for long term storage". United States. https://www.osti.gov/servlets/purl/94654.
@article{osti_94654,
title = {Method for extracting metals from aqueous waste streams for long term storage},
author = {Chaiko, D J},
abstractNote = {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 manometers.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}