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

Patent ·
OSTI ID:869771
 [1]
  1. Woodridge, IL
+ Show Author Affiliations

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL
DOE Contract Number:
W-31109-ENG-38
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 5395532
OSTI ID:
869771
Country of Publication:
United States
Language:
English

References (1)

Partitioning of Polymeric Plutonium(IV) in Winsor II Microemulsion Systems journal September 1992

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/210/
40
added
aggregates
alkoxide
alkoxide compound
alkoxide compounds
allowing
approximately
aqueous
aqueous waste
average
colloids
combination
compounds
contacted
contain
containing
emulsion phase
encapsulation
extracted
extracting
extracting metal
extracting metals
extraction
extraction method
hydrous
hydrous metal
individual
individual particle
inverted
lastly
liquid extract
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liquid--liquid
metal
metal alkoxide
metal colloids
metal-silicate
metals
method
micelles
microemulsion
moving metal
nanometers
network
now-encapsulated
oxide
oxide compounds
particle
particle size
particle sizes
particles
phase
precipitated
provided
removing
removing metal
removing metals
silicon
silicon oxide
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solvent
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term
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waste
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water-in-oil
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