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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 nanometers.

Inventors:
 [1]
  1. Woodridge, IL
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
869771
Patent Number(s):
5395532
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; extracting; metals; aqueous; waste; streams; term; storage; liquid-liquid; extraction; removing; hydrous; metal; colloids; provided; contacted; solvent; containing; water-in-oil; microemulsion; inverted; micelles; contain; extracted; silicon; alkoxide; combination; compounds; added; allowing; encapsulation; oxide; network; lastly; now-encapsulated; precipitated; phase; yield; aggregates; metal-silicate; particles; average; individual; particle; sizes; approximately; 40; nanometers; removing metals; removing metal; term storage; extracting metal; individual particle; metal alkoxide; waste stream; particle size; silicon oxide; waste streams; hydrous metal; particle sizes; aqueous waste; moving metal; alkoxide compound; oxide compounds; extraction method; liquid extract; metal colloids; extracting metals; emulsion phase; liquid extraction; alkoxide compounds; /210/

Citation Formats

Chaiko, David J. Method for extracting metals from aqueous waste streams for long term storage. United States: N. p., 1995. Web.
Chaiko, David J. Method for extracting metals from aqueous waste streams for long term storage. United States.
Chaiko, David J. Sun . "Method for extracting metals from aqueous waste streams for long term storage". United States. https://www.osti.gov/servlets/purl/869771.
@article{osti_869771,
title = {Method for extracting metals from aqueous waste streams for long term storage},
author = {Chaiko, David 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 nanometers.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}

Patent:

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