Process for removing metals from water
Abstract
A process for removing metals from water including the steps of prefiltering solids from the water, adjusting the pH to between about 2 and 3, reducing the amount of dissolved oxygen in the water, increasing the pH to between about 6 and 8, adding water-soluble sulfide to precipitate insoluble sulfide- and hydroxide-forming metals, adding a flocculating agent, separating precipitate-containing floc, and postfiltering the resultant solution. The postfiltered solution may optionally be eluted through an ion exchange resin to remove residual metal ions.
- Inventors:
-
- Oak Ridge, TN
- Knoxville, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 866885
- Patent Number(s):
- 4814091
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- process; removing; metals; water; including; steps; prefiltering; solids; adjusting; ph; reducing; amount; dissolved; oxygen; increasing; adding; water-soluble; sulfide; precipitate; insoluble; sulfide-; hydroxide-forming; flocculating; agent; separating; precipitate-containing; floc; postfiltering; resultant; solution; postfiltered; optionally; eluted; exchange; resin; remove; residual; metal; removing metals; removing metal; forming metal; dissolved oxygen; remove residual; exchange resin; moving metal; adding water; resultant solution; water including; forming metals; /210/
Citation Formats
Napier, John M, Hancher, Charles M, and Hackett, Gail D. Process for removing metals from water. United States: N. p., 1989.
Web.
Napier, John M, Hancher, Charles M, & Hackett, Gail D. Process for removing metals from water. United States.
Napier, John M, Hancher, Charles M, and Hackett, Gail D. Sun .
"Process for removing metals from water". United States. https://www.osti.gov/servlets/purl/866885.
@article{osti_866885,
title = {Process for removing metals from water},
author = {Napier, John M and Hancher, Charles M and Hackett, Gail D},
abstractNote = {A process for removing metals from water including the steps of prefiltering solids from the water, adjusting the pH to between about 2 and 3, reducing the amount of dissolved oxygen in the water, increasing the pH to between about 6 and 8, adding water-soluble sulfide to precipitate insoluble sulfide- and hydroxide-forming metals, adding a flocculating agent, separating precipitate-containing floc, and postfiltering the resultant solution. The postfiltered solution may optionally be eluted through an ion exchange resin to remove residual metal ions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}
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