Process for removing metals from water

Patent · Sat Dec 31 23:00:00 EST 1988

OSTI ID:866885

Napier, John M ^[1]; Hancher, Charles M ^[1]; Hackett, Gail D ^[2]

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1. Oak Ridge, TN
2. Knoxville, TN

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.

• Research Organization: LOCKHEED MARTIN ENRGY SYST INC
• DOE Contract Number: AC05-84OR21400
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4814091
• OSTI ID: 866885
• Country of Publication: United States
• Language: English

Related Subjects

/210/
adding
adding water
adjusting
agent
amount
dissolved
dissolved oxygen
eluted
exchange
exchange resin
floc
flocculating
forming metal
forming metals
hydroxide-forming
including
increasing
insoluble
metal
metals
moving metal
optionally
oxygen
ph
postfiltered
postfiltering
precipitate
precipitate-containing
prefiltering
process
reducing
remove
remove residual
removing
removing metal
removing metals
residual
resin
resultant
resultant solution
separating
solids
solution
steps
sulfide
sulfide-
water
water including
water-soluble