Process for removing metals from water

Patent · Mon Jun 29 00:00:00 EDT 1987

OSTI ID:6874265

Napier, J M; Hancher, C M; Hackett, G D

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 containing floc, and postfiltering the resultant solution. The postfiltered solution may optionally be eluted through an ion exchange resin to remove residual metal ions. 2 tabs.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: TIC; EDB-88-177943
• Patent Number(s): PATENTS-US-A6067073
• OSTI ID: 6874265
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
INDUSTRIAL WASTES
WATER TREATMENT
METALS
REMOVAL
FILTERS
FILTRATION
FLOCCULATION
INVENTIONS
ION EXCHANGE MATERIALS
OXYGEN
PH VALUE
SULFIDES
CHALCOGENIDES
ELEMENTS
MATERIALS
NONMETALS
PRECIPITATION
SEPARATION PROCESSES
SULFUR COMPOUNDS
WASTES
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)