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 Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• Assignee: TIC; EDB-88-177943
• Patent Number(s): PATENTS-US-A6067073
• OSTI ID: 6874265
• Country of Publication: United States
• Language: English

Related Subjects

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