Process for removing metals from water
Patent
·
OSTI ID:5858523
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.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4814091
- OSTI ID:
- 5858523
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
29 ENERGY PLANNING, POLICY, AND ECONOMY
290400 -- Energy Planning & Policy-- Energy Resources
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLOCCULATION
HYDROGEN COMPOUNDS
HYDROXIDES
ION EXCHANGE
MANAGEMENT
MATERIALS RECOVERY
METALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PH VALUE
POLYMERS
PRECIPITATION
PROCESSING
RECOVERY
RESINS
RESOURCE CONSERVATION
SEPARATION PROCESSES
SOLIDS
SULFIDES
SULFUR COMPOUNDS
TECHNOLOGY ASSESSMENT
WASTE MANAGEMENT
WASTE PROCESSING
WATER
WATER TREATMENT PLANTS
290400 -- Energy Planning & Policy-- Energy Resources
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLOCCULATION
HYDROGEN COMPOUNDS
HYDROXIDES
ION EXCHANGE
MANAGEMENT
MATERIALS RECOVERY
METALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PH VALUE
POLYMERS
PRECIPITATION
PROCESSING
RECOVERY
RESINS
RESOURCE CONSERVATION
SEPARATION PROCESSES
SOLIDS
SULFIDES
SULFUR COMPOUNDS
TECHNOLOGY ASSESSMENT
WASTE MANAGEMENT
WASTE PROCESSING
WATER
WATER TREATMENT PLANTS