Recovery of chromium from plating wastes
Conference
·
· Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)
OSTI ID:6326017
Recovery of chromium from a plating sludge is discussed. The process consists of two parts: roasting the sludge with sodium carbonate (Na/sub 2/CO/sub 3/) andcalcium oxide (CaO), followed by leaching. The optimal parameters for roasting are a temperature range of 950 to 1000/sup 0/C and Na/sub 2/CO/sub 3/ and CaO contents of 2.4 and 2.8 mol per mole of chromium oxide (Cr/sub 2/O/sub 3/) respectively. Demineralized water is recommended for the leaching of sodium chromate (Na/sub 2/CrO/sub 4/) from the agglomerate formed during roasting. The leached water is recycled through a strongly acidic cation exchanger followed by a weakly basic anion exchanger. A solution of chromate or chromic acid having a concentration up to 60 kg Cr/m/sup 3/ is obtained.
- Research Organization:
- Department of Environmental Chemistry and Technology, Technical University of Lublin (Politechnika Lubelska), Lublin
- OSTI ID:
- 6326017
- Report Number(s):
- CONF-8303191-
- Conference Information:
- Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Journal Volume: STP-851
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
510200 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ANIONS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
CHROMIUM
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
DEMETALLIZATION
DISSOLUTION
ELEMENTS
INDUSTRIAL WASTES
ION EXCHANGE
IONS
LEACHING
MANAGEMENT
MATERIALS RECOVERY
METALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
RECYCLING
ROASTING
SEPARATION PROCESSES
SLUDGES
SODIUM CARBONATES
SODIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER TREATMENT
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
510200 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ANIONS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
CHROMIUM
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
DEMETALLIZATION
DISSOLUTION
ELEMENTS
INDUSTRIAL WASTES
ION EXCHANGE
IONS
LEACHING
MANAGEMENT
MATERIALS RECOVERY
METALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
RECYCLING
ROASTING
SEPARATION PROCESSES
SLUDGES
SODIUM CARBONATES
SODIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER TREATMENT