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Removal and recovery of cyanide and zinc from electroplating wastes by solvent extraction

Journal Article · · Plat. Surf. Finish.; (United States)
OSTI ID:7311309
;
Quaternary amines are unique in their ability to chemically extract cyanides from highly alkaline solutions. Both zinc cyanide and free cyanide extract essentially quantitatively at the subnanogram and macro levels. Regeneration of the amine solvent for recycle is achieved by stripping it with dilute sodium hydroxide. A laboratory-scale continuous mixer-settler has been designed and fabricated for evaluating the feasibility of the simple solvent extraction process for treating actual cyanide wastes from the electroplating industry. Free cyanide and zinc cyanide have been successfully removed, concentrated, and recovered in a series of demonstration runs. In addition to its pollution abatement benefits, the new process shows considerable promise for the metal-finishing industry, because of the potential savings which accrue through the recovered water, metals, and cyanide.
Research Organization:
Oak Ridge National Lab., TN
DOE Contract Number:
W-7405-ENG-26
OSTI ID:
7311309
Journal Information:
Plat. Surf. Finish.; (United States), Journal Name: Plat. Surf. Finish.; (United States); ISSN PSFMD
Country of Publication:
United States
Language:
English

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320302 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Materials
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AMINES
AMMONIUM COMPOUNDS
CYANIDES
DEPOSITION
ELECTRODEPOSITION
ELECTROLYSIS
ELECTROPLATING
EXTRACTION
LIQUID WASTES
LYSIS
ORGANIC COMPOUNDS
PLATING
POLLUTION
QUATERNARY COMPOUNDS
RECOVERY
SEPARATION PROCESSES
SOLVENT EXTRACTION
SURFACE COATING
WASTES
WATER POLLUTION
ZINC COMPOUNDS