Get the metal out

Journal Article · Mon Feb 01 04:00:00 EST 1993 · CHEMTECH; (United States)

OSTI ID:6074237

Fries, W ^[1]; Chew, D

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1. Rohm and Haas, Spring House, PA (United States). Research and Development Lab.

Wet processes for producing printed circuit boards lead to large volumes of wastewater containing low, but unacceptable, levels of copper ions. This water is usually treated with conventional precipitation technology, which produces hazardous metal hydroxide sludge and an effluent in the low ppm range. These treatment systems are becoming inadequate for printed wiring board (PWB) manufacturers because of the high operating costs, high cost of sludge disposal, and the worldwide trend toward reducing heavy metal discharge limits. Kinetico Engineered Systems, Inc., has developed a treatment for this waste based on ion exchange resin and electrowinning technologies. The program meets copper discharge limits below 1 ppm, recovers copper in a salable metallic form, and recylces 60 to 80 % of the copper-bearing wastes. The process has led to reduced operating costs while meeting regulatory compliance levels reliably.

• OSTI ID: 6074237
• Journal Information: CHEMTECH; (United States), Journal Name: CHEMTECH; (United States) Vol. 23:2; ISSN CHTEDD; ISSN 0009-2703
• 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
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
COPPER
DEPOSITION
ELECTRODEPOSITION
ELECTROLYSIS
ELECTRONIC CIRCUITS
ELEMENTS
FILTRATION
HYDROGEN COMPOUNDS
ION EXCHANGE
ION EXCHANGE MATERIALS
LIQUID WASTES
LYSIS
MANAGEMENT
MANUFACTURING
MATERIALS
MATERIALS RECOVERY
METALS
OXYGEN COMPOUNDS
PRINTED CIRCUITS
PROCESSING
SEPARATION PROCESSES
SURFACE COATING
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT