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Printed circuit boards waste

Treatment methodologies for process solution wastes include pH adjustment, flocculation, precipitation of metals, dewatering and sludge drying. Chelated metals require special treatment to break the complexes. Chromium, cyanide, electroless plating, and printed circuit board wastes often need to be segregated from other streams in order to reduce waste volumes and avoid the chance that some complexed metals may escape the treatment system. [Pg.5]

MECER A process for recovering copper from waste streams by extraction with a (s-diketone solution. Used in Germany, Sweden, the United Kingdom, and the USSR for treating effluent from the etching of printed circuit boards. [Pg.173]

Cal-Tech Management Associates, SCADA Systems, Inc., and Davis, G. A., Piasecki, B., and Mueller, M. J. October 1987. Waste Reduction Strategies for the Printed Circuit Board Industry. California Department of Health Services, Alternative Technology Section, Toxic Substances Control Division. Contract No. 85-00173. [Pg.73]

WASTE MANAGEMENT FOR PRINTED CIRCUIT BOARD MANUFACTURE... [Pg.119]

USEPA. 1989. Guide to Waste Minimization in the Printed Circuit Board Industry. Prepared by Jacobs Engineering Group, Inc., Pasadena, CA for the U.S. Environmental Protection Agency (In Process). [Pg.120]

Sellers, Veronica R. 19B6. "Waste Management Alternatives for Electroplating and Printed Circuit Board Manufacturing Operations." 4th Massachusetts Hazardous Waste Source Reduction Conference Proceedings. Massachusetts Department of Environmental Management, Boston, Massachusetts. [Pg.216]

Initially, a crystallizer system was installed to recover copper sulfate and recycle the plating rack stripping chemistry for reuse in the printed circuit board plating area. The copper sulfate was then sold to a local copper foil manufacturer as a feedstock material to their process. Through this process, waste sludge was converted to a saleable product and exempted from regulation as a hazardous waste. [Pg.277]

Waste from electrical and electronic equipment arises at the sorting plant, where the frame, the printed circuit board PCB, the cathode ray tube, etc. are separated for recycling. The remaining plastics fraction is in part flame-retarded, hence contains brominated and antimony compounds. The number of WEEE recycling plants is growing, so that the logistics are no longer a major problem. [Pg.28]

Electrical and electronic devices are made utilizing several various types of plastic materials, thus when discarded their waste is difficult to recycle. The plastics employed in housing and other appliances are more or less homogeneous materials (among others PP, PVC, PS, HIPS, ABS, SAN, Nylon 6,6, the pyrolysis liquids of which have been discussed above). However, metals are embedded in printed circuit boards, switches, junctions and insulated wires, moreover these parts contain fire retardants in addition to support and filler materials. Pyrolysis is a suitable way to remove plastics smoothly from embedded metals in electrical and electronic waste (EEW), in addition the thermal decomposition products of the plastics may serve as feedstock or fuel. PVC, PBT, Nylon 6,6, polycarbonate (PC), polyphenylene ether (PPO), epoxy and phenolic resins occur in these metal-containing parts of EEW. [Pg.337]

Toxic Waste Minimization in the Printed Circuit Board Industry... [Pg.62]

Guidelines for Waste Reduction and Recycling Metal Finishing, Electroplating, Printed Circuit Board Manufacturing... [Pg.64]

Removal of Heavy Metals. Federal, state and local regulations place strict limits on the quantities of heavy metals which may be released to the environment. The controlled metals include Ag, As, Cd, Cr, Cu, Pb, Hg, Ni, Sb and Zn. U.S. electroplaters, metal finishers, and printed-circuit-board manufacturers are under mounting pressure to clean up their waste waters. [Pg.124]

These anodes are used extensively in electrogalvanizing, tin electroplating, electrochemical production of copper foil for printed circuit boards, and electrowinning of copper and zinc [91-95]. The application of oxide-coated anodes to sodium sulfate electrolysis so far is small and is not a major driver of electrode development programs. However, environmental concerns associated with byproduct or waste sodium sulfate, along with possible imbalances in the demand for chlorine and caustic soda are enough to maintain interest in the technique. [Pg.1393]

SCADA Systems Inc. Cal-Tech Management Associates Waste Reduction Strategies for the Printed Circuit Board Industry. California Department of Health Services Contract 85-00173, Sacramento, CA., 1987. [Pg.577]

See other pages where Printed circuit boards waste is mentioned: [Pg.33]    [Pg.53]    [Pg.369]    [Pg.382]    [Pg.308]    [Pg.316]    [Pg.11]    [Pg.3]    [Pg.66]    [Pg.188]    [Pg.245]    [Pg.256]    [Pg.277]    [Pg.277]    [Pg.309]    [Pg.421]    [Pg.163]    [Pg.398]    [Pg.227]    [Pg.145]    [Pg.864]    [Pg.279]    [Pg.296]    [Pg.530]    [Pg.595]    [Pg.147]    [Pg.344]    [Pg.689]    [Pg.173]    [Pg.892]    [Pg.2775]    [Pg.571]    [Pg.33]   


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Printed circuit boards

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