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Development and commercialization of the waste-plus-waste process for recovering metals from cyanide and other wastes.
George-LC; Hjersted-LN; Cochran-AA; Allan-DR
AIChE Symp Series Intermat Comp Shrinking Resources, 1977 Oct; 73(170):78-79
The waste-plus-waste (wpw) process developed by the Bureau of Mines combines various acid and alkaline cyanide wastes under controlled conditions to neutralize the wastes and almost completely precipitate the metals and cyanides. The process was successfully used to treat some major types of electroplating and etching wastes, containing cd, cr, cu, ni, and zn, and to treat both concentrated and dilute wastes. The economics for treating concentrated wastes are especially attractive because of the low cost of mixing two wastes, the high value of the recovered metals, and the simplicity of the recovery procedures. Operating experience and a general cost comparison are presented.
Mining; Waste treatment; Acids; Alkalines; Cyanides; Metals; Electroplating; Hazardous waste; Costs; Economics; Cadmium; Chromium; Copper; Nickel; Zinc
7440-43-9; 7440-47-3; 7440-50-8; 7440-02-0; 7440-66-6
Issue of Publication
AIChE Symp. Series, Intermat. Comp. . . . Shrinking Resources, 10/77
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division