Accession Number : AD0885794

Title :   Disposal of Electroplating Wastes by Precipitation and Recovery.

Descriptive Note : Technical rept. 15 Jun 70-15 Jan 71,

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE ERIC H WANG CIVIL ENGINEERING RESEARCH FACILITY

Personal Author(s) : Lehmann,Richard B. ; Patterson,Calvin

Report Date : JUN 1971

Pagination or Media Count : 45

Abstract : The report discusses a comprehensive project undertaken to survey and to select the most effective method of treating highly toxic electroplating and stripping wastes generated at Air Force bases. This particular part of the project concerns itself with treatment of the wastes by acidification and precipitation. Included are studies to optimize the treatment method with respect to the type of acid, pH, quantity and form of ion addition, and precipitation coagulation and filtration. Studies were also made of the evolution of hydrogen cyanide during treatment and the form of the sludge and other solids from the waste. Acidification and precipitation is a satisfactory primary treatment method since it removes 90 percent or more of the toxic components, cyanide, and heavy metals in a relatively short time. However, secondary treatment is necessary prior to environmental disposal of the waste. A procedure for treatment is outlined and further work is proposed. (Author)

Descriptors :   (*WASTES(INDUSTRIAL), ELECTROPLATING), (*ELECTROPLATING, *WATER POLLUTION), (*METALS, WASTES(INDUSTRIAL)), CHEMICAL PRECIPITATION, CYANIDES, CLEANING COMPOUNDS, PH FACTOR, FLUID FILTERS, COMPLEX COMPOUNDS, NICKEL, ZINC, IRON, COPPER, X RAY DIFFRACTION, SULFONATES, CARBON, ADSORPTION, CADMIUM

Subject Categories : Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE