Plating Waste Sludge Metal Recovery.

摘要: Abstract : The U.S. Army Toxic and Hazardous Materials Agency has requested that AMAX Extractive Research & Development, Inc. conduct a five-phase program to review literature on the current state-of-the-art in metal recovery from plating wastes, propose typical sludge composition aging treatment lieu of actual wastes), develop research design test plan for treating this sludge, program, summarize results final report. report proposes sulfuric acid leach hydroxide sludges, containing copper, cadmium, zinc, nickel, iron, chromium, extract greater than 99 percent heavy values, followed by lime resulting filter cake render it nonhazardous EP testing. may be treated selective sulfide precipitation at controlled pH regime order produce mixed copper cadmium with most zinc present original separate liquor more 98 which does not form precipitate, Nickel iron are selectively separated under conditions. However, solvent extraction process using di(2-ethyl-hexyl) phosphoric can used recovering chromium filtrate. Originator-supplied keywords: Plating Acid leach, toxicity, Metals, Separation, Extraction, Recovery.