Cyanide Waste Treatment Utilizing Catalytic Oxidation.

摘要

Electroplating operations and color photograph processing are two major sources of liquid cyanide wastes. To meet state effluent standards, a system using a proprietary cobalt-based catalyst and chlorine-producing electrolytic cells was evaluated with actual photographic and electroplating waste. A literature search and laboratory evaluation was conducted to determine processes that could be used to supplement the catalytic oxidation system. A prototype catalytic oxidation system capable of treating 1/4gallon per minute (gpm) of 2,000mg/1total cyanide waste produced effluent streams containing undetectable amounts of cyanide (under 0.01mg/1) with copper plating and nickel strip feeds. Treatment of photographic wastes produced an 87to 94percent reduction of total cyanide. The catalytic oxidation system has a strong potential for decreasing the operation costs of cyanide destruction systems. System designs are given for two full-size cyanide waste treatment systems. (Modified author abstract)