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Leachate characteristics and composition of cyanide-bearing wastes from manufactured gas plants.

Past activities associated with the manufacture of gas from hydrocarbon feedstocks resulted in the generation of substantial quantities of cyanide-bearing wastes produced as a result of product gas cleanup for the removal of hydrogen sulfide and hydrogen cyanide. Large quantities of these sites have been found at several manufactured gas plant sites. It was the purpose of this study to address questions relating to the availability of cyanide to the environment and to determine the chemical forms of cyanide in the waste. This information is necessary in order to assess the toxicity and possible methods of treatment and disposal of the material