The characterization of cyanide in the dinitrotoluene and wastewater treatment process

摘要

Trace levels of cyanide were found in the effluent wastewater resulting from the production of dinitrotoluene. To determine the source of cyanide, a survey of the system was conducted. The wastewater treatment plant was also surveyed before and during dinitrotoluene production.Iso-octane extraction, exposure to ultraviolet light, and metal sequestering agents were used in attempts to perform these analyses. These methods did not give consistent results; therefore, the conventional distillation method followed by colorimetric or selective ion electrode determination was used.