Oxidative treatment of cyanide in wastewater using hydrogen peroxide and homogeneous catalyst.
Batch kinetic tests were conducted to determine the effects of experimental conditions and catalysts on cyanide degradation. Cyanide degradation by hydrogen peroxide was found to follow first-order kinetics. Reaction rates increased with increasing pH and decreasing temperature. The activation energy for cyanide degradation by hydrogen peroxide was found to be -13.81 kJ/mol. The addition of Cu2+ or Cd2+ as catalysts resulted in increasing reaction rates. In alkaline conditions, the catalytic effects of Cu2+ or Cd2+ were accelerated and Cu2+ was found to be a more effective catalyst than Cd2+. The practical relevance of the laboratory oxidation method of cyanide was demonstrated for actual industrial wastewater.
Lee
Tae-Yoon
TY
Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Korea.
Kwon
Young-Shik
YS
Kim
Dong-Su
DS
D002384:Catalysis; D003486:Cyanides / Q000737:chemistry*; D006801:Humans; D006861:Hydrogen Peroxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical
D003486:Cyanides; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide