About ten million tons of cyanide in the waste water discharged into water bodies every year in our country. It is important to study ozone oxidation degradation of cyanide wastewater because cyanide belongs to toxic substances.The influences of temperature ,ozone dosage and pH value on the degradation of cyanide wastewater were studied. The results showed that the treatment effect of ozone degradation of cyanide wastewater was good; when the reaction temperature was 30 ℃, ozone dosing quantity was 30 mg/min, ozone concentration was 9.4 mg/L, pH = 10, reaction time was 30 min , 150 mg/L cyanide wastewater was treated, the degradation rate reached 99.8 %. The activity was high for ozone degradation of cyanide and the equipments were simple.
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