二氧化氯处理含铁氰化物废水的研究

Study on the treatment of iron cyanide wastewater by chlorine dioxide

在有助剂焦磷酸钠存在时进行了用二氧化氯处理含铁氰化物废水的研究。实验结果表明 ,在废水pH值为5— 9,焦磷酸钠∶铁氰化物 (摩尔比 ) =1.2∶1,处理时间为 6 0min ,二氧化氯加入量大于理论量 2 0 %的工艺条件下 ,处理后水中总氰化物含量在 0 .5mg/L以下。

The treatment of iron cyanide wastewater by applying chlorine dioxide with the existence of sodium pyrophosphate was studied. The experimental results demonstrated that with the pH of the wastewater at 5—9, the ration of sodium pyrophosphate : iron cyanide was controlled at 1.2∶1,the treatment time was 60 min and the addition of chlorine dioxide was above 1.2 times of the theoretical addition, the treatment result of total cyanide can be controlled under 0.5 mg/L.