催化湿式氧化法处理高浓度含氰废水

The application of the CWAO in treating high concentration cyanide-contained waste water

以硝酸铜和柠檬酸为原料,采用柠檬酸溶胶-凝胶法制备CuO,利用XRD对CuO粉体进行表征,以CuO为催化剂催化湿式氧化处理高浓度含氰废水。考察了搅拌速度、反应温度、氧气分压、催化剂投加量、pH以及反应时间等因素对处理效果的影响。实验结果表明,催化剂投加量0.5g/L、CN-初始质量浓度2 000mg/L、反应温度130℃以及氧气分压0.6MPa、搅拌速度600r/min、pH为8、反应60min时,CN-去除率可达到80%。

The CuO was prepared and characterized by XRD.The results indicated that CuO can be used as efficient catalyst to remove CN-from the sewage.The removal rate of CN-from the sewage is 80% when the concentration of CN-in the sewage is 2 000 mg/L,the amount of CuO is 0.5 g/L,the pH in the sewage is 8,the reaction temperature is 130 ℃,the oxygen partial pressure of 0.6 MPa,stirring speed is 600 r/min and the reaction time is 60 min.