CuO/CSAC催化剂的制备及酸性大红GR废水的处理

Preparation of CuO/CSAC catalyst and treatment of acid brilliant scarlet GR wastewater

以椰壳活性炭(CSAC)为载体负载CuO制备了CuO/CSAC催化剂。采用正交实验优化了CuO/CSAC催化剂的制备工艺条件,采用单因素实验和响应面实验优化了CuO/CSAC催化剂处理模拟酸性大红GR废水的工艺参数。结果表明:在CSAC加入量5 g、煅烧时间2.5 h、煅烧温度300℃、0.5 mol/L的硝酸铜溶液用量15 mL的最佳工艺条件下,CuO/CSAC催化剂微孔结构丰富,CuO特征峰明显;CuO/CSAC催化剂处理酸性大红GR废水的最佳工艺参数为pH 5.0,曝气时间4.10 h,催化剂加入量0.57 g,可将100 mL初始COD 962 mg/L、初始色度32700倍的废水分别处理至残余COD 41.5 mg/L,残余色度28.4倍。建立了以残余COD和残余色度为响应值的工艺模型,计算值与实验值的相对误差均在±10%以内。

CuO/CSAC catalyst was prepared by carrying CuO on coconut shell activated carbon(CSAC).The preparation process conditions were optimized by orthogonal experiments.The simulated acidic bright scarlet red GR wastewater was treated by the CuO/CSAC catalyst and the process parameters were optimized by single-factor experiments and response surface experiments.The experimental results show that:Under the optimum preparation conditions of CSAC amount 5 g,calcination time 2.5 h,calcination temperature 300℃and copper nitrate solution(0.5 mol/L)dosage 15 mL,the CuO/CSAC catalyst has rich microporous structure and obvious CuO characteristic peaks;Under the optimum process parameters for treatment of acidic bright scarlet red GR wastewater by the CuO/CSAC catalyst were pH 5.0,aeration time 4.10 h and catalyst amount 0.57 g,the wastewater with 962 mg/L of initial COD and 32700 times of initial chroma can be treated to COD 41.5 mg/L and residual chroma 28.4 times,respectively.The process models are established with residual COD and residual chroma as responses values,and the relative errors between the calculated value values and the experimental values are within±10%.