摘要
采用浸渍法制备负载双金属(铁和铈)活性炭(Fe-Ce/AC),以Fe-Ce/AC为非均相Fenton催化剂处理兰炭废水。在单因素实验基础下,以pH值及H_2O_2和Fe-Ce/AC投加量为考察因素,兰炭废水COD去除率为评价指标,确定H_2O_2最佳投加量为3 m L,Fe-Ce/AC最佳投加量为0.10 g,pH最佳值为4。采用中心组合设计-响应曲面法优化Fe-Ce/AC非均相Fenton技术处理兰炭废水工艺,结果表明,各影响因子显著性顺序为:pH>Fe-Ce/AC投加量>H_2O_2投加量,其中,H_2O_2投加量与Fe-Ce/AC投加量间交互作用显著,模型校正决定系数R2adj=为0.920 9,模型回归项极显著(P<0.000 1),表明模型可信度和准确度高;最佳工艺条件为:pH=3.7,H_2O_2投加量为2.7 m L,Fe-Ce/AC投加量为0.1 g,COD去除率模型预测值为81.31%,与实验值80.05%相比,相对误差为1.55%,表明模型对实验结果有良好的预测性。
Fe-Ce/AC was prepared by impregnation method and used as heterogeneous Fenton catalyst in treating semi-coking wastewater. Basing on the single factor test,the optimal conditions were determined as 3 m L of H2O2,0. 10 g of Fe-Ce/AC,4 of pH,when selecting pH value,H2O2 amount,Fe-Ce/AC amount as investigation factors and COD removal efficiency as evaluation indicator. When central composite design（ CCD） was used to optimize the heterogeneous Fenton process in treating semi-coking wastewater using Fe-Ce/AC as catalyst,the results showed that the significance of the three factors on COD removal rate followed as： pH 〉 dose of Fe-Ce/AC 〉 dose of H2O2. The most significant interaction occurred between dose of Fe-Ce/AC and dose of H2O2. The calibrate determination coefficient（ R2 adj） was 0. 920 9 and the regression of this model（ P 〈 0. 000 1） was significant,which demonstrated the model was reliableand of high precision. The optimum conditions were determined to be： H2O2 dosage 2. 90 m L,Fe-Ce/AC dosage 0. 10 g and pH 3. 67. The predicted maximum COD removal rate was 81. 31%,while the verification test was 80. 05%,with a deviation of 1. 55%,indicating that the model had good predictability on the experimental results.
作者
高雯雯
张智芳
马向荣
李建法
纪鑫鑫
Gao Wenwen;Zhang Zhifang;Ma Xiangrong;Li Jianfa;Ji Xinxin(School of Chemiswy and Chemical Engineering, Yulin University, Yulin 719000, Shaanxi, China;Shaanxi Key Laboratocy of Low Metamorphic Coal Clean Utilization,Yulin 719000, Shaanxi, China;Yulin Vocational and Technical College,Yulin 719000, Shaanxi, China)
出处
《工业催化》
CAS
2018年第3期73-79,共7页
Industrial Catalysis
基金
国家自然科学基金(21763030)
陕西省科技厅项目(2015GY113)
陕西省低变质煤洁净利用重点实验室开放基金项目(2014SKL-DBM013)
