摘要
以废弃向日葵秸秆为原料,采用机械混合法制备了多元稀土/生物质炭复合催化剂,用空气作为氧化剂催化氧化处理模拟印染废水亚甲基蓝.在单因素实验的基础上,采用Box-Beknhen实验设计,以亚甲基蓝脱色率和COD去除率为响应值,对影响催化氧化法最重要的4个因素,即催化剂投加浓度、曝气量、温度及pH进行优化.通过对二次多项式方程求解得知:复合催化剂的投加浓度为8.67g/L、曝气量2.5L/min、温度21℃、pH值为12时,亚甲基蓝脱色率的预测值和实验值分别为100.00%、99.61%;投加浓度7.33g/L、曝气量0.64L/min、温度30℃、pH值为10时,亚甲基蓝COD去除率的预测值和实验值分别为77.65%、75.81%.理论值与实际值非常接近,说明建立的模型合理可行.
Biomass Charcoal loaded multiple rare earth composite material was prepared by mechanical mixing method with sunflower straw as raw material and applied for catalytic oxidation treatment of meth- ylene blue using air as oxidant. Box-Behnken experimental design was employed for design testing program and optimize the four important factors influencing the catalytic oxidation on the basis of single-factor test. The main process parameters considered for optimization were catalyst dosage, aeration rate, temperature and pH,with the decolorization rate and COD removal rate as the response value. The result showed that, maximum predicted and observed decolorization rate were 100.00% and 99.61% on the optimum condition of catalyst dosage 8.67 g/L、aeration rate2.5 L/min.temperature 21℃ .pH value 12,the maximum predicted and observed COD removal rate were 77. 65% and 75.81% on the optimum experimental condition of catalyst dosage 7.33 g/L.aeration rate 0.64 L/min.temperature 30 ℃ .pH value 10,the observed value was well match with the predicted value, this illustrates that the established model is reasonable and feasible.
出处
《内蒙古师范大学学报（自然科学汉文版）》
CAS
北大核心
2017年第1期64-71,80,共9页
Journal of Inner Mongolia Normal University(Natural Science Edition)
基金
内蒙古自然科学基金资助项目(2014MS0221)
关键词
稀土
向日葵秸秆
催化氧化
响应曲面法
亚甲基蓝
生物质炭
rare earth
sunflower straw
catalytic oxidation
response surface methodology
methylene blue
biomass charcoal
