响应面法优化UV/H<sub>2</sub>O<sub>2</sub>光氧化法处理高浓度LAS废水
河南省冶金研究所有限责任公司 河南省科学院质量检验与分析测试研究中心
2014-04-05
LAS废水 UV/H2O2 响应面法
采用响应面法对UV/H2O2光氧化法处理高浓度LAS废水的工艺参数进行了系统研究.根据Box-Behnken Design(BBD)设计原理,以初始pH与H2O2投加量、反应时间和温度为主要影响因素,设计4因素3水平共29个实验点的实验方案,并建立了二次响应面拟合模型.方差分析表明,初始pH与H2O2投加量、反应时间和温度以及初始pH和H2O2投加量、H2O2投加量和温度之间的交互作用,对实验结果具有显著性影响.实验得到的光氧化高浓度LAS废水最佳工艺条件,pH为4.0,H2O2投加量为40 mmol/L,反应时间为90 min,温度为25℃,在此条件下,LAS的平均去除率为98.1%.%Response surface methodology( RSM) was utilized to facilitate a more systematic understanding of the processing parameters of UV / H2O2photo oxidation process to treat the high concentration LAS wastewater. The four factors in this study using the Box-Behnken Design( BBD) design principles included initial pH,H2O2 dosage,reaction time and temperature,and a total of 29 experimental points of the four-factor,three-level experimental program was designed. A response surface quadratic model in terms of actual factors was obtained based on the experimental data. Analysis of variance( ANOVA) showed that initial pH,H2O2dosage,reaction time and temperature,the interactive effect between the initial pH and H2O2dosage as well as H2O2dosage and temperature were demonstrated statistically significant in the LAS removal efficiency. The optimum conditions of photo-oxidation were determined to be initial pH 4. 0,H2O2of 40 mmol / L,reaction time of 90 min and reaction temperature of 25℃. The removal efficiency of LAS was up to 98. 1% under the optimal conditions.
