响应面优化CCl_4增强超声降解左旋氧氟沙星模拟废水

Degradation of levofloxacin by ultrasound /CCl_4:optimization by response surface methodology

利用响应面优化实验设计方法对CCl4增强超声降解左旋氧氟沙星模拟废水的影响因素进行探讨和分析,考察了溶液初始pH值、超声功率、左旋氧氟沙星初始浓度的影响。应用Box-Behnken中心组合设计得到一个二次多项式数学模型,确定了US/CCl4降解左旋氧氟沙星的优化条件:初始pH值6.8,超声功率189 W,左旋氧氟沙星初始浓度为5 mg/L时,左旋氧氟沙星的去除率达到最大(82.99%)。经实验验证,实际值与模型预测值吻合性良好,偏差仅为0.036%。

Response surface methodology was employed to investigate the effects of initial pH value, ultra- sonic power and levofloxacin initial concentration on levofloxacin degradation by US/GEl4 system. By the Box- Behnken centre-united experiment design, a predictive polynomial quadratic model was set up and the optimum extraction conditions were developed. The optimum initial pH,ultrasonic power, and levofloxacin initial concen- tration were 6.8, 189 W, and 5 mg/L, respectively. And maximum degradation efficiency of 82.99% was a- chieved under the optimal conditions. The experimental results were in good agreement with the predicted values of the model equation, with only 0. 036% deviation.