响应曲面法优化含铜废水中铜离子的吸附去除特性

Optimizing the Characteristics of Removing Copper Ion in Wastewater Containing Copper Using Response Surface Method

以模拟含铜废水为研究对象,利用响应曲面法对D401螯合树脂去除废水中铜的操作条件进行优化。优化了单因素的影响,并在此基础上选取pH值、温度、Cu^(2+)的初始质量浓度作为自变量,以吸附量为响应值,根据Box-Behnken实验设计原理,采用三因素三水平响应曲面设计对吸附量进行回归分析,模拟得到二次多项式回归方程的预测模型。根据响应曲面图优化结果和实际操作条件,确定最佳条件为:pH值4.35,温度40.00℃,Cu^(2+)的初始质量浓度620mg/L,最大吸附量83.34mg/g,与模型理论预测值82.64mg/g基本吻合。结果表明,模拟得到的预测模型可靠,响应曲面法可以用于含铜废水中铜的去除特性的优化。

The optimal conditions for D401 chelating resin removing copper ion in simulated wastewater containing copper was investigated by using response surface method（RSM）.On the basis of single factor experiments,the main factors containing pH value,temperature and initial copper ion mass concentration were chosen as the independent variable and the adsorbing capacity was chosen as the response value.Then,based on Box-Behnken experiment design principle,the adsorption capacity was analyzed with three factors and three levels response surface design,and the prediction model of quadratic polynomial regression equation was also established.According to the response surface optimization results and the actual operating conditions,the optimal conditions were determined as follows：pH value 4.35,temperature 40.00 ℃,initial copper ion mass concentration 620 mg/L,and the maximum absorption capacity was 83.34 mg/g,close to the theoretical predictive value of 82.64 mg/g.Results showed that the prediction model was reliable,RSM can be used for optimizing the characteristics of removing copper ion in wastewater containing copper.