响应曲面法优化支撑液膜中Cu(Ⅱ)的传输  

Optimization of Cu(Ⅱ)transfer process in supported liquid membrane by response surface methodology

作　　者：余晓皎[1] 张帆[1] 彭玉洁[2] 张健[1] 代文琴 钮金芬[1] 姚秉华[1] 

机构地区：[1]西安理工大学理学院,陕西西安710048 [2]平顶山学院化学化工学院,河南平顶山467000

出　　处：《西安理工大学学报》2015年第1期45-49,90,共6页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(21276208);陕西省科技计划资助项目(2012K07-11);西安市科技计划资助项目(CX12544);陕西省教育厅自然科学基金资助项目(14JK1531)

摘　　要：以2-乙基己基膦酸单2-乙基己基酯为载体,煤油为膜溶剂,聚偏氟乙烯膜为支撑体,构建了支撑液膜体系。采用响应曲面优化法对影响Cu(II)传输的主要因素进行了优化并建立了二次多项式数学模型。同时研究了Cu(II)在该体系中的传输过程,建立了Cu(II)在支撑液膜体系中传输的渗透系数方程。结果表明,建立的二次模型的R2为0.999 6,拟合度良好,具有高度显著性。获得Cu(II)在支撑液膜体系中最佳传输条件为:Cu(II)起始浓度为4.0×10-4 mol/L,迁移时间为120min,载体浓度为7.0%,料液相pH为5.0,在此条件下,Cu(II)的迁移率可达到84.9%,与预测值的相对误差为0.35%。Supported liquid membrane system is prepared using 2-Ethylhexylphosphoric acid mono-2-ethylhexyl ester as carrier,kerosene as the membrane solvent and polyvinylidene fluoride as supported matrix.Response surface methodology based on the Box-Behnken design（BBD）is employed to investigate the effects of various factors on migration rate of Cu（II）,and the quadratic polynomial mathematic model is built.The transfer process of Cu（II）is investigated,and the transfer coefficient equation is established.The results show that R2 in the established quadratic model is 0.999 6,with better fitness and higher significance.The optimal experimental condition can be obtained as follows：Cu（II）concentration is 4.0×10-4 mol/L,migration time is120 min,carrier concentration is 7.0% and feed solution pH is 5.0.Under the optimal conditions,the migration rate of Cu（II）can reach 84.9%.The predicted value of migration rate is very satisfied with data of experimentation,the relative error is found only to be 0.35%.

关 键 词：支撑液膜 响应曲面优化法 CU(II) 传输 

分 类 号：TQ028.8[化学工程]