Faculty of Chemical Engineering, Universiti Teknologi MARA (UiTM) Malaysia, 13500 Permatang Pauh, Penang, Malaysia.
J Hazard Mater. 2011 Jun 15;190(1-3):197-204. doi: 10.1016/j.jhazmat.2011.03.025. Epub 2011 Mar 15.
The objectives of this work were to select suitable design parameters and optimize the operating parameters of a soybean oil-based bulk liquid membrane (BLM) for Cu(II) removal and recovery from aqueous solutions. The soybean oil-based BLM consists of an aqueous feed phase (Cu(II) source), an organic membrane phase (soybean oil (diluent), di-2-ethylhexylphosphoric acid (D2EHPA) (carrier) and tributylphosphate (phase modifier)) and an aqueous stripping phase (sulfuric acid solution (H(2)SO(4))). Effects of design parameters (stirring condition and stripping/membrane to feed/membrane interface area ratio) of soybean oil-based BLM on the Cu(II) removal and recovery from aqueous solutions were investigated and the suitable parameters were selected for further studies. Optimization of the operating parameters (D2EHPA concentration, H(2)SO(4) concentration, stirring speed, temperature and operating time) of soybean oil-based BLM for maximum percentage (%) recovery of Cu(II) was then conducted using Response Surface Methodology and the optimum parameters were determined. A regression model for % recovery was developed and its adequacy was evaluated. The experimental % recovery obtained under the optimum operating conditions was compared with the predicted one and they were found to agree satisfactorily with each other.
本工作旨在选择合适的设计参数，并优化从水溶液中去除和回收 Cu(II)的大豆油基体相膜（BLM）的操作参数。大豆油基 BLM 由水相进料（Cu(II)源）、有机膜相（大豆油（稀释剂）、二（2-乙基己基）磷酸（D2EHPA）（载体）和磷酸三丁酯（相改性剂））和水相（硫酸溶液（H(2)SO(4))）组成。考察了大豆油基 BLM 的设计参数（搅拌条件和萃取/膜与进料/膜界面面积比）对从水溶液中去除和回收 Cu(II)的影响，选择了合适的参数进行进一步研究。然后使用响应面法优化了大豆油基 BLM 的操作参数（D2EHPA 浓度、H(2)SO(4)浓度、搅拌速度、温度和操作时间），以实现 Cu(II)的最大回收率（%），并确定了最佳参数。建立了回收率的回归模型，并对其充分性进行了评估。最佳操作条件下的实验回收率与预测值进行了比较，发现它们彼此之间非常吻合。
