Chemistry and Chemical Engineering Research Center of Iran, Tehran, PO Box 14335-186, Iran.
J Hazard Mater. 2010 May 15;177(1-3):660-7. doi: 10.1016/j.jhazmat.2009.12.082. Epub 2009 Dec 24.
Removal of cadmium as a hazardous heavy metal is studied by applying a new design of hybrid cell for liquid membrane process. Tri-iso-octyl amine (TIOA) is used as the carrier in the organic phase. The concentration of cadmium in the samples is measured by atomic absorption spectroscopy. The effect of various parameters including type of supporting membrane, pH of feed and stripping phases, initial concentration of cadmium, carrier concentration, solvent nature, and also organic film resistance on mass transfer rate and removal efficiency are studied. The effect of temperature on mass transfer flux is studied by proposing a prediction model. The optimum carrier concentration is found to be about 0.05 M. The appropriate values of pH for feed and stripping phases are about 3 and 13, respectively.
采用新型混合液膜体系对溶液中的镉（作为一种危险的重金属）进行去除研究。采用三异辛胺（TIOA）作为有机相中的载体。通过原子吸收光谱法测量样品中镉的浓度。考察了各种参数对传质速率和去除效率的影响，包括支撑膜的类型、进料和汽提相的 pH 值、镉的初始浓度、载体浓度、溶剂性质以及有机膜阻力。通过提出预测模型研究了温度对传质通量的影响。发现最佳载体浓度约为 0.05 M，进料相和汽提相的适宜 pH 值分别约为 3 和 13。
