Purification-Concentration Process of Zn(II), Ni(II) and Cd(II) Using Liquid Membrane with Different Carriers

Heavy metals are toxic to human beings and organisms. Industrial effluents drawn from different industries such as dyeing, mining, electroplating, nuclear power operations, aerospace and battery manufacturing processes are highly contaminated with heavy metals and create a major environmental problem to their discharge into land. Liquid membrane is considered as a low-cost method for treating wastes. Purification-concentration process using liquid membrane containing different extractants as carriers considered to be the most effective technique for the removal of heavy metals from wastewaters. This study primarily focuses on the extraction–reextraction in order to design a purification-contraction process using liquid membrane to remove different heavy metals (Zn, Ni, and Cd) and metal ions from aqueous solutions for industrial application. In order to design and optimize a transport process for industrial application, the effect of transport conditions has been studied. Moreover, it is important to study the influence of different parameters such as: the acidity, nature and concentration of the carriers, the time of transportation.