Emulsion Liquid Membrane Stability And Separation Of Copper Ions,

In this paper, research is focused on the two aspects, the study on the stability of W/O/W type multiple emulsion, namely emulsion liquid membrane, and the study on the separation of copper(II) in model industry waste water by emulsion liquid membrane.The study of stability of W/O/W type multiple emulsion includes the two aspects. First, orthognal experiment method is employed to investigate some parameters, such as the concentration of surfactant, the ratio between the volume of oil phase and the volume of water phase, the concentration of acid in the internal phase and the rate of which is applied to create emulsion. The more important parameters for the stability of multiple emulsion are shown. Secondly, four different solvents are applied to form emulsion by which to research how different solvents oil phase influence the stability of emulsion liquid membrane. Views are paid attention to the difference and common among primary emulsion , multiple emulsion(ELM) and recover emulsion made by those four oil phase. The results are shown that primary emulsion with good stability can not promise good stability of multiple emulsion generally. Meanwhile, the change in viscosity of simple emulsion with time reveals the change of viscosity with the volume faction. Since viscosity of emulsion is important to ELM separation process, it is necessary to research the viscosity of emulsion.During the study of separation of copper in the model industry waste by emulsion liquid membrane, some operating parameters are investigated, including the value of PH in the external phase, the concentration of acid in the internal phase, the concentration of copper in external phase, the concentration of surfactant, the kinds of carriers in the membranes phase as well as the concentration of carriers.