Emulsion Liquid Membrane and APT Production

The concept of emulsion liquid membrane is proposed by N.N.Li in 1968, and it has attracted researchers from many countries for APT production. Because it simulates the activity of migration of biofilms on the migration mechanism, it enables materials highly enriched against the concentration difference. It is the combination of extraction and back-extraction process carried out in a system at the same time, the reaction takes place on the surface area of the extremely thin film interface, and there is carrier on the membrane, so its kinetic advantages are much more than the reaction takes places in solution, also the mass transfer rate, efficiency and selectivity than the extraction process.

Currently the main technology key of emulsion liquid membrane is the stability and membrane rupture technology. The requirements are different for the stability of the film in the film extraction and rupture stage, the former one requires high film stability while the latter one requires low stability. Currently it’s difficult to control the film stability and longevity. Membrane rupture technology is related to reuse and recycling of organic phase, which directly affect the economic effects of liquid film method, and different formulations of liquid membrane result in different effects of rupture, therefore the rupture technology also needs to be tested. For the study of surfactant and carriers, it’s also directly affect the technical and economic effects of liquid film. In addition, in the industrial wastewater treatment, since the dissolution of membrane components may cause secondary pollution, these problems can be solved in the research and development of the film.