Emulsion pertraction technology

Bringas, E., San Roman, M.F. and Ortiz, I. (2006) Separation and recovery of anionic pollutants by the emulsion pertraction technology. Remediation of polluted... 

More recently HF modules have been used in a different configuration that based on similar fundamentals tries to minimize the required membrane area, that is, emulsion pertraction technology. In this case, the organic and back-extraction phases are emulsified before the entrance to the HF module and they can be separated at the module outlet. Although there are only a few references to this alternative, its viability to the recovery of Cr(Vl) and Cu from polluted waters [44 6] as well as to the removal of hydrocarbons [47] has been shown, but much effort is needed on the modeling of this technology before additional successful applications can be developed. 

As mentioned in the introduction section, an emerging alternative to achieve the separation of metallic pollutants from aqueous effluents and their concentration in a receiving phase is the emulsion pertraction technology using HF modules. 

Promising results are shown by recently developed integrated SLM-ELM [84, 85] systems. These techniques are known as supported liquid membrane with strip dispersion (SLMSD), pseudo-emulsion-based hollow fiber strip dispersion (PEHFSD), emulsion pertraction technology (EPP), and strip dispersion hybrid Hquid membrane (SDHLM). AH techniques are the same the organic phase (carrier, dissolved in diluent) and back extraction aqueous phase are emulsified before injection into the module and can be separated at the module outlet. The difference is only in the type of the SLM contactors hoUow fiber or flat sheet and in the Hquid membrane (carrier) composition. These techniques have been successfuUy demonstrated for the removal and recovery of metals from wastewaters. Nevertheless, the techniques stiU need to be tested in specific apphcations to evaluate the suitabUity of the technology for commercial use. 

Alguadl, F. J., Alonso, M., Lopez, F. A. Lopez-Delgado, A. (2010). Pseudo-emulsion membrane strip dispersion (PEMSD) pertraction of chromium(Vl) using Cyphos IL 101 ionic liquid as carrier. Environmental Science and Technology, in press, DOl 10.1021/esl01302b... 

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