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2012 | 21 | 3 |
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Separation of anionic surfactants in a sequential ultrafiltration - ion exchange purification system

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Efficiency of a sequential ultrafiltration - ion exchange purification system was studied by testing separation of an anionic surfactant (SDBS) from aqueous solutions. Commercially available ultrafiltration membranes with cut-off values of 5, 10, and 30 kDa were used for the tests. The ion exchange processes were carried out on five types of ion-exchange resins - both macroporous and gel-based. Overall efficiency of the integrated purification system was determined by numerous parameters, including quality of the solution to be purified, membrane material type, membrane cut-off value, the type of ion-exchange resin, its dose, and solution contact time of the ion-exchange resin. It was shown that the application of ion exchange constitutes a highly effective final purification stage after the membrane process. The obtained results allowed for listing the integrated systems in the following descending efficiency order depending on the resin being used: MIEX® > SBW > A400 > A200 > A100.
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  • Institute of Environment Protection Engineering, Wroclaw University of Technology, Wybzerze Wyspianskiego 27, 50-370 Wroclaw, Poland
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