Colloid-enhanced ultrafiltration in removal of traces amounts of borates from water |
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Authors: | M. Bryjak I. Duraj G. Poźniak |
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Affiliation: | 1.Division of Polymer and Carbonaceous Materials,Wroclaw University of Technology,Wroclaw,Poland |
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Abstract: | The use of colloid-enhanced ultrafiltration for boron removal from water is investigated. Biodegradable surfactant, 1,4-sorbitol oleate, was applied to obtain micelles and high molecular weight chitosan to reinforce their stability. Two kind of membranes were compared: neat porous polysulfone membrane and charged porous sulfonated polysylfone membrane; both with similar average pore diameter of 5 nm. The studies revealed that two key factors affect the boron rejection: presence of surfactant in the colloidal mixture and a repulsion effect of sulfone groups on the membrane surface. Both have a positive effect on boron removal. |
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