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Membrane Water Treatment
  Volume 4, Number 2, April 2013, pages 83-93

Development of sulfonated polysulfone composite membranes for ammonium rejection
Edna T.R. Bastos, Celina C.R. Barbosa, Jaciara C. Silva, Vanessa B.C. Queiroz and Delmo S. Vaitsman

    In the present investigation, were synthesized composite membranes prepared by simultaneous casting of two polymer solutions using the technique of phase inversion by immersion / precipitation. The support layer was prepared using polyethersulfone and polysulfone as base polymer and for the top layer was used sulfonated polysulfone (SPSU) with 50% sulfonation degree. The morphology of the resulting membranes were characterized by scanning electron microscopy (SEM). The final results showed that it is possible to prepare composite membranes by simultaneous casting of two polymer solutions with adherence between the two layers. Regarding the permeation tests, the developed membranes presented values of hydraulic permeability within the range of commercial nanofiltration (NF) membranes. Values rejection of 80% ammonium ions can be increased by using a SPSU with a greater degree of sulfonation.
Key Words
    polysulfone sulfonated; composite membrane; ammonium rejection
Edna T.R. Bastos and Celina C.R. Barbosa: Instituto de Engenharia Nuclear (IEN / CNEN), Rua Helio de Almeida 75 - 21941-906 - Rio de Janeiro - Brazil; Jaciara C. Silva and Vanessa B.C. Queiroz: Bolsista CT/Petro; Delmo S. Vaitsman: Departamento de Quimica Analitica, Instituto de Quimica, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 149, room A-519 - 21941-909 - Rio de Janeiro - Brazil

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