Membrane and Water Treatment

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Development of sulfonated polysulfone composite membranes for ammonium rejection

  • Bastos, Edna T.R. (Instituto de Engenharia Nuclear (IEN / CNEN)) ;
  • Barbosa, Celina C.R. (Instituto de Engenharia Nuclear (IEN / CNEN)) ;
  • Silva, Jaciara C. (Bolsista CT/Petro) ;
  • Queiroz, Vanessa B.C. (Bolsista CT/Petro) ;
  • Vaitsman, Delmo S. (Departamento de Quimica Analitica, Instituto de Quimica, Universidade Federal do Rio de Janeiro)
  • Received : 2012.10.30
  • Accepted : 2013.02.06
  • Published : 2013.04.25
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Abstract

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.

Keywords

References

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