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The role of membrane charge on nanofiltration performance
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Orientador(es)
Resumo(s)
The effect of the pH on the ultrafiltration performance of natural surface waters with moderate
NOM content was evaluated at a laboratory scale using a plate-and-frame polysulphone
membrane of 47 kDa MWCO. The results at three different pH values (acid, neutral and basic)
demonstrated the important role of the pH on the UF performance controlling the membrane –
fouling matter interactions. The higher fluxes and lower NOM rejections obtained, at basic pH when
compared to acid pH, are explained in terms of the variation of membrane and NOM charge, due
to electrostatic repulsion and adsorption effects.
Descrição
Palavras-chave
Membrane surface charge Membrane pore charge Nanofiltration performance Zeta potential
Contexto Educativo
Citação
Teixeira, M.; Rosa, M.; Nystrom, M.. The role of membrane charge on nanofiltration performance. Journal of Membrane Science, 265, 1-2, 160-166, 2005.