INVESTIGADORES
OCHOA Nelio Ariel
artículos
Título:
Fouling behavoiur of polyethersulfone UF membranes made with different PVP
Autor/es:
J.MARCHESE; M. PONCE; N.A. OCHOA; P. PRADANOS; A. HERNANDEZ
Revista:
JOURNAL OF MEMBRANE SCIENCE
Editorial:
Elsevier
Referencias:
Año: 2003 vol. 211 p. 1 - 11
ISSN:
0376-7388
Resumen:
Several polyethersulfone (PES) ultrafiltration membranes have been made with small quantities of polyvinyl-pyrrolidone(PVP) of different molecular weights to increase the permeability without a significant reduction in selectivity. The correspondingfouling mechanism and subsequent structural modifications have been analyzed when in contact with bovine serumalbumin (BSA) and dl-histidine (DLH). It has been shown that according to the relative sizes of solute and pores of the membranes:BSA fouls the three membranes externally whereas DLH fouls them internally. Moreover, BSA fouls the non-PVPmembranes faster than DLH fouls them slower, according to the action of hydrophobic and electrostatic forces acting at theworking pH (4.9). The changes in structure, remaining after water rinsing, is quite similar for the three membranes and boththe solutes, as obtained by a r etention test of adequate polyethylene glycols (PEGs).
