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Abstract
Transport properties of a new type of filtering material, prepared by tangential filtration of a protein solution on a macroporous ceramic support, were determined. Retention characteristics were studied by filtration of polyethylene glycol solutions with various molecular weights at different pH and ionic strengths. The pore radii (1.5 nm) were estimated from pure water hydraulic permeability and reflection coefficients through the use of a theoretical model based on the Verniory pore theory. The protein layer morphology was examined by scanning electron and atomic force microscopy.
ACKNOWLEDGMENTS
The authors wish to acknowledge Professors A. Cardenas, O. Rojas, and J-L. Salager of the Universidad de Los Andes for their help. The stay in France of one of the authors (J. Bullón) was made possible by a CONICIT-Venezuela (Universidad de Los Andes) scholarship and by the French-Venezuelan cooperative program PCP “Surfactants and Applications.”