Proteins ultrafiltration using polysulfone-polyaniline and polysulfone-magnetite nanoparticles composite membranes

In this paper are presented the results of bovine serum albumin (BSA) aqueous solutions ultra-filtration using composite membranes based on polysulfone (PSf), polyaniline (PANI) or magnetite nano particles (NM).Operating the protein solutions ultra-filtration at 5 bars, pH 4.9 and 7.4, at BSA concentrations of 1 g/L and 1.5 g / L were obtained the results regarding specific permeate flow ranging from 80 to 110 L/m 2 x h and retention between 85 and 99%. Flow-retention results are the best for PSf-PANI composite membrane, and regarding the retention PSf-NM composite membrane is superior to PSf membrane at the same permeate flow. Along with increasing protein concentration in the feed, flow slightly decreases, while retention increases with 1 to 3 units reaching ideal retention threshold (98%).