Rikabi, Abbas Abdul Kadhim KlaifAbbas Abdul Kadhim KlaifRikabiCuciureanu, AdrianaAdrianaCuciureanuChelu, MarianaMarianaCheluMiron, Alexandra RalucaAlexandra RalucaMironOrbeci, CristinaCristinaOrbeciPopa, Alexandru GeorgeAlexandru GeorgePopaCraciun, Mihaela EmanuelaMihaela EmanuelaCraciun2017-03-292017-03-2920152537-5733http://hdl.handle.net/123456789/526Revista de Chimie (Bucuresti) Volume 66 No 8In 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%).en-USProteins ultrafiltrationComposite membranePolysulfone-magnetitePolysulfone-polyanilineArticle