Preparation and Characterization of Nanofiltration Polysulfone membranes Filled by Cellulose/Nano Silica Composite Sorbent
Paper ID : 1225-MST2015-FULL
Authors:
Peyman Pouresmaeel Selakjani *1, Majid Peyravi2, Mohsen Jahanshahi3
1Membrane Research Group, Nanobiotechnology Institute, Babol University of Technology
2Membrane Research Group, Nanotechnology Institute, Babol University of Technology, Babol, Iran
3Babol University of Technology
Abstract:
Nanofiltration membranes with different ratios of cellulose/nano silica (C/NS) fillers have been used to remove Crystal Violet (CV) dye solutions. Prior to this goal, nano silica was synthesized from rice husk (RH) and connected with cellulose fibers by mean of physical linkage using positive and negative surfactants. FTIR spectra were used to determination of sorbent and SEM micrograph was used to determine the morphology of prepared nano silica. The prepared composite fibers used in different ratios in the casting solution of polysulfone (PSf) nanofiltration membranes. The solutions with 20% of PSf and 0-0.5% of C/NS in Dimethylacetamide were prepared to use in casting and phase inversion process. Dispersion of filler in the membranes was detected by mean of light microscope after performance test and counting the colored fibers. To characterization of membranes a reverse osmosis (RO) setup has been employed. At the pressure of 5bar the maximum flux of membranes was about 5.22 kg/m2h that belong to the membrane with highest fiber filler ratio (0.5%). Rejection of membranes was measured by spectrophotometer at wavelength of 580nm. The best CV removal was for sample with 0.1% of C/NS with 96.28% dye rejection. According to achieved results this membrane type can be sued in dye removal from aqueous solution. On the other hand a sorbent with high specific surface has been modified and used as modifier of membrane performance.
Keywords:
Nanofilteration, cellulose, nano silica, dye removal, polysulfone
Status : Paper Accepted (Poster Presentation)