List of Articles پلی اترسولفون

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  1 - Simultaneous Removal of Copper And Lead Metal Ions From Polluted Water Using Polymer Membrane Modified With Amorphous Silica Nanoparticles
  Bahareh Kamyabmoghadas Nadia Tamimi
  Introduction: Heavy metals are one of the main water pollution in environmental problems. There are various methods to remove these pollutions, one of the best methods in this field is membrane processes. The purpose of this research is to remove heavy metals because th More

  Introduction: Heavy metals are one of the main water pollution in environmental problems. There are various methods to remove these pollutions, one of the best methods in this field is membrane processes. The purpose of this research is to remove heavy metals because they are toxic and have many harmful effects on the health of living organisms and the environment. For this purpose, modified polymer membranes were used, which can remove a large percentage of copper and lead ions dissolved in water at the same time. Materials and Methods: In this research, polyether sulfone polymer, N-dimethylacetamide solvent and amorphous silica nanoparticles were used as modifiers. The parameters of the experiment were polymer weight percentage (22-18-14%), nanoparticles weight percentage (0.0-0.1-0.2 weight percent of polymer) and pressure (12-17-22 bar). Results and Discussion: The optimal conditions obtained were 22% polymer membrane, 2% additives at 12 bar pressure, and the result of the test in these conditions was the removal of 74% and 82% of lead and copper, respectively. From the prepared membranes, Fourier transmission infrared spectroscopy (FTIR), scanning electron photography (SEM) and thermometric analysis (TGA) tests were performed. In FTIR analysis, peaks related to functional groups were determined. By examining the SEM test, the presence of silica nanoparticles in the polymer membrane was determined, and the TGA analysis in the modified membrane confirmed the increase in the thermal resistance of the membranes. Conclusion: According to the results obtained from the TGA test, it was found that the membrane modified with silica nanoparticles causes more delay in the degradation time, and the thermal resistance of the membranes modified with silica nanoparticles increases more, as a result, the presence of silica nanoparticles increases the stability of the membrane. According to the comparison and examination of the FT-IR test related to pure nanoparticles, pure polymer membrane and membranes with nanoparticles, in addition to identifying the peaks of the functional group of polyether sulfone polymer, the presence of the peak of silica nanoparticles in the modified membranes was also determined. that the presence of silica nanoparticles inside polyether sulfone polymer membranes was established. Manuscript profile
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  2 - A review of polysulfone and polyethersulfone based mixed matrix nanofiltration membranes/carbon nanoparticles
  Nader Gholami Hossein Mahdavi
  Although the membrane technology has advantages such as the high capability of separation, flexibility of operation, efficiency, etc. compared to conventional methods, fouling is the main limitation for the further use of membrane technology, mainly because of the inher More

  Although the membrane technology has advantages such as the high capability of separation, flexibility of operation, efficiency, etc. compared to conventional methods, fouling is the main limitation for the further use of membrane technology, mainly because of the inherent hydrophobicity of membrane materials. To overcome this drawback, nanocomposite membranes are used. Among membrane processes, nanofiltration has applications in groundwater, surface water and wastewater treatment as well as pre-desalination operations. Since NF process is performed at a lower pressure, it is a much more energy efficient process. In this review, modification of polysulfone/polyatersulfone membranes is investigated with regards to anti-fouling performance. The mechanism of fouling reduction clearly shows that surface hydrophilicity improves at the polysulfone/polyatersulfone membranes, based on different membrane modification methods. In addition, the fabrication of nanocomposite membranes resulting from the participation of nanoparticles in the polymeric matrix mixed membrane, their properties and applications using organic fillers (such as graphene and carbon nanotubes) have been thoroughly studied.Furthermore, the characterization techniques applied for modified membranes have been discussed.This comprehensive study concludes with some recommendations for future research and development of NF membranes.   Manuscript profile