حسين حاجي محمدي شيره جيني

Nitrate as a substance whose excessive concentration causes problems in the field of human health, therefore its concentration should be controlled. Various adsorbents have been synthesized in this research to investigate the removal of nitrate, which can be mentioned different types of LDHs, ion exchange resin and modification of nanoparticles with different agents. Also, the nanofiltration membranes, which did not have an acceptable performance against the removal of monovalent nitrate ions, were tried using these nanoparticles in different parts, such as the substrate, middle layer, and selector layer, and the result was checked. Also, different types of synthesis of nanofiltration membranes including TFC, TFN and LBL were investigated. For the successful synthesis of LDH nanoparticles, their characterization was done using Fourier transform infrared spectroscopy (FTIR) and X-ray spectroscopy (XRD).Necessary eva‎luation of the membrane surface morphology, permeability and salt and nitrate removal from the membranes was carried out. The selection for the membrane containing LDH nanoparticles, the optimal amount of which is 0.25% of the weight synthesized through TFC as Na2SO4> MgSO4> MgCl2> NaCl> KNO3 Also, the amount of nitrate removal in membranes without nanoparticles has been investigated and it has been tried to improve the properties of membranes in the direction of nitrate removal by changing the parameters and different types of synthesis.

نانوفيلتراسيون , حذف نيترات , هيدروكسيد دوتايي لايه اي

nanofiltration , nitrate removal , layered double hydroxide

Hossein Hajimohammadi Shirejini

Dr.Toraj Mohammadi