| Autor: |
Vatanpour V; Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, Tehran 15719-14911, Iran.; Environmental Engineering Department, Istanbul Technical University, Maslak 34469, Istanbul, Turkey., Tuncay G; Environmental Engineering Department, Istanbul Technical University, Maslak 34469, Istanbul, Turkey.; National Research Center on Membrane Technologies, Istanbul Technical University, Maslak 34469, Istanbul, Turkey., Teber OO; National Research Center on Membrane Technologies, Istanbul Technical University, Maslak 34469, Istanbul, Turkey.; Nano Science and Nano Engineering Department, Istanbul Technical University, Maslak 34469, Istanbul, Turkey., Paziresh S; Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, Tehran 15719-14911, Iran., Tavajohi N; Department of Chemistry, Umeå University, Umeå 90187, Sweden., Koyuncu İ; Environmental Engineering Department, Istanbul Technical University, Maslak 34469, Istanbul, Turkey.; National Research Center on Membrane Technologies, Istanbul Technical University, Maslak 34469, Istanbul, Turkey. |
| Abstrakt: |
This study investigates the synthesis and characterization of Schiff base network-1 (SNW-1) covalent organic framework (COF) nanomaterials and their application in the fabrication of thin-film nanocomposite (TFN) membranes. The embedding of SNW-1 COF in reverse osmosis (RO) membranes with a polysulfone (PSf) substrate was done using the interfacial polymerization method. The result of the study demonstrated that the porous and hydrophilic structure of the COF increased the hydrophilic properties of the produced RO membranes. When the COF was embedded with a concentration of 0.02 wt %, the hydrophilicity of the RO membrane was higher than that of the other membranes, with a contact angle value of 45.2°. Pure water flux, saline solution flux, and humic acid (HA)/sodium chloride (NaCl) foulant solution flux were measured to determine the membrane performance, and it was found that as the COF ratio increased, the fluxes increased up to a certain concentration rate. The RO membrane with a SNW-1 concentration of 0.005 wt % had the highest values of pure water flux and saline solution flux with high salt rejection (34.2 and 32.2 LMH, 97.1%, respectively) and was the most resistant membrane against fouling. This study presents the potential of the SNW-1 COF with precise design capabilities and controlled unique properties as an additive for desalination applications. |
