Preparation of New Chelate Polymers and Evaluation of Their Ability to Treat Iron (III) Ion in Wastewater

Two types of schiff bases were prepared from the condensation of (2,4-dihydroxybenzaldehyde), (4-hydroxybenzaldehyde) with (3-aminophenol) respectively, and the prepared ligands were characterized by FT-IR spectroscopy and 1HNMR spectroscopy. The complexes formed with iron (III) were identified for each of the prepared ligands spectroscopically (UV-VIS), where the first complex (L1 Fe) gave a redshift, while the second complex (L2 Fe) gave a blue shift.Then, polyurethane foam was prepared and grafted with the prepared Schiff bases to obtain a chelated polymer (R1, R2). The prepared resin was characterized by infrared spectroscopy (FT-IR) and thermal analysis techniques (TGA, DSC). This research focused on studying the analytical efficiency of the surface prepared using the batch method under the optimal conditions of equilibrium time and acid function. It was applied practically to a wastewater sample, which gave a removal rate of iron (III) ion of 100% which indicates the possibility of using the prepared chelated polymer over a wide range to remove contamination of iron (III) ion which ultimately improves the quality of wastewater treatment