SCHIFF BASES AND THEIR POLYMER RESINS IN AQUEOUS SOLUTIONS: AN ANALYTICAL AND ADSORPTION EFFICIENCY STUDY

Abstract

The goal of this study is to synthesize, characterize, and analyse a number of chelating polymer resins containing Schiff base ligands that can be utilized to remediate harmful metal-laden industrial wastewater. We create multiple polymer resins to find the ideal conditions for eliminating numerous metal ions. To avoid water pollution, industrial effluent must be cleaned before disposal because it includes high levels of hazardous metals. Several studies on various physical methods for separating, removing, and managing metal toxicants have been conducted. The condensation of 2-hydroxybenzaldehyde L1 and 1,3 benzodioxole-5-carboxaldehyde L2 resulted in the production of isoniazid Schiff base derivatives, specifically isonicotinic acid hydrazide. The azo-methane ligands were detected through the application of spectroscopic techniques, including infrared spectroscopy, mass spectrometry, and 1H-NMR spectroscopy. Two different ways were used to make polymer resins: formaldehyde was used for L1 and methylene diphenyl diisocyanate (MDI) was used for L2. Thermal analysis was used to test the thermal stability of polymers. The cyclic voltammetry method was also used to investigate the electrochemical properties of the Schiff base ligands. Using time and pH, the chelating efficiency and loading capacity of generated ligands toward various metal ions were examined.