Synthesis, characterization and sorption potentials of dialdehyde starch aminophenol Schiff’s base

Abstract

Extraction of native cassava starch, its oxidation, modification and chelation of the products were achieved. Schiff’s base type Dialdehyde aminophenol was prepared by the reaction of orthoaminophenol and dialdehyde starch from periodate oxidized cassava starch. The modified starch aminophenols with different aldehyde content were tested for their adsorptive affinity for Cu(II), Cr(II) and Mn(II) ions. The modified starch was characterized by Fourier transformed infrared (FT-IR) spectroscopy, Scanning electron microscopy (SEM), elemental analysis, solubility test, Magnetic susceptibility and magnetic moment and, melting/decomposition temperature. The modified starches and the polymeric complexes have been found to have an improved physicochemical properties and the polymeric chelating ligand could be used to remove Cu(II), Cr(II)and Mn(II)ions from aqueous solution. Also the polymeric complex was found to have good cross linking ability when reacted with the metal salt.

Keywords: Dialdehyde starch, Native Starch, Orthoaminophenol, Polymeric Chelating ligand, Sorption