Abstract
Dialdehyde cassava starch (DAS) was prepared and characterized. Polymeric chelating ligands containing 2,3-diaminopyridine have been prepared from dialdehyde starch, the removal of copper(II), nickel(II) and cadmium(ii) ions from aqueous solutions by dialdehyde 2,3- diaminopyridine starch (DAS2,3-DNH 2 PYR) was investigated. The adsorbent degree of substitution (DS) 0.82 was characterized by solubility test, Fourier Transform Infrared spectroscopy (FT-IR), elemental analysis, and Scanning Electron Microscopy (SEM). Batch adsorption has been performed to identify the binding property of metal (ii) ions. The maximum adsorption capacity was found to be 31.1mg/g for cadmium and nickel, 30mg/g for copper, and removal efficiency was 78%, 77.77% and 75% for cadmium, nickel and copper respectively. Polymeric chelating ligand could therefore be used to remove the metals from aqueous solution. Keywords : Starch Polymer, Dialdehyde starch, Starch 2, 3-Aminopyridine, Chelating resin.
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