ملیحه امینی

Natural cellulose was extracted from Sesbania sesban plant. A novel approach toward chemically modified cellulose bearing active chelating Schiff base was synthesized using 2-hydroxy-5-methyl benzaldehyde. The chemical and structural features of the adsorbent were characterized by fourier transform infrared spectroscopy (FT-IR), scanning Electron Microscopy (SEM), and energy dispersive analysis of X-ray (EDAX) observations, elemental analysis, and thermo gravimetric analysis (TGA). It was used as a cheap and renewable biosorbent for removal cadmium (II). SEM image was confirmed the micro fibril structure of micro composite. TGA was shown that the stability of modified cellulose was increased up in 700°C. EDAX showed the elements of C and O of cellulose and Si and Fe and Cl of modified cellulose base ligand based on 2-hydroxy-5-methyl benzaldehyde. Analysis element confirmed the present of Schiff base ligand in the structure of micro composite. The experimental conditions and adsorption parameters, including pH, initial metal ion concentration and adsorbent dosage were optimized. The cellulose biomass exhibited the highest metal ions uptake capacity (9.39 mg/g) at pH value of 4.0, biomass dosage 0.01 g/l and cadmium concentration of 150 mg/l.