Synthesis, characterization and applications: Novel terpolymer and its composite

Abstract

A new approach for the treatment of effluent streams has been developed by synthesizing an innovative chitosan based terpolymer composite gaining a considerable attention in the wastewater treatment community. The present research article reports on the synthesis of terpolymer composite from 4,4′ – oxydianiline, carbohydrazide with formaldehyde and chitosan for the recovery of toxic and heavy metals from aqueous solutions. The synthesized adsorbents have been characterized by elemental analysis, spectral studies and surface morphology by scanning electron microscopy. Batch separation technique has been used in the ion-exchange process for the removal of selective metal ions like Co2+, Cd2+, Pb2+, Hg2+ by terpolymer and its composite. The results revealed that both the adsorbents are good ion-exchanger however, the composite act as better ion exchanger than the terpolymer. It may be due to the more active sets of amine and carbonyl groups present in terpolymer ligand and the size of particle, high porous and greater surface area, this result investigated by SEM analysis. The results of recovery of toxic metals were matched with the earlier reported terpolymer resins. The adsorption isotherm models were investigated and the results were found well fitted with Langmuir isotherm compared to Freundlich isotherm and follows first order kinetics.