Abstract
Chitosan, a biopolymer is a natural polysaccharide showing excellent property of adsorption of toxic metal ions present in wastewater. The use of chitosan (CS) is growing exponentially due to its wide range of application in the field of science and technology. The removal of heavy metal ions from aqueous medium is the reflection of adsorption efficiency of chitosan. We have applied the concept of nanotechnology in the form of Magnetite (Fe3O4)nanoparticles and coated them with our polymer CS to obtain Magnetic Chitosan Nanoparticles (MCNs). The objective of this review is to focus on the performance of magnetized nanoparticles of chitosans as adsorbents for the removal of heavy metals from aqueous medium. The magnetised nanocomposites of chitosans are with fast rate of adsorption for removal of pollutants as they are easy to recover using an external magnet. This review outlines the synthesis of MNCs and their subsequent characterization on the basis of spectroscopic techniques namely X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Thermal Gravimetric Analysis (TGA). Adsorption performances of different MNCs for toxic metal ions viz zinc, cadmium, lead and copper etc. were studied by using VA computrace 797, Metrohm (Switzerland). Voltammetric instrument provides both qualitative and quantitative analysis of the metal ions present in the given sample via current-voltage graph. KeywordsChitosan; Magnetite (Fe3O4); Nanotechnology; Adsorption; Voltammetry
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