Comparative Adsorption of Fe(III) and Cd(II) ions on Glutaraldehyde Crosslinked Chitosan-coated Cristobalite

In this study, chitosan was crosslinked with glutaraldehyde and coated on the surface of cristobalite through a dip and phase inversion process. The adsorbent was used in batch experiments to evaluate the adsorption of Fe(III) and Cd(II) ions. A maximum adsorption capacity was observed at a glutaraldehyde concentration in sorbent preparation of 1% (w/w). The equilibrium adsorption quantity was determined to be a function of the solution pH, initial concentration and agitation period. Langmuir and Freundlich adsorption models were used to describe adsorption isotherms.