Bioresour Technol, vol. 100, issue 1 (2009) pp. 194-199
A new biosorbent was developed by coating chitosan, a naturally and
abundantly available biopolymer, on to polyvinyl chloride (PVC) beads.
The biosorbent was characterized by FTIR spectra, porosity and surface
area analyses. Equilibrium and column flow adsorption characteristics
of copper(II) and nickel(II) ions on the biosorbent were studied.
The effect of pH, agitation time, concentration of adsorbate and
amount of adsorbent on the extent of adsorption was investigated.
The experimental data were fitted to Langmuir and Freundlich adsorption
isotherms. The data were analyzed on the basis of Lagergren pseudo
first order, pseudo-second order and Weber-Morris intraparticle diffusion
models. The maximum monolayer adsorption capacity of chitosan coated
PVC sorbent as obtained from Langmuir adsorption isotherm was found
to be 87.9 mg g(-1) for Cu(II) and 120.5 mg g(-1) for Ni(II) ions,
respectively. In addition, breakthrough curves were obtained from
column flow experiments. The experimental results demonstrated that
chitosan coated PVC beads could be used for the removal of Cu(II)
and Ni(II) ions from aqueous medium through adsorption.
Choose a citation style from the tabs below