Abstract
In the present study, the chitosan/cobalt ferrite nanofibrous adsorbent was produced via electrospinning process and its application for the removal of Pb(II) and Cr(VI) ions from aqueous systems was investigated. The cobalt ferrite nanoparticles were synthesized via convectional hydrothermal method and were characterized using XRD, SEM and TEM analysis. The influence of sorption parameters in a batch mode including cobalt ferrite content, pH, contact time, metal ions initial concentration and temperature on the sorption efficiency of Pb(II) and Cr(VI) ions was evaluated. The kinetic data were fitted using pseudo-first-order and pseudo-second-order kinetic models and the isotherm models including Freundlich, Langmuir and Redlich-Peterson were used to describe the equilibrium data of Pb(II) and Cr(VI) sorption using synthesized nanofibrous adsorbent. Thermodynamic parameters investigation showed the spontaneous and endothermic sorption of Pb(II) and Cr(VI) ions. The Pb(II) and Cr(VI) sorption efficiency was also examined during five sorption-desorption cycles by regeneration of nanofibers via 1 M HNO3. The simultaneous influence of metal ions initial concentration on the Pb(II) and Cr(VI) sorption in a binary system was also investigated.
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