Abstract
A batch adsorption system was applied to study the adsorption of p-nitrophenol onto chitosan flakes and a cross-linked chitosan beads. The cross-linked chitosan beads were prepared using glutaraldehyde (GLA), a cross-linking agent, to enhance the chemical resistance and mechanical strength of chitosan beads. Adsorption experiments were carried out as function of pH, agitation period, agitation rate and different concentration of p-nitrophenol. Langmuir and Freundlich adsorption models were applied to describe the isotherms and isotherm constants. Equilibrium data agrees very well to the Freundlich model giving adsorption capacity of 0.63 mg g −1 for chitosan flakes and 2.48 mg g −1 for chitosan–GLA beads. The kinetic experimental data properly correlated with the second-order kinetic model with a rate constant of 3.82 × 10 −1 g mg −1 min −1 and 3.34 × 10 −1 g mg −1 min −1 for chitosan flakes and chitosan–GLA beads, respectively. Results showed that chitosan flakes and chitosan–GLA beads are favourable adsorbents.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
