Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 20, Issue 5, Pages 3678-3688Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2013.12.066
Keywords
Adsorption; Cd(II); PANI/PPy/HMS; Kinetic; Isotherm
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A composite of polyaniline/polypyrrole/hexagonal type mesoporous silica (PANI/PPy/HMS) was prepared, characterized by FE-SEM, FT-IR, XRD, TGA and BET analysis and applied in investigation of its adsorption characteristics for the removal of Cd(II) ions from aqueous solutions. Batch mode experiments were conducted and four kinetic models were used to describe the adsorption process. The adsorption kinetics results showed that the adsorbent had high affinity to Cd(II) in aqueous solutions, and the adsorption reached equilibrium within 8 min. The experimental data were fitted very well with the pseudo-second-order kinetic models. The equilibrium adsorption data were best fitted with the Freundlich isotherm. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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