Application of kinetic, isotherm and thermodynamic models for the adsorption of Co(II) ions on polyaniline/polypyrrole copolymer nanofibers from aqueous solution

• The PANI/PPy copolymer was nanofiber in shape and almost uniform in morphology.
• FTIR confirms the presence of both PANI and PPy in the synthesized copolymer.
• This copolymer nanofibers showed considerable potential for the removal of Co(II).
• Adsorption process was controlled by pseudo-second-order model.
• After desorption, adsorbent shows considerable removal efficiency for adsorption.

The aim of this research is to investigate sorption characteristics of polyaniline/polypyrrole copolymer nanofibers (PANI/PPy copolymer nanofibers) for the removal of Co(II) ions from aqueous solution. The adsorbent is characterized using FE-SEM, TEM, FTIR, TGA, DSC and BET surface area. The sorption of Co(II) ions by batch method is applied and the optimum conditions are investigated. In optimum condition, removal efficiency was 99.68% for 100 mg L−1 Co(II) solution. It is found that temperature has a positive effect on the removal efficiency. It can be concluded that PANI/PPy copolymer nanofibers are potentially able to removal of Co(II) ions from aqueous solutions.

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