In
this study, polyaniline-coated filter papers PANI (ES)-FP and
PANI (EB)-FP have been synthesized by chemical oxidation polymerization.
This is a cost-effective and simple method of preparing PANI film
on an inexpensive filter paper. The PANI coated filter papers were
characterized by UV–vis, IR, thermogravimetric analysis and
scanning electron microscopy. These composite materials have been
effectively used for adsorption of seven different dyes from aqueous
medium. It has been observed that these are good materials for anionic
and cationic dye adsorption. Detailed equilibrium and kinetic studies
have been reported here by taking Eosin yellow and Methylene blue
as anionic and cationic model dyes. The experimental data for Eosin
yellow and Methylene blue adsorption were best fitted in Freundlich
and Langmuir adsorption models, respectively. The Langmuir adsorption
capacity of Eosin yellow and Methylene blue on PANI (ES)-FP and PANI
(EB)-FP were 4.3 and 1.3 mg g–1, respectively, at
neutral pH. Adsorption of both dyes follows second order kinetic model.
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