Adsorption Kinetics for Removal of Congo Red Dye from Textile Waste Water using Al-TiO2/PANI Nanocomposites
Keywords:
Polyaniline, Nanocomposites, Titanium dioxide, Aluminium, UV-Vis spectroscopy, Congo red dyeAbstract
In this paper we report the fabrication of Al doped TiO2 nanofibers by electrospinning and preparation of electrospun Al-TiO2/polyaniline (PANI) nanocomposites by in-situ chemical oxidation polymerization and its application for the removal of Congo red dye from aqueous solution. The morphology of the prepared nanocomposites was studied by scanning electron microscopy. Adsorption kinetics of synthesised nanocomposites was studied by UV-visible spectroscopy. Percentage of removal of Congo red dye using Al-TiO2/PANI was found to be 76%. In order to evaluate adsorption kinetics, the pseudo first order model, pseudo second order model, and intra particle diffusion model were studied. The pseudo second order model was found to me more linear than other models which indicate that the adsorption of dye is a surface phenomenon and it depend on both concentration of dye and concentration of material. Experimental data suggested that adsorption is one of the best methods to remove Congo red dye from waste water disposed by textile industries.
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