Novel polyaniline/poly (vinyl alcohol)/clinoptilolite nanocomposite: dye removal, kinetic, and isotherm studies

摘要

In this study, polyaniline/polyvinyl alcohol/clinoptilolite (PANI/PVA/Clino) nanocomposite was obtained by oxidative polymerization of anilinium cations inside and outside of the clinoptilolite channels. The structure and morphologies of the prepared nanocomposite were characterized by utilizing Fourier transform infrared spectroscopy and scanning electron microscopy. The prepared nanocomposite was used as an adsorbent for the removal of meth-ylene blue (MB) dye from aqueous solutions. Furthermore, the adsorption kinetics studies showed that the adsorption process followed intraparticle diffusion model. Also, the investigation of adsorption isotherms showed that the equilibrium adsorption data were well described by the Langmuir isotherm model. It was concluded that chelating interaction between nanocomposite components and MB dye was the governing adsorption mechanism. Finally, desorption-adsorption cycle experiments showed that after 5 cycles; nanocomposite has a good adsorption behavior for MB dye and can be used as economic and efficient adsorbent.