| Abstract: | Polyaniline-intercalated montmorillonite( PANI-MMT)was prepared via in-situ intercalative polymerization and used as the adsorbent for the removal of reactive green 19( RG-19) dye from water. The structure,composition and specific surface area of asprepared composite were characterized using Fourier transform infrared spectroscopy( FT-IR),X-ray diffraction( XRD) and surface area analyzer. The adsorption of RG-19 by PANI-MMT was investigated as a function of contact time,temperature and pH. The results indicated the adsorption kinetics of RG-19 onto PANI-MMT followed the pseudo second-order model best among the pseudo firstorder,pseudo second-order and Elovich kinetic models. The equilibrium data fitted the Langmuir model better than the Freundlich model. Moreover,the maximum adsorption capacity for RG-19 decreased with the increase of initial solution pH. It can be concluded that the PANI-MMT can be a potential adsorbent for RG-19 removal from water. |
