Polypyrrole/montmorillonite composite used as an adsorbent for the removal of congored from aqueous solution

Author(s): Murugan Karthikeyan, P.Sathya, Konda K.Satheeshkumar

This study reveals the possibility of the use of Conducting polymer/ inorganic hybrid composites. They have large surface areas, which makes the adsorbent properties of the polymer composites as good the constituents. Polypyrrole/montmorillonite (PPy/MMT) composite was prepared, characterized (Fourier transform infrared, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction patterns) and used as adsorbents for the removal of congored fromaqueous solution by batch adsorptionmethod. The spectra of before and after the adsorption are recorded to get better knowledge regarding the mechanism of the adsorption process. The results indicated that the removal of congored from wastewater by PPy/MMT composite occurs via physico-chemical mechanism. The amount of congored removed by PPy/MMT is 46.5 mg/g at 50oC. This study obey Freundlich adsorption isotherm than Langmuir. The adsorption of Congo red onto polypyrrole/Montmorillonite was spontaneous at higher temperature and lower concentration. Change in enthalpy suggests the process is endothermic in nature.

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