Using PVA@WNS Composite as Adsorbent for Methylene Blue Dye from Aqueous Solutions

The PVA@WNS composite has been successfully prepared by attaching the polyvinyl alcohol and Walnut shell powder with (1:1) ratio from plant and has been analyzed by using FTIR, SEM, and AFM, and then it was used as an adsorbent of methylene blue dye from synthetic wastewater. The adsorption of MB dye on the PVA@WNS composite was studied as a function of contact time and concentration. Isotherm adsorption was also described by the Langmuir and Freundlich models. It was found that Langmuir isotherm (R^2= 0.933) is better than the Freundlich model (R^2= 0.925) which implies that the MB adsorption on PVA@WNS composite was monolayer. Thus, qmax calculated from the Langmuir model was found to be 5.938 mg.g^−1 and was consistent with the experimental data. The synthesized PVA@WNS composite showed an excellent activity towards the removal of methylene blue from synthetic wastewater.