Paper Title
Adsorption of Pb(Ii) from Aqueous Solution using Ecofriendly Guar Gum/Activated Carbon Nanocomposite

Abstract
As water pollution due to disposal of heavy metals continues to be a great concern worldwide. Therefore, herein, we have reported the green synthesis of novel Guar gum/ Activated carbon nanocomposite and explored it for the removal of toxic and carcinogenic heavy metal- Pb(II) from aqueous solution. The nanocomposite was characterized by Scanning electron microscope (SEM), Transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) techniques to study the structural, chemical and crystalline properties of nanocomposite. The removal of Pb(II) from aqueous solution was investigated under batch conditions. The batch method was employed for the parameters such as pH, contact time and initial concentration. The optimum pH and contact time for the removal of Pb(II) using nanocomposite were found to be 5 and 180 min, respectively. Isotherm modelling was carried out and the results indicated that the Langmuir model described the uptake of Pb(II) better than Freundlich model. The kinetic study showed that the pseudo-second order model was the best obeyed model, affirming chemisorption as the rate determining step in the adsorption of Pb(II) onto the surface of nanocomposite. Therefore, the present green nanocomposite holds potential application in the sequestration of heavy metal ion from aqueous solution.