CHITOSAN ASSISTED FE-AL DOUBLE LAYERED HYDROXIDE/REDUCED GRAPHENE OXIDE COMPOSITES FOR AS(V) REMOVAL

Abstract

In this work, a highly efficient Chitosan assisted Fe-Al double layered hydroxide/reduced Graphene Oxide (FAH-rGO/CS) nanocomposite absorbents were synthesized by using a simple hydrothermal and ex-situ polymerization process for As (V) removal in wastewater. The FAH and CS moieties provoke the adsorption capacity of GO through the interaction of matrix surface with the composite material due to which a high removal capacity of 97% was achieved. The crystalline structure and morphology of the samples were investigated by XRD, SEM, FESEM and HRTEM. The elemental compositions and functional groups of samples were analyzed by EDS and FTIR. The high adsorption capacity of FAH-rGO/CS-4 is attributed to their increased surface areas (122.57 m2 g-1) which were analyzed by N2 adsorption-desorption analysis. The various parameters like the effect of contact time, pH, adsorbent dosage, adsorption isotherms and kinetics were used to study the various adsorption properties of adsorbent and proved to be highly effective adsorbent for As (V) removal.