Removal of Heavy Metals using Amine Crosslinked Reduced Graphene Oxide

Abstract

Graphene oxide was synthesized by modified Hummers method and then reduced with hydrazine hydrate to obtain reduced graphene oxide. (3aminopropyl)trimethoxysilane used as a precursor for amine functionalized reduced graphene oxide. The amine functionalized nanoparticles were characterized using FT-IR, TGA, Raman, N 2 sorption, SEM and TEM techniques. The surface area was found to be 346 m 2 /g due to functionalization of amine over reduced graphene oxide. The amine functionalized nanoparticles were used as adsorbent for the removal of heavy metals from aqueous solution. The adsorption of heavy metal was high for the reduced graphene oxide nanocomposites when compared to bare amine functionalized nanoparticles. The maximum adsorption reached within fifteen minutes.

Graphene Oxide-Based Nanofiltration for Hg Removal from Wastewater: A Mini Review

“…Besides modifying the aqueous mercury into a complex species which has special surface properties, it is also possible to modify the membrane thus enhancing the separation process. Some researchers [ 81 , 148 , 149 , 150 ] have introduced functionalized graphene sheets constructed by holes in a graphene sheet which is modified by some agents that improve the surface properties. Figure 4 illustrates a functionalized graphene where the holes are modified by other functional groups.…”