Synthesis, Characterization, and Application as a Chromium(VI) Adsorbent of Amine-Modified Polyacrylamide-Grafted Coconut Coir Pith

The amine-modified polyacrylamide-grafted coconut coir pith carrying −NH3+Cl- functional group at the chain end (PGCP−NH3+Cl-) was investigated as an adsorbent for its possible application for the removal of chromium(VI) from aqueous solution and wastewater. The infrared spectroscopy results were used to confirm the graft copolymer formation and −NH3+Cl- functional group. The grafting of polyacrylamide onto the coir pith improved the thermal...