The adsorbent was characterized by FT-IR, thermogravimetry, Brunauer–Emmett–Teller surface area measurement and elemental analysis, and it proved that the organic functional group, carboxyl group, was grafted successfully onto the silica gel surface.
The adsorbent wascharacterized by FT-IR, thermogravimetry, Brunauer–Emmett–Teller surface area measurement and elemental analysis, and it proved that the organic functional group, carboxyl group, was grafted successfullyonto the silica gel surface.