SYNTHESIS AND CHARACTERIZATION OF CARBOXYMETHYL CELLULOSE-GLUTARALDEHYDE-La-GRAPHENE COMPOSITE BEADS AND THEIR APPLICATION FOR REMOVAL OF METHYLENE BLUE

A novel adsorbent was developed through an innovative dual-crosslinking strategy. An environmentally friendly composite adsorbent based on carboxymethyl cellulose (CMC) incorporated with graphene oxide (GO) was prepared for the adsorptive removal of cationic methylene blue (MB). In this method, the synergistic action of La3+ and glutaraldehyde was utilized to fabricate carboxymethyl cellulose-glutaraldehyde-La-graphene composite beads (CMC-GA-La-GO) with significantly enhanced adsorption performance compared to its individual components. This paper outlined the synthesis of CMC-GA-La-GO as a straightforward and environmentally benign process. The raw materials were inexpensive and readily available. The resulting CMC-GA-La-GO beads were characterized by FTIR, XRD, TGA and SEM. Furthermore, the parameters associated with the dosage of the adsorbent were also subjected to optimization. The experimental data for the adsorption process were better fitted by the Langmuir model (R2=0.99), indicating a theoretical maximum adsorption capacity of 113.9 mgg−1, and were found to follow the pseudo-second-order kinetic model. The gained results demonstrated that the CMC-GA-La-GO could be poten