Microwave Enhanced Synthesis of Sulfonated Chitosan-Montmorillonite for Effective Removal of Methylene Blue

In this work, sulfonated chitosan montmorillonite composite (S-CS-MT) beads were synthesized using a microwave irradiation method designed to have a better saving-time procedure. The potency of S-CS-MT as an adsorbent was assessed for the removal of cationic dyes such as methylene blue (MB) from aqueous solution. The batch adsorption experiments indicated that MB adsorption onto S-CS-MT follows the Pseudo-second-order kinetic and Langmuir isotherm model. The maximum extent obtained from the Langmuir isotherm model for MB adsorption was 188.2 mg g(-1) at 303 K. The thermodynamic study indicated that the adsorption reaction is favorable and spontaneous in nature. These findings indicated that montmorillonite chitosan grafted with the sulfonate group has the ability and efficacy as biohybrid adsorbent for the adsorption of cationic dyes.

Automated summary

In this study, sulfonated chitosan montmorillonite composite beads were successfully synthesized using a microwave irradiation method for efficient dye removal. The adsorption of methylene blue onto the composite followed Pseudo-second-order kinetic and Langmuir isotherm model, with a maximum adsorption capacity of 188.2 mg g(-1) at 303 K. Thermodynamic analysis showed that the adsorption reaction was favorable and spontaneous, indicating the potential efficacy of the composite as a biohybrid adsorbent for cationic dyes.