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Preparation of Crosslinked Chitosan/Eggshell/TiO2 Beads and Their Application in Methyl Orange Adsorption from Aqueous Solution
Electrochemical Material and Sensor (EMaS) Group, School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
*Email Address : limyi613@uitm.edu.my
Abstract : The use of low-cost and environmentally friendly sorbents has been investigated as a viable alternative to the present high-cost methods of removing dyes from wastewater. This study synthesized chitosan/eggshell/TiO2 (CS/ES/TiO2) beads using benzaldehyde, salicylaldehyde, and benzil as the crosslinkers via the hydrothermal method. The CS/ES/TiO2 beads were then investigated for their properties, including basic characterizations and methyl orange (MO) elimination capability. The obtained beads were characterized using FTIR, FESEM, and XRD analysis. FTIR and FESEM data confirmed the formation of chitosan/eggshell/TiO2 beads. The adsorption of MO from an aqueous solution was subsequently examined using the synthesized beads. CS/ES/TiO2-benzaldehyde exhibits the highest adsorption performance with an 81.57% removal of MO under the following conditions: pH = 5; initial MO concentration = 10 ppm; adsorbent dose = 0.3 g; contact time = 120 minutes. This work features that CS/ES/TiO2-benzaldehyde bead can be considered a suitable and effective adsorbent for removing MO from an aqueous solution.
Keywords : Adsorption, Chitosan beads, Crosslinking, Dye removal, Methyl orange