Chemical Modification of Chitosan as An Adsorbent for The Removal of Dyes

Aishwarya Muralidharan Nair, Devika K S, Saraswathy Nachimuthu, Ramalingam Ponnusamy and Dymphan Gonsalves

International Journal of Scientific Research in Science and Technology, 2025, vol. 12, issue 1, 667-675

Abstract: Chitosan beads were chemically modified by cross-linking with aldehydes such as valeraldehyde, octanal, o-phthalaldehyde and 9-phenanthrenecarboxaldehyde in order to obtain chitosan Schiff base beads. Chemically modified beads were characterized using FTIR, XRD and elemental analysis (C, H and N). Three cycles of adsorption and desorption studies were performed, modified beads were used for the removal of both Brilliant Blue and Methyl Orange dyes. The chitosan-Schiff base beads exhibited exemplary dye removal efficiency and maintained their ability throughout three cycles. The desorption study was performed using 70% ethanol as a desorbing agent, the desorption study revealed that the modified beads can be regenerated and can be employed as a favourable adsorbent industrially to remove acid dyes from wastewater.

Keywords: Chitosan; Modification; Schiff base; Aldehydes; Adsorption; Desorption (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:etm:ijsrst:v12:y2025:i1:id:620

DOI: 10.32628/IJSRST2512158

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