Adsorption of Orange 3R by chitosan modified montmorillonite nanocomposite

Document Type : Research Article

Author

Department of Chemistry, Safadasht Branch, Islamic azad University, Tehran, Iran

Abstract
The objective of this research is to adsorbe Orange 3R dye by a new catalyst chitosan-montmorillonite magnetic (CTS-MMT-Fe3O4) was used as an effective adsorbent for the adsorption of anions. In this research, the adsorption of Orange 3R dye as an anionic sulphonated reactive azo dye, from aqueous solution by CTS-MMT-Fe3O4 nanocomposite was investigated. The synthesized nanocomposite was characterized by FTIR (Fourier transform infrared), XRD (X-Ray diffraction) and SEM (Scanning Electron Microscopy) to evaluate the surface morphology. Adsorption experiments were conducted at room temperature in batch system. The effects of pH, initial concentration of dye, contact time and adsorbent dosage were investigated. Kinetic and equilibrium sorption parameters were evaluated pseudo-first and pseudo-second order rate models and Langmuir and Freundlich isotherms. The results indicated that the adsorption of dye onto adsorbent was better described by the pseudo second-order compared to by the pseudo-first-order. Also, the experimental data were better fitted to the Langmuir model with high R2 value (R2=0.99) than Freundlich model for adsorption. The thermodynamic studies showed that the adsorption is spontaneous and feasible. The present study indicated that CTS-MMT-Fe3O4 could be employed as an effectively adsorbent for the adsorption of Orange 3R from industrial and other effluents.

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  • Receive Date 01 March 2023
  • Revise Date 11 March 2023
  • Accept Date 11 March 2023