TY - JOUR ID - 168468 TI - Efficiency of Melamine Grafted Chitosan-based Magnetic Nanocomposite for Cationic Dye Adsorption: Kinetics, Isotherms, Thermodynamics JO - Nanochemistry Research JA - NCR LA - en SN - 2538-4279 AU - Dehghani, Hossein AU - Sajedi-Amin, Sanaz AU - Naseri, Abdolhossein AD - Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran Y1 - 2023 PY - 2023 VL - 8 IS - 2 SP - 95 EP - 105 KW - Chitosan KW - Fe3O4 nanoparticles KW - Melamine KW - Dye pollutants KW - magnetic sorbent DO - 10.22036/ncr.2023.02.002 N2 - An adsorption activity of the functionalized magnetic nanoparticles with chitosan-melamine as a sorbent were studied for removal of dyes contaminants from aqueous solution. The morphology, structure, and size of the MA-CS@Fe3O4 nanocomposite have been investigated. The synthesized pH-sensitive adsorbent successfully adsorbs cationic dyes such as basic red and methyl blue. Adsorption experiments were carried out as batch studies at different contact time, pH, initial dye concentration, and adsorbent dosage. The dye adsorption equilibrium was rapid as it was achieved under 30 min of contact time with 5 mg adsorbent. The equilibrium data were analyzed by nonlinear Langmuir and Freundlich model for BR and MB adsorption. The best fitting results were achieved for Langmuir model and confirms that the adsorption of dyes are monolayer and the surface of MA-CS@Fe3O4 sorbent is homogeneous. The pseudo-second-order kinetics can describe the adsorption process for both MB and BR. Thermodynamic study showed that the adsorption was a spontaneous and endothermic process. UR - http://www.nanochemres.org/article_168468.html L1 - http://www.nanochemres.org/article_168468_87544d7c971293616b10efae7bcce779.pdf ER -