Indian Journal of Advances in Chemical Science, Volume: 9, Issue : 3, August 2021

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI: 10.22607/IJACS.2021.903011

Research Article

Removal of Rhodamine 6G dye from Water Solution by Alt-maleic anhydride-styrene Copolymer, Cross-linked with Glycerin

ABSTRACT

alt–Maleic anhydride–styrene copolymer, crosslinked with glycerin has been used for removal of Rhodamine 6G dye from aqueous solution. Effects of pH solution, contact time, sorbent dosage, initial concentration of dye and temperature on removal degree have been evaluated. The equilibrium sorption data were fitted to Langmuir, Freundlich and D–R isotherms. The maximum equilibrium sorption capacity from the Langmuir equation is equal to 14.73 mg g–1. The found value of the mean sorption energy from D–R equation (5.472 kJ mol–1) specifies that, sorption of the Rhodamine 6G dye by synthesized polymer–sorbent has a physical character. The morphological features and surface characteristics of the dye–loaded sorbent after sorption have been studied using SEM measurement. The SEM image indicates that the surface of the sorbent non–homogeneous, which connected with accumulation of the Rhodamine 6G dye molecules on the sorbent surface. The kinetic data were correlated well with the pseudo–second order model. The positive values of the thermodynamic parameters ΔG° (7.45-6.04 kJ mol–1), ΔH° (18.378 kJ mol–1) and ΔS° (0.0374 kJ mol–1K–1) indicates that the adsorption process is non–spontaneous, endothermic and randomness in nature.

Key words:   Adsorption, Cross-linked copolymer, Isotherms, Kinetic, Rhodamine 6G dye.

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