Kinetics and thermodynamics study of brilliant green adsorption on magnetic composite

Author(s):  Pham Thanh Minh, Nuclear Research Institute, Dalat, Vietnam

O.E. Lebedeva, Dr., Prof., Belgorod National Research University, Belgorod, Russia,

Issue:  Volume 41, №25

Rubric:  Chemical sciences

Annotation:  An estimation of kinetic and thermodynamic parameters of adsorption brilliant green dye was carried out for a magnetic composite sorbent obtained from synthetic magnetite and spent coffee grounds. The experiments were performed the temperature range 298–318 K. Sorption of the dye was found to occur in mixed diffusion regime and it could be satisfactorily described by pseudo-second order kinetic equation. Detailed analysis of Г dependence on t1/2 allowed to distinguish three separate stages of the process. The process of adsorption of the brilliant green was shown to be an endothermic one.

Keywords:  coffee wastes, alkaline treatment, magnetic composite sorbent, brilliant green, adsorption, kinetics, thermodynamics.

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