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Kinetics and Thermodynamics of Sorption of Ni~(2+) Macroporous Adsorption Resin D113

Huang Wei-hua

Abstract

Adsorption kinetics and thermodynamics of Ni2+ in solution was studied.Kinetic studies indicated that Ni2+ adsorption onto resin D113 conforms to pseudo-first-order equation and pseudo-second-order equation.The adsorption was controlled by pore diffusion.In the experimental temperature,thermodynamic studies indicated that Ni2+ adsorption onto resin D113 conforms to Langmuir adsorption isotherm.Heat of adsorption value of 15.1306kJ/mol indicated the radioactive nature of adsorption process.A decrease of Gibbs free energy with increasing temperature also indicated the spontaneous nature of the process.

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Key concepts: Adsorption, Thermodynamics, Gibbs free energy, Sorption, Kinetics, Chemistry, Diffusion, Langmuir adsorption model