Journal
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
Volume 19, Issue 2-4, Pages 391-406Publisher
SPRINGER
DOI: 10.1007/s10450-012-9462-7
Keywords
Adsorption kinetics; Desorption kinetics; Langmuir kinetics; Generalized integrated Langmuir kinetic equation; Mixed order kinetic equation; Fractal-like kinetics; Intraparticle diffusion model; Pore diffusion model
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Adsorption and desorption of benzoic and salicylic acids and phenol from a series of synthesized mesoporous carbons is measured and analyzed. Equilibrium adsorption isotherms are best described by the Langmuir-Freundlich isotherm. Intraparticle diffusion and McKay's pore diffusion models, as well as mixed 1,2-order (MOE), integrated Langmuir kinetic equation (IKL), Langmuir-Freundlich kinetic equation and recently derived fractal-like MOE (f-MOE) and IKL models were compared and used to analyze adsorption kinetic data. New generalization of Langmuir kinetics (gIKL), MOE and f-MOE were used to describe desorption kinetics. Analysis of adsorption and desorption half-times shows simple relation to the size of carbon pores.
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