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Title: Film-pore diffusion models : analytical and numerical solutions
Authors: Choy, Keith K. H.
Porter, John Francis
McKay, Gordon
Keywords: Film-pore diffusion
Batch sorption
Analytical method
Numerical method
Acid Blue 80
Acid Yellow 117
Activated carbon
Issue Date: 2002
Citation: Chemical engineering science, v. 59, no. 3, February 2004, p. 501-512
Abstract: The sorption of acid dyes from aqueous effluents onto activated carbon has been studied. The effects of initial dye concentration and activated carbon mass on the rate of Acid Blue 80 and Acid Yellow 117 removal have been investigated. Three mass transport models based on film and pore diffusion control have been applied to model the experimental concentration decay curves. The models are compared on the basis of the solid phase loading capacity using various assumptions since the assignment of an appropriate solid phase loading has been the subject of several papers on this topic and no comparisons have been provided on the effectiveness of each approach. The equilibrium solid phase concentration is assumed: (i) incorporating a time dependant solid phase concentration Ye,t, (ii) equal to the intersection point of the equilibrium isotherm and the operating line and (iii) the point on the equilibrium isotherm where the liquid phase concentration equals the initial concentration in the film-pore diffusion model.
Rights: Chemical Engineering Science © copyright 2003 Elsevier. The Journal's website is located at
Appears in Collections:CBME Journal/Magazine Articles

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