Modeling of the adsorption breakthrough behaviors of Pb2+in a fixed bed of ETS-10 adsorbent

On the basis of experimental breakthrough curves of lead ion adsorption on ETS-10 particles in a fixed-bed column, we simulated the breakthrough curves using the two-phase homogeneous diffusion model (TPHDM). Three important model parameters, namely the external mass-transfer coefficient (k(f)), eff...

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Bibliographic Details
Published in:Journal of colloid and interface science 2008-09, Vol.325 (1), p.57-63
Main Authors: LU LV, YAN ZHANG, KEAN WANG, RAY, Ajay K, ZHAO, X. S
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Porous materials
Surface physical chemistry
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Summary:On the basis of experimental breakthrough curves of lead ion adsorption on ETS-10 particles in a fixed-bed column, we simulated the breakthrough curves using the two-phase homogeneous diffusion model (TPHDM). Three important model parameters, namely the external mass-transfer coefficient (k(f)), effective intercrystal diffusivity (D(e)), and axial dispersion coefficient (D(L)), were optimally found to be 8.33x10(-5) m/s, 2.57x10(-10) m(2)/s, and 1.93x10(-10) m(2)/s, respectively. A good agreement was observed between the numerical simulation and the experimental results. Sensitivity analysis revealed that the value of D(e) dictates the model performance while the magnitude of k(f) primarily affects the initial breakthrough point of the breakthrough curves.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2008.04.067