Two-phase homogeneous diffusion model for the fixed bed sorption of heavy metals on natural zeolites

V. J. Inglezakis, M. M. Fyrillas, M. A. Stylianou

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In this work, the fixed bed removal kinetics of Pb2+, Zn2+, Mn2+, Cr3+, Fe3+ and Cu2+ from aqueous solutions on natural zeolites was studied. For this aim, a non-dimensional two-phase homogeneous solid diffusion model including axial dispersion and equipped with a universal double-selectivity equilibrium model is developed and applied. In total 9 isotherms, representing 128 experimental points and 25 breakthrough curves, representing 764 experimental points are used in modeling. The application of the model is satisfactory resulted in an average deviation from the experimental data of 11.19 ± 5.53%. The solid phase diffusion coefficients are between 10−7 and 10−9 cm2/s depending on the metal, flow rate and particle size in the decreasing order of Cu > Fe, Cr > Zn, Pb > Mn. The study is supplemented by an extended literature review on fixed bed models and experimentally derived solid phase diffusion coefficients in zeolites.

Original languageEnglish
Pages (from-to)164-176
Number of pages13
JournalMicroporous and Mesoporous Materials
Volume266
DOIs
Publication statusPublished - Aug 1 2018

Fingerprint

Zeolites
heavy metals
Heavy Metals
zeolites
sorption
Heavy metals
Sorption
beds
solid phases
diffusion coefficient
Diffusion in solids
Isotherms
isotherms
flow velocity
selectivity
Metals
Particle size
Flow rate
aqueous solutions
deviation

Keywords

  • Adsorption
  • Clinoptilolite
  • Diffusion coefficients
  • Fixed bed modeling
  • Heavy metals
  • Zeolites

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

Cite this

Two-phase homogeneous diffusion model for the fixed bed sorption of heavy metals on natural zeolites. / Inglezakis, V. J.; Fyrillas, M. M.; Stylianou, M. A.

In: Microporous and Mesoporous Materials, Vol. 266, 01.08.2018, p. 164-176.

Research output: Contribution to journalArticle

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AU - Fyrillas, M. M.

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