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Adsorption equilibrium and kinetics of copper ions and phenol onto modified adsorbents

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Abstract

The adsorption equilibrium and kinetics of single and binary component copper ions and phenol onto powdered activated carbon (PAC), alginate beads and alginate-activated carbon beads (AAC) were studied. Adsorption equilibrium data for single component copper ions and phenol onto the adsorbents could be represented by the Langmuir equation. Multicomponent equilibrium data were correlated by the extended Langmuir and ideal adsorbed solution theory (IAST). The IAST gave the best fit to our data. The amount of copper ions adsorbed onto the AAC beads in the binary component was greater than that of phenol. The internal diffusion coefficients were determined by comparing the experimental concentration curves with those predicted from surface diffusion and pore diffusion model.

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Abbreviations

A S :

surface area of adsorbent (m2/g)

C i :

initial concentration of bulk fluid (mol/m3)

C e :

saturation concentration of the adsorbate in the liquid phase (mol/m3)

d P :

particle diameter (m)

D P :

pore diffusion coefficient (m2/s)

D S :

surface diffusion coefficient (m2/s)

k f :

film mass transfer coefficient (m/s)

k F :

isotherm parameter (mol/kg)(mol/m3)−1/n

k L :

isotherm parameter (m3/mol)

k S :

isotherm parameter (mol/m3)−1/n

N A :

rate of mass transfer of adsobates to the external surface of the adsorbent (mol/s)

N :

number of component

q :

equilibrium amount adsorbed on the adsorbent (mol/kg)

q m :

maximum adsorption capacity of adsorbent (mol/kg)

R P :

particle radius (m)

V :

volume of solution (m3)

W :

weight of adsorbent (kg)

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Authors and Affiliations

  1. Department of Environmental Engineering, Chonnam National University, Gwangju, 500-757, Korea

    Tae Young Kim, Sung Young Cho & Seung Jai Kim

  2. Environmental Research Institute, Chonnam National University, Gwangju, 500-757, Korea

    Seung Jai Kim

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  1. Tae Young Kim
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  2. Sung Young Cho
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Correspondence to Tae Young Kim.

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Kim, T.Y., Cho, S.Y. & Kim, S.J. Adsorption equilibrium and kinetics of copper ions and phenol onto modified adsorbents. Adsorption 17, 135–143 (2011). https://doi.org/10.1007/s10450-010-9306-2

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  • DOI: https://doi.org/10.1007/s10450-010-9306-2

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