Adsorption

, Volume 12, Issue 2, pp 155–162

Chromium adsorption in olive stone activated carbon

Authors

  • Milton Rogério Pereira
    • Departamento de Engenharia QuímicaUniversidade Estadual de Maringá
  • Pedro Augusto Arroyo
    • Departamento de Engenharia QuímicaUniversidade Estadual de Maringá
    • Departamento de Engenharia QuímicaUniversidade Estadual de Maringá
  • Viviane Monteiro Sanches
    • Departamento de Engenharia QuímicaUniversidade Estadual de Maringá
  • Edson Antonio da Silva
    • Departamento de Engenharia QuímicaUniversidade do Oeste do Paraná
  • Isabel Maria Fonseca
    • Centro de Química Fina e BiotecnologiaUniversidade Nova de Lisboa
  • Rafael García Lovera
    • Facultad de Ciencias QuímicasUniversidad de Concepción
Article

DOI: 10.1007/s10450-006-0377-z

Cite this article as:
Pereira, M.R., Arroyo, P.A., de Barros, M.A.S.D. et al. Adsorption (2006) 12: 155. doi:10.1007/s10450-006-0377-z

Abstract

In this work, Cr(III) adsorption on activated carbon obtained from olive stones in an upflow fixed-bed column at 30C was studied. The flow rate influence on the breakthrough curves at a feed concentration of 0.87 meq/L was investigated in an attempt to minimize the diffusional resistances. Breakthrough curves for a flow range of 2–8 mL/min were obtained at 10.5 cm bed height and inlet diameter of 0.9 cm. The mass transfer parameters indicated that the bed minimal resistance was attained at 2 mL/min. Therefore, the data equilibrium was carried out until the bed was saturated at 2 mL/min. The dynamic system generated a favorable isotherm with a maximum chromium uptake of 0.45 meq/g. A column sorption mathematical model was created considering the axial dispersion in the column and the intraparticle diffusion rate-controlling steps. The isotherm was successfully modeled by the Langmuir equation and the mathematical model described the experimental dynamic data adequately for feed concentrations from 0.26 to 3.29 meq/L.

Keywords

Chromium Activated carbon Olive stones Adsorption Breakthrough

Copyright information

© Springer Science + Business Media, LLC 2006