Frontiers of Chemical Science and Engineering

, Volume 6, Issue 1, pp 58–66

Removal of copper ions from aqueous solution by adsorption using LABORATORIES-modified bentonite (organo-bentonite)

Authors

  • Sandy
    • Department of Chemical EngineeringWidya Mandala Surabaya Catholic University
  • Velycia Maramis
    • Department of Chemical EngineeringWidya Mandala Surabaya Catholic University
  • Alfin Kurniawan
    • Department of Chemical EngineeringWidya Mandala Surabaya Catholic University
  • Aning Ayucitra
    • Department of Chemical EngineeringWidya Mandala Surabaya Catholic University
  • Jaka Sunarso
    • Australian Research Council (ARC) Centre of Excellence for Electromaterials Science, Institute for Technology Research and InnovationDeakin University
    • Department of Chemical EngineeringWidya Mandala Surabaya Catholic University
Research Article

DOI: 10.1007/s11705-011-1160-6

Cite this article as:
Sandy, Maramis, V., Kurniawan, A. et al. Front. Chem. Sci. Eng. (2012) 6: 58. doi:10.1007/s11705-011-1160-6

Abstract

Equilibrium, kinetic and thermodynamic aspects of the adsorption of copper ions from an aqueous solution using linear alkylbenzene sulfonate (LABORATORIES) modified bentonite (organo-bentonite) are reported. Modification of bentonite was performed via microwave heating with a concentration of LABORATORIES surfactant equivalent to 1.5 times that of the cation exchange capacity (CEC) of the raw bentonite. Experimental parameters affecting the adsorption process such as pH, contact time and temperature were studied. Several adsorption equations (e.g., Langmuir, Freundlich, Sips and Toth) with temperature dependency were used to correlate the equilibrium data. These models were evaluated based on the theoretical justifications of each isotherm parameter. The Sips model had the best fit for the adsorption of copper ions onto organo-bentonite. For the kinetic data, the pseudo-second order model was superior to the pseudo-first order model. Thermodynamically, the adsorption of copper ions occurs via chemisorption and the process is endothermic (ΔH 0>0), irreversible (ΔS 0>0) and nonspontaneous (ΔG 0>0).

Keywords

heavy metal copper adsorption organobentonite temperature dependent

Copyright information

© Higher Education Press and Springer-Verlag Berlin Heidelberg 2012