Pb(II) and Cu(II) Sorption from Aqueous Solutions Using Activated Red Mud – Evaluation of Kinetic, Equilibrium, and Thermodynamic Models
Veselinka V. Grudić1, Đina Perić2, Nada Z. Blagojević1, Vesna L. Vukašinović-Pešić1, Snežana Brašanac1, Bojana Mugoša2
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1Faculty of Metallurgy and Technology, Cetinjski put bb, 20000 Podgorica, Montenegro
2Institute of Public Health of Montenegro, Ljubljanska bb, 20000 Podgorica, Montenegro
Pol. J. Environ. Stud. 2013;22(2):377-385
We investigated the influence of contact time, sorbent dose, and initial Cu(II) or Pb(II) concentrations on the removal of Cu(II) and Pb(II) from aqueous solution by the batch sorption technique using activated red mud (aBauxsol) as a low-cost sorbent. Sorption equilibrium was achieved after 1 h at pH 5.5 for both ions. Pseudo first and pseudo second order models were used for analyzing the kinetics of sorption processes. The rate of both sorption processes is controlled by diffusion in the film fluid and diffusion within particles. The processes of sorption follow the Langmuir model.
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