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In relation to this article, we declare that there is no conflict of interest.
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Received July 9, 2013
Accepted December 16, 2013
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Optimization of parameters for competitive adsorption of heavy metal ions (Pb+2, Ni+2, Cd+2) onto activated carbon

Department of Chemical Engineering, AmirKabir University of Technology, No. 424, Hafez Ave., P. O. Box 15875-4413, Tehran, Iran
Korean Journal of Chemical Engineering, April 2014, 31(4), 692-700(9), 10.1007/s11814-013-0280-8
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Abstract

This study investigates optimization of various competitive adsorption parameters for removal of Cd(II), Ni(II) and Pb(II) from aqueous solutions by commercial activated carbon (AC) using the Taguchi method. Adsorption parameters such as initial metal concentration of each metal ion (C0, i), initial pH (pH0), adsorbent dosage (m) and contact time (t) in batch technique were studied to observe their effects on the total adsorption capacity of metals onto activated carbon (qtot). The adsorbent dosage has been found to be the most significant parameter. Interactions between C0, Cd× C0, Ni, C0, Cd×C0, Pb and C0, Ni×C0, Pb have been considered for simultaneous metal ions adsorption. The optimum condition for adsorption of metal ions were obtained with C0, i=100 mg L^(-1), pH0=7, m=2 g L^(-1) and t=80min. Finally, experimental results showed that a multi-staged adsorptive treatment would be necessary to reach the minimal discharge standards of metal ions in the effluent.

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