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International Journal of Polymer Science
Volume 2016 (2016), Article ID 1608939, 11 pages
http://dx.doi.org/10.1155/2016/1608939
Research Article

Competitive Fixed-Bed Adsorption of Pb(II), Cu(II), and Ni(II) from Aqueous Solution Using Chitosan-Coated Bentonite

1Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
2Department of Chemical Engineering, University of the Philippines, Diliman, 1101 Quezon City, Philippines
3Environmental Engineering Program, National Graduate School of Engineering, University of Philippines, Diliman, 1101 Quezon City, Philippines
4Environment Business Line, Aecom Philippines Consultants Corporation, 1634 Taguig, Philippines
5Department of Environmental Resources Management, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan

Received 7 March 2016; Revised 6 May 2016; Accepted 25 May 2016

Academic Editor: Adel Mohamed

Copyright © 2016 Wan-Chi Tsai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Fixed-bed adsorption studies using chitosan-coated bentonite (CCB) as adsorbent media were investigated for the simultaneous adsorption of Pb(II), Cu(II), and Ni(II) from a multimetal system. The effects of operational parameters such as bed height, flow rate, and initial concentration on the length of mass transfer zone, breakthrough time, exhaustion time, and adsorption capacity at breakthrough were evaluated. With increasing bed height and decreasing flow rate and initial concentration, the breakthrough and exhaustion time were observed to favorably increase. Moreover, the adsorption capacity at breakthrough was observed to increase with decreasing initial concentration and flow rate and increasing bed height. The maximum adsorption capacity at breakthrough of 13.49 mg/g for Pb(II), 12.14 mg/g for Cu(II), and 10.29 mg/g for Ni(II) was attained at an initial influent concentration of 200 mg/L, bed height of 2.0 cm, and flow rate of 0.4 mL/min. Adsorption data were fitted with Adams-Bohart, Thomas, and Yoon-Nelson models. Experimental breakthrough curves were observed to be in good agreement ( and ) with the predicted curves generated by the kinetic models. This study demonstrates the effectiveness of CCB in the removal of Pb(II), Cu(II), and Ni(II) from a ternary metal solution.