Cadmium(II) removal from aqueous solution using microporous titanosilicate ETS-10
authors Camarinha, ED; Lito, PF; Antunes, BM; Otero, M; Lin, Z; Rocha, J; Pereira, E; Duarte, AC; Silva, CM
nationality International
journal CHEMICAL ENGINEERING JOURNAL
author keywords Cadmium; ETS-10; Ion exchange; Kinetic; Isotherm; Nernst-Planck
keywords HEAVY-METAL IONS; MAXWELL-STEFAN APPROACH; LENGTH-COLUMN METHOD; FIXED-BED COLUMN; MASS-TRANSFER; WASTE-WATER; DIFFUSION-COEFFICIENTS; MERCURY REMOVAL; KINETIC-MODELS; ZEOLITE-A
abstract In this work, the removal of Cd(2+) ions from aqueous solution using microporous titanosilicate ETS-10 was investigated in order to assess its potential as decontaminating agent in tertiary treatments. Accordingly, batch stirred tank experiments were carried out to study the ion exchange kinetics and equilibrium. Results show that pH affects considerably the ion exchange capability of ETS-10: at pH 4 it is 1.567 x 10(2) eq m(-3), at pH 6 it is 3.629 x 10(3), and no further increment was observed at pH 8. This is an extremely important observation since pH of industrial effluents and other wastewaters rounds 6. Both Langmuir and Langmuir-Freundlich isotherms were fitted to the experimental data measured. The second model performs slightly better as the calculated absolute average deviations show: AAD(L) = 2.94% and AAD(LF) = 2.40%. Concerning the kinetic behavior, the ion exchange was successfully represented by a Nernst-Planck based model (AAD = 11.9%). (C) 2009 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 1385-8947
year published 2009
volume 155
issue 1-2
beginning page 108
ending page 114
digital object identifier (doi) 10.1016/j.cej.2009.07.015
web of science category Engineering, Environmental; Engineering, Chemical
subject category Engineering
unique article identifier WOS:000274769500014
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journal impact factor 10.652
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