Journal
WATER RESEARCH
Volume 35, Issue 3, Pages 613-618Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0043-1354(00)00307-9
Keywords
kinetic modeling; liquid-phase adsorption; chitosan; reactive dyes; metal ions; complexing agents
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The rates of adsorption of three commercial reactive dyes and Cu(II) from water in the absence and presence of complexing agents using chitosan were measured at 30 degreesC. Three simplified kinetic models, i.e,, pseudo-first-order, pseudo-second-order, and intraparticle diffusion, were tested to investigate the adsorption mechanisms. It was shown that the adsorption of reactive dyes and Cu(II) in the absence of complexing agents could be best described by the intraparticle diffusion model, whereas that of Cu(II) in the absence of complexing agents such as EDTA, citric acid, and tartaric acid by the pseudo-second-order equation. Kinetic parameters of the three models and the normalized standard deviations between the measured and predicted results were also calculated and discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.
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