Journal
DYES AND PIGMENTS
Volume 72, Issue 1, Pages 130-133Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2005.07.020
Keywords
sorption; safranin; rice husk; equilibrium isotherm; linear method; non-linear method
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Comparison analysis of linear least-square method and non-linear method for estimating the isotherm parameters was made. Comparison analysis was made using the experimental equilibrium data of safranin onto rice husk at a solution temperature of 305 K. Sorption data were fitted to Freundlich, Langmuir and Redlich-Peterson isotherm equations. All the three isotherm equations showed a better fit to the experimental data. The results show that non-linear method could be a better way to obtain the isotherm parameters. Redlich-Peterson isotherm is a special case of Langmuir isotherm when the Redlich-Peterson isotherm constant g was unity. (c) 2005 Elsevier Ltd. All rights reserved.
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