期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 58, 期 -, 页码 57-65出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2013.03.037
关键词
Magnetic carboxymethyl chitosan nanoparticles; Bovine serum albumin; Kinetic analyses; Adsorption isotherm; Error analyses
资金
- China State 12th Five-Year Plan scientific and technological support schemes [2012BAK17B06, 2012BAD31B01]
- National Natural Science Foundation of China [31071550, 31171721]
The magnetic carboxymethyl chitosan nanoparticles (MNPs-CMC) were developed as effective magnetic affinity adsorbent for Bovine serum albumin and the adsorption reactions were investigated. The obtained experimental data were compared with the adsorption kinetics models and equilibrium isotherms. The experimental kinetic data were modeled using Pseudo-first order, Pseudo-second order, Bangham's equation, Intra-particle diffusion model and Elovich equations. It was found that the adsorption reactions followed the Pseudo-second order kinetics equation. The experimental isotherm data were analyzed using Langmuir, Freundlich, Dubinin-Radushkevich and Temkin equations. By comparing the correlation coefficients determined for each linear transformation of isotherm analysis, it was found that the Langmuir equation was the best fit equilibrium model for the adsorption of BSA. Error functions have been used to determine the alternative single component parameters by nonlinear regression due to the inherent bias in using the correlation coefficient resulting from linearization. It showed that the Langmuir equation resulted in the lowest values for the error function and thus fitted the data better than the other isotherm. Various thermodynamic parameters such as enthalpy (Delta H degrees), entropy (Delta S degrees) and Gibbs free energy (Delta G degrees) were evaluated. MNPs-CMC nanoaprticles were shown to be a promising material for adsorption of BSA from aqueous solutions. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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