| Literature DB >> 21620692 |
Mohd Shaiful Sajab1, Chin Hua Chia, Sarani Zakaria, Saad Mohd Jani, Mohd Khan Ayob, Kah Leong Chee, Poi Sim Khiew, Wee Siong Chiu.
Abstract
Chemically modified kenaf core fibres were prepared via esterification in the presence of citric acid (CA). The adsorption kinetics and isotherm studies were carried out under different conditions to examine the adsorption efficiency of CA-treated kenaf core fibres towards methylene blue (MB). The adsorption capacity of the kenaf core fibres increased significantly after the citric acid treatment. The values of the correlation coefficients indicated that the Langmuir isotherm fitted the experimental data better than the Freundlich isotherm. The maximum adsorption capacity of the CA-treated kenaf core fibres was found to be 131.6mg/g at 60°C. Kinetic models, pseudo-first-order, pseudo-second-order and intraparticle diffusion, were employed to describe the adsorption mechanism. The kinetic data were found to fit pseudo-second-order model equation as compared to pseudo-first-order model. The adsorption of MB onto the CA-treated kenaf core fibres was spontaneous and endothermic.Entities:
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Year: 2011 PMID： 21620692 DOI： 10.1016/j.biortech.2011.05.011
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642