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Equilibrium modeling, kinetic and thermodynamic studies on the adsorption of basic dye by low-cost adsorbent


Citation

Ahmad, A. A. and Idris, Azni and Khalid Mahmoud, Dalia (2011) Equilibrium modeling, kinetic and thermodynamic studies on the adsorption of basic dye by low-cost adsorbent. Journal of Advanced Science and Engineering Research, 1. pp. 261-277. ISSN 2231-8844

Abstract / Synopsis

In this study, the removal of methylene blue (MB) dye from aqueous solutions using low-cost material as adsorbent by a batch system was investigated. Experiments were carried out as a function of contact time, initial concentration (50-300 mg/L), pH (2-12) and temperature (303-323K). The equilibrium adsorption of MB dye on petai (Parkia speciosa) seed adsorbent was analyzed by Langmuir and Freundlich models. The results indicate that the Freundlich model provides the best correlation of the experimental data. The adsorption capacities of the petai seed adsorbent for removal of MB dye was determined with the Langmuir equation and found to be 91.74, 94.34 and 100.03 mg/g at 303, 313, and 323 K, respectively. The kinetic data was found to follow closely the pseudo-second-order model. Various thermodynamic parameters such as enthalpy (ΔH°), entropy (ΔS°) and free energy (ΔG°) were evaluated. The positive value of the enthalpy change (17.89 kJ/mol) indicates that the adsorption is endothermic process. The results indicate that petai seed adsorbent is suitable as adsorbent material for adsorption of MB dye from aqueous solutions.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Publisher: Design for Scientific Renaissance
Keywords: Adsorption; Methyelene blue; Petai (Parkia speciosa) seed; Isotherm; Kinetics; Thermodynamic
Depositing User: Muizzudin Kaspol
Date Deposited: 03 Oct 2014 12:35
Last Modified: 07 Jun 2016 16:59
URI: http://psasir.upm.edu.my/id/eprint/23306
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