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Title: | Removal of reactive green 19 dye using chitosan beads |
Authors: | Liaw, Lee Teng Masitah Hasan |
Keywords: | Reactive green 19 (RG19) Chitosan beads Shrimp shell Wastewater pollutions Textile industry |
Issue Date: | May-2010 |
Publisher: | Universiti Malaysia Perlis (UniMAP) |
Abstract: | The adsorption of reactive green 19 (RG19) on chitosan beads was studied in batch system. Various experimental parameters were studied, including initial dye concentration (50 - 500 mg/L), contact time, pH of solution (2 - 13) and temperature (25 - 50 °C). The experimental data were analyzed using Langmuir and Freundlich isotherm model. The result showed a better fit to the Langmuir isotherm model, claiming a homogeneous surface of chitosan beads produced. Pseudo-first-order, pseudo-second-order kinetic were used to analyze the kinetic data. It was found that the kinetic data fitted well with the pseudo-second-order kinetic model, which suggest that the adsorption is controlled by the chemisorptions process. Thermodynamic studies were carried out and various thermodynamic parameters, such as Gibbs energy (ΔG°), entalphy change (ΔH°), entrophy change (ΔS°) and activation energy (Ea) were calculated. The results reveal that RG19 has a good affinity towards chitosan beads and the adsorption process was spontaneous and endothermic. Since the low value of Ea and ∆G° indicates that process is more towards physisorption mechanism, it is concluded that the adsorption of RG19 onto chitosan beads are taking the combination route of physical and chemisorptions. |
Description: | Access is limited to UniMAP community. |
URI: | http://dspace.unimap.edu.my/123456789/19579 |
Appears in Collections: | School of Environmental Engineering (FYP) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Abstract, Acknowledgement.pdf | 370.18 kB | Adobe PDF | View/Open | |
Conclusion.pdf | 212.81 kB | Adobe PDF | View/Open | |
Introduction.pdf | 159.54 kB | Adobe PDF | View/Open | |
Literature review.pdf | 566.06 kB | Adobe PDF | View/Open | |
Methodology.pdf | 429.36 kB | Adobe PDF | View/Open | |
Reference and appendix.pdf | 577.99 kB | Adobe PDF | View/Open | |
Results and discussion.pdf | 713.46 kB | Adobe PDF | View/Open |
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