Adsorption Of Cu(Ii) And Ni(Ii) Ions Using Chitosan-Benzaldehyde Beads
| dc.contributor.author | Law, Shun Chin | |
| dc.date.accessioned | 2016-12-08T02:18:02Z | |
| dc.date.available | 2016-12-08T02:18:02Z | |
| dc.date.issued | 2016-05 | |
| dc.description.abstract | Two types of chitosan derivatives, chitosan-benzaldehyde 1:1 and 1:2 beads were prepared and used to adsorb Cu2+ and Ni2+ ions from aqueous solution. The beads were characterized using infrared spectroscopy, surface area and pore size analysis and scanning electron microscope coupled with energy dispersive X-ray (SEM-EDX) analysis. The surface charge of the chitosan-benzaldehyde beads was determined by using pHpzc. Batch adsorption studies were carried out to investigate the optimum conditions for the removal of Cu2+ and Ni2+ ions using chitosanbenzaldehye beads for further adsorption studies. Based on thermodynamic studies, the standard enthalpy change (ΔH°) for all the adsorbents were positive indicating an endothermic process. The adsorption of Cu2+ and Ni2+ ions by using chitosanbenzaldehye beads were best described by pseudo-second order kinetic model. The experimental data were best fitted by Freundlich and Redlich-Peterson isotherm model for both chitosan-benzaldehyde 1:1 and 1:2 beads. The maximum adsorption capacity for chitosan-benzaldehyde 1:1 and 1:2 beads were 81.76 and 55.53 mg/g, respectively for Cu2+ ions and 30.34 and 20.42 mg/g respectively for Ni2+ ions. For the fixed-bed column studies, the experimental data is well fitted to the both Thomas and Yoon-Nelson models. The percentage of desorption based on desorption studies are 92.78 % for Cu2+ ions and 85.74 % for Ni2+ ions when chitosan-benzaldehyde 1:1 beads were used while there was 94.54 % for Cu2+ ions and 81.55 % for Ni2+ ions when chitosan-benzaldehyde 1:2 beads were used. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/3263 | |
| dc.subject | The surface charge of the chitosan-benzaldehyde beads | en_US |
| dc.subject | was determined by using pHpzc. | en_US |
| dc.title | Adsorption Of Cu(Ii) And Ni(Ii) Ions Using Chitosan-Benzaldehyde Beads | en_US |
| dc.type | Thesis | en_US |
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