Tan, Suat Hian and Nurul Ain, Ismail (2018) Isotherm and Kinetic Studies of L-Phenylalanine Adsorption onto Porous Nanosilica. Materials Today: Proceedings, 5 (1 Part 3). pp. 3193-3201. ISSN 2214-7853. (Published)
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Abstract
Porous nanosilica material was synthesized using tetraethyl orthosilicate as the silica source and ethanol as solvent under basic condition. The product was characterized by a number of techniques, including single point BET nitrogen adsorption, field emission scanning electron microscope (FESEM) and point of zero charge (pHPZC) by mass titration. Results of the studies confirmed the porous structures of the nanoparticles. The adsorption capacity of L-phenylalanine under optimized condition of pH 5.37 with 0.1 mol/L concentrations of L-phenylalanine and 2 hour contact time by using 40 mg of silica nanoparticles is 748.9 μg/g. Equilibrium data were modeled using the Langmuir and the Freundlich isotherms and both models fit well with the experimental data which suggest chemisorption and physisorption reaction. For kinetic studies, the pseudo-second-order equation was the best-fit model for describing the adsorption process.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | L-phenyalanine, adsorption, silica nanoparticle |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics T Technology > T Technology (General) |
| Faculty/Division: | Centre of Excellence: Centre of Excellence for Advanced Research in Fluid Flow Faculty of Chemical & Natural Resources Engineering |
| Depositing User: | Dr. Tan Suat Hian |
| Date Deposited: | 21 Jan 2019 07:22 |
| Last Modified: | 21 Jan 2019 07:22 |
| URI: | http://umpir.ump.edu.my/id/eprint/23737 |
| Download Statistic: | View Download Statistics |
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