Jinnah, Siti Nor Halimah Mohd Ali and Md Ali, Umi Fazara and Gopinath, Subash C. B. and Ibrahim, Naimah and Ahmad, Razi and Zuki, Fathiah Mohamed (2024) Oil palm waste-derived reduced graphene oxide (rGO) for dynamic adsorption of dye in a fixed-bed system. Desalination and Water Treatment, 317. p. 100019. ISSN 1944-3994, DOI https://doi.org/10.1016/j.dwt.2024.100019.
Full text not available from this repository.Abstract
This study focuses on investigating the dynamic adsorption of Rhodamine B (RhB) from reduced graphene oxide (rGO) derived from oil palm waste. The synthesis of rGO from palm kernel shell (PKS) was achieved through double oxidation and carbonization method, resulting in a yield of 73.5 wt%. The reduction of oxygen-containing functionalities process using PKS was confirmed by FTIR spectroscopy, microscopic evaluation, and Xray diffraction analyses. Laboratory-scale fixed-bed experiments were conducted with various process parameters. Both PKS and rGO were used as adsorbents, and a comparison was made based on breakthrough curve analysis, adsorption capacity and percentage removal of dye. The adsorption kinetics of RhB on PKS and rGO were best described by the non-linear Yoon-Nelson model, with a high adsorption capacity of 88.32 mg/g and 195.24 mg/g respectively. Using both PKS and rGO, the maximum adsorption capacity was observed when using 10 cm bed depth column, inlet dye concentration of 5 mg/L, flow rate of 12 mL/min and pH of 7. PKS exhibited good dye removal with an efficiency of 66.54%. Meanwhile, the exothermic behavior highlighted the potential of utilizing rGO for maximum dye removal, achieving an efficiency of 90.35%. This study justifies rGO as a costeffective superior dye removal adsorbent, providing new prospect for large-scale dye removal.
| Item Type: | Article |
|---|---|
| Funders: | Women In Science (FWIS) (9008-00018) |
| Uncontrolled Keywords: | Rhodamine B; Palm Kernel Shell; Reduced Graphene Oxide; Dynamic Adsorption; Fixed Bed System |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering > Department of Chemical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 20 Jan 2025 04:58 |
| Last Modified: | 20 Jan 2025 04:58 |
| URI: | http://eprints.um.edu.my/id/eprint/47616 |
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