Oni, Babalola Aisosa and Sanni, Samuel Eshorame and Dahunsi, S. O. (2022) Decaffeination of wastewater using activated carbon produced from velvet tamarind-pericarp (Dialium Guineense). International Journal of Phytoremediation, 24 (4).
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Abstract
Adsorption of caffeine from an aqueous solution was carried out using Velvet Tamarind- Pericarp, activated with H3PO4. The adsorbent was characterized using a scanningelectron microscope and the Brunauer-Emmett-Teller. Parameters such as activating agent concentration (80 wt.% in 100 mL solution), initial caffeine concentration of 5−40 g/L, pH of 0−14, and residence time 0−90 minutes, were investigated. Improved adsorptive capacities were seen at in creased acid concentrations, with the highest removal rate obtained at a pH of 6. The highest residence time and adsorbent concentrations were obtained at 40 min and 10 g/L. The surface adsorption of the adsorbent obeyed the Langmuir Isotherm, while the regression coefficients conformed to the pseudo-second-order kinetic model for the remediation of caffeine with DG-AC. The highest amount of caffeine removed per gram DG is 72.60 mg.g−1. From the thermodynamic study, the caffeine adsorption was feasible, spontaneous, entropydriven, and endothermic. These data show that the use of DG-AC can be a good alternative to other expensive methods for caffeine remediation. The Pseudo – first/second-order kinetic results gave R2 values of 0.95 and 0.99, other parameters.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Caffeine velvet tamarind wastewater adsorption activated carbon contaminantsCited |
| Subjects: | T Technology > T Technology (General) T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | nwokealisi |
| Date Deposited: | 30 Nov 2023 16:03 |
| Last Modified: | 30 Nov 2023 16:03 |
| URI: | http://eprints.covenantuniversity.edu.ng/id/eprint/17660 |
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