University Links: Home Page | Site Map
Covenant University Repository

Decaffeination of wastewater using activated carbon produced from velvet tamarind-pericarp (Dialium Guineense)

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).

[img] HTML
Download (68kB)


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

Actions (login required)

View Item View Item