Browsing by Author "Olatunji, Gabriel Ademola"

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    Adsorption of p-Phenylenediamine onto Activated Carbon Prepared from Jatropha curcas and Terminalia catappa Seed Coats
    (2016) Saheed, Ismaila Olalekan; Adekola, Folahan Amoo; Olatunji, Gabriel Ademola
    This research work is concerned with the applicability of sodium hydroxide-activated carbon prepared from Jatropha curcas seed coats and Terminalia catappa seed coats in the removal of p-phenylenediamine (PPD), a component of hair dye industrial effluent. The surface characteristics of the prepared activated carbons were examined using Scanning Electron Microscopy (SEM), Brunauer- Emmett-Teller (BET) surface area analysis and Fourier Transform Infrared Spectroscopy (FTIR). The influence of various factors such as initial concentration, pH, contact time, adsorbent dose and temperature were studied and the p-phenylenediamine adsorption capacity was found to be 32.4 mg/g and 45.5 mg/g for Jatropha activated carbon (JAC) and Terminalia activated carbon (TAC), respectively. The experimental data were analysed using Langmuir, Freundlich and Dubinin-Radushkevich isotherms. The data could be fitted successfully for both systems by the Langmuir and Freundlich isotherms. The data show also that the sorption process is exothermic and that it follows pseudo second order kinetics.
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    Sorption Study of Methylene Blue on Activated Carbon Prepared from Jatropha curcas and Terminalia catappa Seed Coats
    (2017) Saheed, Ismaila Olalekan; Adekola, Folahan Amoo; Olatunji, Gabriel Ademola
    This research work targets the effectiveness of the prepared activated carbon from Jatropha curcas and Terminalia catappa seed coats for adsorption of methylene blue (MB) from aqueous solution. The prepared Jatropha activated carbon (JAC) and Terminalia activated carbon (TAC) were characterised using Fourier Transform Infrared Spectroscopy (FTIR), Scanning electron microscopy (SEM), and Brunauer- Emmett-Teller (BET) surface area analysis. Effects of initial concentration, pH, contact time, adsorbent dose and temperature on the adsorption experiments were studied and the concentration of methylene blue was monitored using spectrophotometry. The adsorption capacities of these adsorbents were found to be 37.84 mg/g and 17.44 mg/g for methylene blue uptake by JAC and TAC, respectively. The experimental data were analysed using Langmuir, Freundlich, and Dubinin-Radushkevich isotherms. The data fitted best into Langmuir isotherm for Methylene blue-JAC and Methylene blue-TAC systems. The kinetic studies fitted into pseudo second order kinetics model. The process chemistry was exothermic.