Browsing by Author "Namalike, Mariam"

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    Hydrothermally activated banana peels for adsorption and kinetics studies on malachite green dye
    (Busitema University, 2024) Namalike, Mariam
    In this study, hydrothermally activated banana peels powder was used as an adsorbent for removal of malachite green dye from aqueous solutions. The influence of pH, equilibrium time and initial concentration of malachite green dye on amount of malachite green dye adsorbed were investigated. Studies showed that the amount of malachite green dye increased with increasing bulk solution pH, initial concentration of malachite dye and then decreased with increase in equilibrium time. The experiments showed that the highest removal of malachite green dye was at pH 5, contact time 20 minutes and initial concentration 559mg/L. The experimental data were analyzed using Langmuir and Freundlich adsorption isotherms, pseudo first order and pseudo-second order kinetic models. It was shown that the adsorption of malachite green dye onto hydrothermally activated banana peels powder could be described by the Freundlich adsorption isotherm and pseudo-second order kinetic model, suggesting that the adsorption process is presumable a physisorption