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Original Articles Open Access
An adsorbent prepared from Hibiscus Sabdariffa Stem, by acid treatment was tested for its efficiency in removing copper ion. The process parameters studied include agitation time, initial copper (II) ion concentration, adsorbent dose, pH and temperature. The adsorption followed second order reaction equation and the rate is mainly controlled by intra-particle diffusion. Freundlich and Langmuir isotherm models were applied to the equilibrium data. The adsorption capacity (Qm) obtained from the Langmuir isotherm plot at an initial pH of 6.5 and at 30, 40, 50, 60 ± 0.5 0C. The influence of pH on metal ion removal was significant and the adsorption was increased with increase in temperature. A portion of the Copper (II) ion was recovered from the spent AHSNC using 0.1M HCl.
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Author(s): P Manivannan S Arivoli and S Raja Mohammed
Acid Activated Hibiscus Sabdariffa Stem Nano Carbon (AHSNC), Copper (II) ion, Adsorption isotherm, Equilibrium, Thermodynamic parameters, Intra-particle diffusion, nano carbon