Journal
SUSTAINABLE CHEMISTRY AND PHARMACY
Volume 7, Issue -, Pages 9-16Publisher
ELSEVIER
DOI: 10.1016/j.scp.2017.11.003
Keywords
Adsorption; Chromium(VI); Activated carbon; Apple peels
Categories
Funding
- Laboratory of Physical-Chemistry of Processes and Materials (PCPM), Hassan 1st University, Faculty of Sciences and Technology Settat, Morocco
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In the present study, activated carbon prepared from apple peels (ACAP) was used to remove chromium (VI) from aqueous solution. The characterization of this ACAP has been performed using different analytical techniques such as FTIR and SEM. The adsorption parameters studied were: pH [2- 7], adsorbent dose [0.025-0.15 g/50 mL], initial Cr(VI) concentration [10-50 mg/L] and temperature [10-40 degrees C]. Maximum Cr(VI) adsorption of 36.01 mg/g was achieved using Cr(VI) concentration of 50 mg/L, pH of 2, adsorbent dose of 0.05 g/50 mL, contact time of 4 hand temperature of 28 degrees C. This ACAP gave a Cr(VI) adsorption capacity better than a commercial activated carbon. The experimental data fitted well to Freundlich isotherm (R-2 = 0.99) and kinetics followed the pseudo-second order model. Thermodynamic parameters, Delta G < 0, Delta H degrees = 1.99 (Kcal/mol) and Delta S degrees = 0.0079 (Kcal/K mol) indicate that the adsorption process is spontaneous and endothermic.
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