Effect of Apricot Stone Activated Carbon Adsorbent on the Removal of Toxic Heavy Metals Ions from Aqueous Solutions
International Journal of Ecotoxicology and Ecobiology
Volume 3, Issue 2, June 2018, Pages: 51-62
Received: May 29, 2018;
Accepted: Jun. 25, 2018;
Published: Aug. 1, 2018
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Abeer El-Saharty, Marine Chemistry Department, National institute of Oceanography and Fisheries, Alexandria, Egypt
Shaimaa Nasser Mahmoud, Department of Chemistry, Faculty of Science, Monofiya University, Monofiya, Egypt
Ahmed Hashem Manjood, Department of Chemistry, Faculty of Science, Monofiya University, Monofiya, Egypt
Adel Abdel Hady Nassar, Marine Chemistry Department, National institute of Oceanography and Fisheries, Alexandria, Egypt
Abdel Moneum Ahmed, Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt
In this work, activated carbon was prepared from apricot stone (ASAC) waste to remove the toxic heavy metal ions (Aluminum ions and zinc ions) from aqueous solutions. The effect of different parameters such as PHs, adsorbent dose, the initial heavy metal ions concentration and contact time were investigated. Adsorption isotherm, kinetics and thermodynamics of metal ions on ASAC were studied. Equilibrium data were fitted to the Langmuir and Freundlich isotherm models. Langmuir isotherm provided the best fit to the equilibrium data with maximum adsorption capacity. Kinetic studies were also undertaken in terms of pseudo-first-order and pseudo-second-order kinetic models for heavy metal ions on ASAC. The adsorption process follows the pseudo- second order kinetic with high coefficients correlation. The thermodynamic parameters ∆G°, ∆H° and ∆S° determined, showed that the adsorption of heavy metal ions onto ASAC was feasible, spontaneous and endothermic. The results showed that ASAC is an efficient adsorbent for the adsorptive removal of heavy metal ions from aqueous solutions.
Shaimaa Nasser Mahmoud,
Ahmed Hashem Manjood,
Adel Abdel Hady Nassar,
Abdel Moneum Ahmed,
Effect of Apricot Stone Activated Carbon Adsorbent on the Removal of Toxic Heavy Metals Ions from Aqueous Solutions, International Journal of Ecotoxicology and Ecobiology.
Vol. 3, No. 2,
2018, pp. 51-62.
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