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Vol. 25 No. 15 (2013): Vol 25 Issue 15

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Kinetic and Thermodynamic Studies for Methylene Blue Adsorption using Activated Carbon Prepared from Agricultural and Municipal Solid Wastes

https://doi.org/10.14233/ajchem.2013.14723
Zeid Abdullah Al-Othman
Advanced Materials Research Chair to Affliction, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
Mohamed Abdelaty Habila
Advanced Materials Research Chair to Affliction, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
Rahmat Ali
Advanced Materials Research Chair to Affliction, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabi
Mohamed Salah El-Din Hassouna
Department of Environmental Studies, Institute of Graduate Studies and Research, Alexandria University, 163 El-Horreya Avenue, P.O. Box 832, Alexandria, Egypt

Corresponding Author(s) : Mohamed Abdelaty Habila

mhabila@ksu.edu.sa

Asian Journal of Chemistry, Vol. 25 No. 15 (2013): Vol 25 Issue 15

Abstract

This study aimed to evaluate and optimize the removal of methylene blue onto low cost starting material activated carbon. The effects of pH, contact time, initial concentration on adsorption process were investigated. Results showed that effective adsorption was occurred in the pH range of 5-12. The maximum adsorption capacity (140.03 mg/g) was obtained at contact time 480 min, at initial methylene blue concentration of 150 ppm. Adsorption kinetics of methylene blue was analyzed by pseudo first order, pseudo second order and intraparticle diffusion models. Results showed that methylene blue adsorption onto activated carbon followed second order kinetics models most appropriately. Thermodynamic parameters; DGº, DHº and DSº indicate that the sorption process was spontaneous and endothermic in nature. The magnitude of DGº was -6.27 to -12 kJ/mol, the standard enthalpy and the entropy values in the range of 25-50 ºC were obtained as 44.13 kJ mol-1 and 158.3 kJ mol-1 K-1.

Keywords

Copyrolysis Municipal solid waste Chemical activation Activated carbon Adsorption Kinetic models
Abdullah Al-Othman, Z., Abdelaty Habila, M., Ali, R., & Salah El-Din Hassouna, M. (2013). Kinetic and Thermodynamic Studies for Methylene Blue Adsorption using Activated Carbon Prepared from Agricultural and Municipal Solid Wastes. Asian Journal of Chemistry, 25(15), 8301–8306. https://doi.org/10.14233/ajchem.2013.14723
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