Adsorption Isotherms and Thermodynamics Studies for the Removal Methyl Orange from Wastewaters Using Multiwalled Carbon Nanotubes

作者：Zhao Donglin^*; Ding Yi; Chen Shaohua; Wang Manli; Zhang Xianglu

来源：Asian Journal of Chemistry, 2014, 26(5): 1440-1442.

DOI：10.14233/ajchem.2014.17254

• Adsorption
• Carbon nanotube
• Methyl orange
• Thermodynamics

In this study, the adsorption of methyl orange on multiwalled carbon nanotubes from aqueous solutions was investigated in a batch stirred cell. The equilibrium adsorption data were analyzed using two common adsorption models: Langmuir and Freundlich. The results showed that Langmuir isotherm fit the experimental results well. Different thermodynamic parameters like enthalpy (Delta H degrees), Gibb's free energy (Delta G degrees) and entropy (Delta S degrees) of the undergoing process were also evaluated through two adsorption models. The thermodynamic parameters (Delta H degrees, Delta S degrees and Delta G degrees) calculated from the temperature dependent adsorption isotherms indicated that the adsorption process of methyl orange on multiwalled carbon nanotubes was endothermic and spontaneous.

• 出版日期2014-3