شماره ركورد كنفرانس :
4518
عنوان مقاله :
Hexavalent Chromium Removal from Aqueous Solution by Adsorption on Multiwalled Carbon Nanotunes: Equilibrium and Thermodynamic Studies
Author/Authors :
M. Gholipour Kerman, Shahid Bahonar University, Chemical Engineering Faculty , H. Hashemipour Kerman, Shahid Bahonar University, Chemical Engineering Faculty , A. Soltani Goharrizi Kerman, Shahid Bahonar University, Chemical Engineering Faculty
كليدواژه :
Hexavalent Chromium , Adsorption , Multiwalled Carbon Nanotubes , Adsorption Isotherm , Thermodynamic Parameters
عنوان كنفرانس :
The 7th International Chemical Engineering Congress & Exhibition (IChEC 2011
چكيده لاتين :
The presence of hexavalent chromium and its derivatives in waters and wastewaters is a potential
hazard to aquatic animals and humans. Therefore, It is essential to remove these components from
wastewaters before disposal. In this paper, the batch removal of hexavalent chromium (Cr(VI))
from aqueous solution using multiwalled carbon nanotubes (MWCNTs) was studied. The batch
experiments were conducted at 3 different temperatures (17, 27 and 37°C) and the influence of
adsorbent dosage, initial solution pH, initial Cr concentration, contact time and temperature was
investigated. The sorption data fitted well with BET isotherm model. Thermodynamic parameters
such as Gibbs free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) for Cr(VI) adsorption were
also estimated and Results suggest that the adsorption process is a spontaneous and endothermic
