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- Title
Adsorption of phenol from aqueous solutions using activated carbon prepared from crofton weed.
- Authors
Chao Hua; Runhu Zhang; Li Li; Xiaoying Zheng
- Abstract
Activated carbon derived from crofton weed (ACCW) was evaluated for its ability to remove phenol from an aqueous solution. The kinetics study, adsorption isotherm, pH effect, and thermodynamic study were examined in batch experiments. Adsorption data for phenol uptake by ACCW were analyzed according to Langmuir, Freundlich and Temkin adsorption models. Thermodynamic parameters for the adsorption system were determined at 293 K, 313 K and 333 K (ΔH° = -22.92 kJ mol-1; ΔG° = -2.87 to -5.28 kJ mol-1 and ΔS° = -60.20 J/K·mol). ΔG° v alues obtained were negative, indicated that the adsorption of the phenol on the surface of ACCW was a spontaneous adsorption process. The kinetics process can be described by a pseudosecond-order rate equation very well. These results show that the ACCW could be c onsidered as a potential adsorbent for phenol in aqueous solutions.
- Subjects
ADSORPTION (Chemistry); PHENOL; AQUEOUS solutions; ACTIVATED carbon; HYDROGEN-ion concentration; THERMODYNAMICS
- Publication
Desalination & Water Treatment, 2012, Vol 37/38, Issue 1-3, p230
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2012.661277