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- Title
Kinetics and thermodynamics characteristics of cationic yellow X-GL adsorption on attapulgite/rice hull-based activated carbon nanocomposites.
- Authors
Liu, Wenjie; Yao, Chao; Wang, Maohua; Ji, Junling; Ying, Lin; Fu, Chengyi
- Abstract
Attapulgite/activated carbon (ATP/AC) nanocomposites were prepared by the calcination of ATP and rice hull. ATP/AC nanocomposites were characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy analysis. The kinetic and thermodynamic parameters of the adsorption of cationic yellow X-GL (CY) in aqueous solution on ATP/AC composites were studied. During all experiments, CY concentration was determined by UV-vis spectrophotometer. Research on the thermodynamic behavior indicated that the adsorption of CY obeyed the Langmuir isotherm model. The adsorption enthalpy was −16.37 kJ/mol, the Gibbs-free energy was −28.73 to −27.04 kJ/mol, and the entropy was about 35 J mol−1 K−1, which showed that the adsorption process was both exothermic and spontaneous. The kinetic parameters showed that absorption of CY on ATP/AC composites was best described by pseudo-second-order kinetics. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 655-662, 2013
- Subjects
BASIC dyes; FULLER'S earth; RICE hull ash; ACTIVATED carbon; SYNTHESIS of Nanocomposite materials; THERMODYNAMICS
- Publication
Environmental Progress & Sustainable Energy, 2013, Vol 32, Issue 3, p655
- ISSN
1944-7442
- Publication type
Article
- DOI
10.1002/ep.11680