Journal
DESALINATION AND WATER TREATMENT
Volume 53, Issue 13, Pages 3681-3690Publisher
DESALINATION PUBL
DOI: 10.1080/19443994.2013.873881
Keywords
Kinetics; Dye; Thermodynamics; Adsorption; Camellia seed powder
Categories
Funding
- Major Science & Technology Program for Water Pollution Control and Treatment [2010ZX07320-002]
- Open Research Fund Program of Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture [YH201101003]
- Importation & Development of High-Caliber Talents Project of Beijing Municipal Institutions
- Beijing Natural Science Foundation Program
- Scientific Research Key Program of Beijing Municipal Commission of Education
- Training Program foundation for the Beijing Municipal Excellent Talents
Ask authors/readers for more resources
Adsorption of methylene blue (MB) and methyl violet (MV) onto camellia seed powder (CSP) was conducted, and the equilibrium data were fitted with Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models to describe the equilibrium isotherms. The kinetics rates were modeled using pseudo-first-order, pseudo-second-order kinetic equations, and intra-particle diffusion model. The results revealed that adsorption of MB and MV onto CSP was affected slightly by the pH value, and the maximum adsorption amount was achieved at the pH of 5.5, the unadjusted value. For MB, the adsorption process could be depicted primly by Langmuir function, while for MV, the equilibrium data agree well with all of the Langmuir, Freundlich, and D-R models. The Gibbs free energy (Delta G(0)), enthalpy change (Delta H-0), and entropy change (Delta S-0) for MB were all below zero, which indicated the adsorption was spontaneous and exothermic process; while for MV, the negative Delta G(0) value and positive Delta H-0 value imply that its adsorption process is spontaneous and endothermic. For both MB and MV, the kinetics data were better fitted with the pseudo-second-order kinetic model and the intra-particle diffusion controls the adsorption rate.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available