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- Publisher
- Wiley
- Copyright
- 2006 Geological Society of China
- ISSN
- 1000-9515
- eISSN
- 1755-6724
- DOI
- 10.1111/j.1755-6724.2006.tb00236.x
- Publisher site
- See Article on Publisher Site
Abstract
Abstract The adsorption kinetics of methylene blue from aqueous solutions on purified palygorskite was investigated. The kinetics data related to the adsorption of methylene blue from aqueous solutions are in good agreement with the pseudo‐second order equation in ranges of initial concentration of 120–210 mg/L, oscillation speed of 100–200 r/min and temperature of 298–328K. The experimental results show that methylene blue is only adsorbed onto the external surface of purified palygorskite, and the apparent adsorption activation energy is 13.92 kJ/mol. The relatively low apparent adsorption activation energy suggests that the adsorption of methylene blue involves in not only a chemical, but also a physical adsorption process, and it is controlled by the combination of chemical adsorption and liquid‐film diffusion.
Journal
Acta Geologica Sinica (English Edition) – Wiley
Published: Apr 1, 2006