Abstract
The adsorption of two commercial dyes and phenol from water on activated carbons was investigated at 30°C. The carbons were prepared from bagasses and were activated by steam with different extents of burn-off by varying the temperature in the range of 750-840°C. Pore structures of the carbons were characterized by the t-plot method based on N2 adsorption isotherms. Three simplified models including the pseudo-first-order equation, pseudo-second-order equation, and intraparticle diffusion models were used to test the adsorption kinetics. It was shown that the adsorption of dyes could be best fitted by the intraparticle diffusion model; the kinetic parameter was calculated and correlated with the extent of burn-off of the carbons. Neither of the three models had a preference for describing the adsorption of phenol, presumably due to its combined control of chemisorption and intraparticle diffusion.
| Original language | English |
|---|---|
| Pages (from-to) | 191-199 |
| Number of pages | 9 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 201 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - 05 03 2002 |
| Externally published | Yes |
Keywords
- Activated carbon
- Adsorption kinetics
- Bagasse
- Characterization
- Dyes
- Phenol