Abstract
The removal of Methylene Blue (MB) from aqueous solution using activated carbon (AC) has been investigated. Adsorption experiments were conducted and the maximum adsorption capacity was determined. The effect of experimental parameters such as pH, dye concentration and temperature were studied on the adsorption process. Equilibrium data were mathematically modeled using the Langmuir and Freundlich adsorption models to describe the equilibrium isotherms at different dye concentrations and temperature. Parameters of best-fit model were calculated and discussed. To understand the mechanism of adsorption, kinetic models were employed to follow the adsorption processes; the pseudo-first-order best described the adsorption of MB onto AC. It was found that pH plays a major role in the adsorption process; adsorption capacity was influenced by the physical and surface chemical properties of carbon and the pH of the solution. 99.0% MB removal was achieved at equilibrium.
| Original language | English |
|---|---|
| Pages (from-to) | 958-967 |
| Number of pages | 10 |
| Journal | Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering |
| Volume | 45 |
| Issue number | 8 |
| DOIs | |
| State | Published - Jan 2010 |
Bibliographical note
Funding Information:This work was supported by the National Research Foundation (NRF) grant funded by the Korean government (No. 2009-0093-461).
Keywords
- Activated carbon
- Adsorption
- Methylene Blue
- Surface modification