| Author's Name: |
K. Shahul Hameed, S. Sivakumar & R. Satheesh Kannan |
| Subject Area: |
Science and Engineering |
| Subject |
Chemistry |
| Section |
Research Paper |
Keyword:
Commercial Activated Carbon (CAC), kaolin, Coomassie brilliant blue, Adsorption isotherm.
Abstract
Batch mode adsorption of Coomassie brilliant blue dye on Commercial Activated Carbon and kaolin were carried out with various experiment parameters like initial concentration, contact time, dose and pH. Adsorption isotherm models like Langmuir and Freundlich were applied to test the equilibrium data. Both isotherms are well fitted. The monolayer adsorption capacities were found to be 73.62 mg g-1for commercial activated carbon and 41.31 mg g-1 for kaolin. The separation factors RL were found to be 0.1838 for kaolin and 0.1879 for commercial activated carbon, indicating favorable adsorption. Various kinetic equations like Natarajan – Khalaf , Lagergren and Bhattacharya – Venkobachar were tested for kinetic study. Intra particle diffusion model showed boundary layer effect and larger intercepts indicate greater surface adsorption. The percentage removal of dye Coomassie brilliant blue decreases with increases in pH. The adsorption maximum was observed at pH 5.