Activated carbon, obtained by phosphoric acid activation of Coffea arabica fruit endocarp, was used to remove 2,4-dichlorophenol from aqueous solutions in a micro-packed bed adsorber. In batch experiments, effects such as initial concentration, solution's pH, and temperature on adsorption were investigated. It was found that acidic pH is favourable and that the adsorption isotherm is best represented by the Langmuir model. In continuous experiments, the effect of inlet concentration, bed length, and flow rate on the adsorption capacity of the micro-packed bed adsorber were evaluated. Adsorption capacities were higher than those obtained in batch experiments. Inlet concentration and bed length show a significant effect on the adsorption capacity. Breakthrough curves were very well fitted by axial dispersion model. Additionally, breakthrough profiles indicate a particle-controlled process, which suggest a negligible external mass transfer resistance.
|Number of pages||17|
|Journal||International Journal of Environmental Technology and Management|
|State||Published - 2019|
Bibliographical noteFunding Information:
The authors wish to thank the Young Researchers and Innovators program ‘Virginia Gutiérrez de Pineda’, COLCIENCIAS (Department of Science, Technology and Innovation), proposal call no. 525-2011, and the Universidad Pontificia Bolivariana for their financial support.
© 2019 Inderscience Enterprises Ltd.
- Activated carbon
- Axial dispersion
- Micro-packed bed