Abstract
Comparisons of protocatechuic acid (PA) and caffeic acid (CA) adsorption isotherm on C 18 column and competitive adsorption of the two compounds were investigated. By linear and nonlinear regression analysis, the experimental parameters in the equilibrium isotherms were estimated. Adsorption equilibrium data of the two compounds were investigated using six different models including linear, Langmuir, Freundlich, Langmuir-Freundlich, competitive Langmuir and Quadratic. In the moderate range of concentrations, the competitive Langmuir isotherm proved to be the best model for these experimental data. The regression coefficients of the competitive Langmuir adsorption isotherms were 0. 9860 for PA and 0. 9898 for CA, respectively. The coefficients obtained for the six isotherm models confirmed the superiority of the competitive Langmuir isotherm for analyzing the competitive adsorption data of solutes.
| Original language | English |
|---|---|
| Pages (from-to) | 135-138 |
| Number of pages | 4 |
| Journal | Korean Journal of Chemical Engineering |
| Volume | 29 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2012 |
Bibliographical note
Funding Information:This research was supported by Basic Science Research Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science and Technology (2011-0002642).
Keywords
- Adsorption Isotherm
- Caffeic Acid
- Competitive Adsorption
- Protocatechuic Acid