Investigation of Breakthrough Curves of Citric Acid Adsorption

S. A. Ghorbanian, M. Davoudinejad, A. Khakpay and S. Radpour

Abstract
In this paper, experimental breakthrough curves for citric acid adsorption from aqueous solution onto ion-exchange resin at 20, 35, 55 °C have been obtained by some weak and strong basic anionic resins, such as IRA-92, IRA-93, IRA-420 and IRA-458. The results show that amberlite IRA-93 has good performance and is one of the best resins in the process of citric acid recovery from aqueous solution. Also, the temperature effect study shows that an increase in temperature causes an increase in diffusion coefficient of particles, but the saturation capacity of resin decreases. To achieve an appropriate model, three mathematical models were analyzed to predict system properties based on statistical tests, and finally, the appropriate model was determined. To examine model capability, mathematical equations have been implemented in various breakthrough curve data obtained by other investigators, and the results show appropriate conformity.

This work is licensed under a Creative Commons Attribution 4.0 International License

Keywords
adsorption, breakthrough curves, modeling, citric acid