Skip to main content
Log in

Structural and thermodynamic factors in the adsorption process of anthocyanins from eggplant peel onto a carbon adsorbent

  • Original Paper
  • Published:
Chemical Papers Aims and scope Submit manuscript


A simple method for the recovery of anthocyanins from eggplant peel by adsorption has been developed. Anthocyanins were extracted from eggplant peel and adsorbed onto three carbon adsorbents with different structures (C1, C2 and C3). The effects of the carbon pore size on the adsorption capacity were investigated. It was found that the size exclusion influenced the adsorption process. C1 had the best adsorption capability for eggplant peel anthocyanins due to its large pore size and high mesoporous volume and was used to purify eggplant peel anthocyanins. An equilibrium experiment showed that the isotherms of anthocyanins on C1 can be fitted well by Langmuir adsorption models. The kinetic rate was modeled using a pseudo-second-order model. Packed column experiments showed that the breakthrough point occurs when the load of the extract reached 16 bed volumes. The desorption was completely achieved with 5 bed volumes of 60% ethanol. The content of eggplant peel anthocyanin in the pigment product was 4.1% after one treatment. The findings indicate that carbon adsorbent with appropriate pore size and high mesoporous volume can be applied in the separation of anthocyanins from an aqueous solution.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

Similar content being viewed by others


Download references


This work was supported by the Natural Science Foundation of China (No. 51772031).

Author information

Authors and Affiliations


Corresponding author

Correspondence to Wei Wei.

Ethics declarations

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Yang, Q., Wang, C., Zhao, Z. et al. Structural and thermodynamic factors in the adsorption process of anthocyanins from eggplant peel onto a carbon adsorbent. Chem. Pap. 75, 5687–5694 (2021).

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: