Separation of anthocyanin from roselle extract by cationic nano-rode ZIF-8 constructed using removable template

Anthocyanins are biological antioxidants useful for treatment of cancer, diabetes, cardiovascular and neu-rodegenerative diseases. The point of innovation in the current approach is to study the affinity of super -structured ZIF-8 in separation of anthocyanin from roselle extract. Nano-rode crystalline ZIF-8 was syn-thesized by crystal growth technique in the presence of cellulose fibers as removable templates. ZIF-8 was growth over the fibers-based template to produce C-ZIF-8, M-ZIF-8 and B-ZIF-8.The rode size of the obtained ZIF-8 was dependent on the type of the used fiber template. Langmuir maximum capacity for B-ZIF-8 was reached 517.31 mg/g. The anthocyanin adsorption onto ZIF-8 was carried out physically through deposition within pores and chemically through the electrostatic interaction between ZIF-8 and antho-cyanin. After 5 recycles, the adsorption capacity for B-ZIF-8 was marginally diminished from 466 mg/g to 440 mg/g. In desorption process, 91-99% from the adsorbed anthocyanin was separated from ZIFs-8 within 60 min. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

This study investigates the separation of anthocyanins from roselle extract using super-structured ZIF-8, which shows potential for treating cancer, diabetes, cardiovascular, and neurodegenerative diseases. Nano-rode crystalline ZIF-8 was synthesized using cellulose fibers as templates, and different types of ZIF-8 were obtained. The adsorption of anthocyanins onto ZIF-8 was achieved through physical deposition and chemical interaction. The results demonstrate the promising performance of ZIF-8 in terms of adsorption capacity and recyclability.