The Adsorption of Full-Fat Almarei Milk Solution Produced in Saudi Arabia on the Surface of Flavylium Cations of Anthocyanins from Grape Peel, Red Cabbage, and Pomegranate Peel as Natural Adsorbents | [Journal of Chemical Society of Pakistan • 2022]

Author(s):

1. Fatima A. Al-Qadri: Department of Chemistry of Sharourah's Science and Art faculty, Najran University, Saudi Arabia

2. Raiedhah Alsaiari: Department of Chemistry of Sharourah's Science and Art faculty, Najran University, Saudi Arabia

3. Mabkhoot Alsaiari: Department of Chemistry of Sharourah's Science and Art faculty, Najran University, Saudi Arabia

4. Iman Mohammad Shedaiwa: Department of Chemistry of Sharourah's Science and Art faculty, Najran University, Saudi Arabia

5. Mervate Mohamed Mohamed: Department of Chemistry of Sharourah's Science and Art faculty, Najran University, Saudi Arabia

6. Esraa Mohamed Musa: Department of Chemistry of Sharourah's Science and Art faculty, Najran University, Saudi Arabia

Abstract:

Almarei milk is produced in Saudi Arabia from aqueous solutions; this study investigates its adsorption behavior pertaining to three types of anthocyanin pigments that are used as natural food colorants and adsorbents. The three anthocyanin pigments were extracted from red cabbage (RC), grape peel (GP), and pomegranate peel (PP). The initial dye concentrations were 10-50 mg/L and temperature of the solution was 35 °C. For an equilibrium isotherms and kinetic data were evaluated using the adsorption isotherms models such as Freundlich and Langmuir models. The results which were recorded show that the best adsorption model fit with the experimental data was Langmuir model in contrast with the Freundlich model. Also more suitable adsorption kinetics model was pseudo-second order and intraparticle diffusion models than the first-order reactions. An exothermic nature was found form the results of thermodynamic adsorption for each of thermodynamic parameters like entropy (S?), (H?) enthalpy, and free energy (G?).

Page(s): 98-108

DOI: DOI not available

Published: Journal: Journal of Chemical Society of Pakistan, Volume: 44, Issue: 1, Year: 2022

Keywords:

anthocyanins , Natural Adsorbents , Milk Solution

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