Search

This study evaluates the physicochemical properties, phenolic and flavonoid content, antioxidant activity, and molecular docking interactions of honey from eastern Morocco. Analysis confirmed compliance with European Commission standards, with moisture content ranging from 15.39% to 19.74% and pH between 3.79 and 4.94. Carob honey exhibited the highest protein content (0.42%), polyphenol concentration (720.16 mg gallic acid/kg), flavonoid content (90.5 mg catechin/kg), and antioxidant activity (63.5% DPPH inhibition). Strong correlations were observed between phenolic and flavonoid content and antioxidant properties. Molecular docking identified ethyl phenylacetate and thymol as key compounds with significant interactions with cytochrome c peroxidase, suggesting potential therapeutic effects. DFT calculations supported these findings, indicating these compounds may enhance antioxidant activity. The study highlights the exceptional quality and antioxidant capacity of honey from eastern Morocco, reflecting its unique floral sources and potential as a natural source of antioxidants with therapeutic benefits. [ABSTRACT FROM AUTHOR]

Highlights: The use of inexpensive, easily obtained, and ecological adsorbents. New bio-adsorbents were made for Colorant adsorption from an aqueous solution. EBT dye adsorption capacities ranged from 1.8 to 2.8 mg.g−1. Adsorptions of EBT dye by the activated carbon of cannabis. This study provides cost-effective and sustainable production of activated carbon. Application of mathematical modeling to develop new relevant mathematical models based on experimental results. In the present work, the adsorption behavior of Eriochrome Black T (EBT) on waste hemp activated carbon (WHAC) was examined. The surface of the WHAC was modified by H3PO4 acid treatment. The surface and structural characterization of the adsorbents was carried out using Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) analysis. The effect of influential adsorption parameters (pH, contact time, dosage, and initial concentration) on the adsorption of EBT onto WHAC was examined in batch experiments; some adsorption parameters such as pH, concentration and dose were improved by new mathematical models. The adsorption behavior of EBT on the surfaces of WHAC was evaluated by applying different isotherm models (Langmuir, Freundlich, Temkin and Dubinin–Radushkevich) to equilibrium data. The adsorption kinetics was studied by using pseudo-first-order, pseudo-second-order, Elovich and intraparticle models on the model. Adsorption followed the pseudo-second-order rate kinetics. The maximum removal of EBT was found to be 44–62.08% by WHAC at pH = 7, adsorbent dose of 10–70 mg, contact time of 3 h and initial dye concentration of 10 mg.L−1. The maximum adsorption capacities were 14.025 mg.g−1 obtained by calculating according to the Langmuir model, while the maximum removal efficiency was obtained at 70 mg equal to 62.08% for the WHAC. The adsorption process is physical in the monolayer and multilayer. [ABSTRACT FROM AUTHOR]