Optimization of NADES-based green extraction of ellagitannins from rambutan peel with enhanced antioxidant activity

Could the peel of a rambutan—often tossed aside—hold the key to a greener, more powerful antioxidant extraction? This study says yes, using nature-inspired solvents to unlock ellagitannins.

Rambutan peels are more than just waste—they're a treasure trove of ellagitannins, potent antioxidants that could be extracted more sustainably. This research dives into optimizing a green extraction method using Natural Deep Eutectic Solvents (NADES), a class of solvents that are biodegradable, non-toxic, and often derived from plant metabolites. The study focuses on how these NADES-based systems can be fine-tuned to maximize the yield of ellagitannins while boosting the antioxidant activity of the extracts. By tweaking parameters like solvent composition, temperature, and time, the researchers achieved an extraction process that is both efficient and environmentally friendly. The result? A more sustainable way to turn agricultural waste into high-value bioactive compounds, with potential applications in food, cosmetics, and pharmaceuticals. This work highlights the untapped potential of rambutan peel as a source of natural antioxidants, all while reducing environmental impact.

Key Points

• NADES-based extraction optimizes ellagitannin yield from rambutan peel.
• Green solvents boost antioxidant activity of extracts.
• Sustainable valorization of agricultural waste into high-value compounds.