Green Extraction Methods for Polyphenols from Plant Matrices and Their Byproducts: A Review.

Area of Science:

• Phytochemistry
• Green Chemistry
• Analytical Chemistry

Background:

• Polyphenols are vital phytochemicals with significant health benefits, particularly for lifestyle diseases and oxidative stress.
• Conventional polyphenol extraction methods face challenges in efficiency, speed, and environmental impact.
• Growing commercial interest necessitates exploration of sustainable and cost-effective extraction techniques.

Purpose of the Study:

• To review modern green extraction techniques for polyphenols.
• To compare their mechanisms, advantages, disadvantages, and efficiencies.
• To highlight their potential as alternatives to conventional methods.

Main Methods:

• Comparative review of green extraction techniques: Supercritical Fluid Extraction (SFE), Ultrasound-Assisted Extraction (UAE), Microwave-Assisted Extraction (MAE), Pressurized Liquid Extraction (PLE), and Pressurized Hot Water Extraction (PHWE).
• Analysis of factors affecting extraction efficiency and comparison with conventional methods.
• Evaluation of economic feasibility and environmental impact.

Main Results:

• Green extraction techniques offer reduced solvent use, time, and energy consumption compared to conventional methods.
• These methods demonstrate higher recovery rates and lower operational costs for thermolabile phenolic compounds.
• Techniques like SFE, UAE, MAE, PLE, and PHWE are effective alternatives for polyphenol extraction.

Conclusions:

• Modern green extraction techniques are promising for overcoming limitations in polyphenol exploitation.
• These methods facilitate wider industrial application and market penetration of plant-derived polyphenols.
• Further research is required to address scale-up challenges for industrial implementation.