From sea to solution: A review of green extraction approaches for unlocking the potential of brown algae

The ocean's humble brown algae could hold the key to a treasure trove of bioactive compounds—if we can extract them without harming the planet. With global aquatic plant production hitting 31.2 million, the race is on for greener methods.

Brown algae are more than just seaweed—they are factories of bioactive compounds with serious industrial value in pharmaceuticals, cosmetics, food, and agriculture. But the old-school extraction methods, like solvent extraction and hydrodistillation, come with a hefty environmental price tag and inefficiencies that just won't do anymore.

Enter green extraction. This review digs into the paradigm shift, spotlighting advanced techniques like supercritical fluid extraction (SFE), microwave-assisted extraction (MAE), and subcritical water extraction (SWE). Each method gets a close look at its mechanisms, perks, and real-world applications, all while staying true to the principles of sustainability.

The authors sifted through English-language articles published between 2004 and 2023 to piece together this comprehensive picture. They don't shy away from the hurdles—scaling up these green methods isn't easy—but they also map out future directions for making bioactive compound extraction from brown algae both eco-friendly and effective.

For researchers and industries alike, the message is clear: by embracing these eco-conscious techniques, we can tap into the ocean's bounty without draining the planet's health. The sea has given us a solution; now it's time to use it wisely.

Key Points

• Green extraction methods for brown algae reviewed
• SFE, MAE, SWE offer sustainable alternatives
• Bioactive compounds valuable for pharma, cosmetics, food