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<p>This study presents a novel, sustainable protocol for the integrated fractionation of Arctic brown algae (<i>Fucus vesiculosus</i>) biomass using choline chloride-based natural deep eutectic solvents (NADES). For the first time, we demonstrate the selective fractionation of algal biomass into four high-value fractions via a green dissolution process followed by two step anti-solvent precipitation with acetone:water (10:1) mixture, water and hexane extraction. The selectivity was confirmed by the distinct separation into alginates (~ 30 wt.%), polysaccharides (~ 30 wt.%), polyphenols (~ 10 wt.%), and fatty acids (~ 2 wt.%) fractions with the predominant composition of each fraction verified by FTIR, NMR, and HRMS. The acetone–water system enabled critical separation of bioactive polyphenols and fatty acids from condensed aromatic structures, enhancing their potential functional value. The proposed approach establishes a foundation for scalable, zero-waste algal processing, with future research directed toward solvent recycling, detailed structural characterization of fractions, and evaluation of their bioactivity for pharmaceutical, cosmetic, and food applications.</p>

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Fractionation of arctic brown algae (Fucus vesiculosus) biomass using choline chloride-based natural deep eutectic solvents

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Artyom V. Belesov,
  • Daria A. Lvova,
  • Ilya I. Pikovskoi,
  • Mark S. Popov,
  • Danil I. Falev,
  • Anna V. Faleva,
  • Dmitry S. Kosyakov

摘要

This study presents a novel, sustainable protocol for the integrated fractionation of Arctic brown algae (Fucus vesiculosus) biomass using choline chloride-based natural deep eutectic solvents (NADES). For the first time, we demonstrate the selective fractionation of algal biomass into four high-value fractions via a green dissolution process followed by two step anti-solvent precipitation with acetone:water (10:1) mixture, water and hexane extraction. The selectivity was confirmed by the distinct separation into alginates (~ 30 wt.%), polysaccharides (~ 30 wt.%), polyphenols (~ 10 wt.%), and fatty acids (~ 2 wt.%) fractions with the predominant composition of each fraction verified by FTIR, NMR, and HRMS. The acetone–water system enabled critical separation of bioactive polyphenols and fatty acids from condensed aromatic structures, enhancing their potential functional value. The proposed approach establishes a foundation for scalable, zero-waste algal processing, with future research directed toward solvent recycling, detailed structural characterization of fractions, and evaluation of their bioactivity for pharmaceutical, cosmetic, and food applications.