A comparative assessment of microwave assisted (MAE) and conventional solid-liquid (SLE) techniques for the extraction of phloroglucinol from brown seaweed

作者：Magnusson Marie; Yuen Alexander K L; Zhang Rui; Wright Jeffrey T; Taylor Richard B; Maschmeyer Thomas; de Nys Rocky

来源：Algal Research-Biomass Biofuels and Bioproducts, 2017, 23: 28-36.

DOI：10.1016/j.algal.2017.01.002

• Hydrothermal liquefaction
• Hydrothermal upgrading
• Phenolic compounds
• Biorefinery
• Macroalgae
• Bioproducts

Brown seaweeds are rich in polyphenols with a basic building block of 1,3,5-trihydroxybenzene (phloroglucinol) and were investigated as a bioresource for the extraction of polyphenols for biopolymers and bioproducts. Species of seaweed with high contents of polyphenols were identified through meta-analysis and selected for the comparative assessment of the extraction efficiency of polyphenols using microwave assisted (MAE) vs. conventional solid-liquid (SLE) extraction. Out of ten species from Australia and New Zealand screened by SLE, Carpophyllum flexuosum(8.6%) and C. plumosum(7.5%) had the highest contents of polyphenols and were selected for MAE along with commercially available Ecklonia radiata. C. flexuosum was identified as the key species for extraction of polyphenols, with a 70% increase in yield using optimized MAE (aqueous, biomass: solvent ratio 1: 30, 160 degrees C, 3 min) compared to SLE. The cell-wall bound fraction of polyphenols in brown seaweed may be larger than previously thought and is accessible through MAE.

• 出版日期2017-4