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

Magnusson, M, Yuen, AKL, Zhang, R, Wright, JT ORCID: 0000-0002-1085-4582, Taylor, RB, Maschmeyer, T and de Nys, R 2017 , 'A comparative assessment of microwave assisted (MAE) and conventional solid-liquid (SLE) techniques for the extraction of phloroglucinol from brown seaweed' , Algal Research, vol. 23 , pp. 28-36 , doi: 10.1016/j.algal.2017.01.002.

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Abstract

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°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.

Item Type: Article
Authors/Creators:Magnusson, M and Yuen, AKL and Zhang, R and Wright, JT and Taylor, RB and Maschmeyer, T and de Nys, R
Keywords: hydrothermal liquefaction, hydrothermal upgrading, phenolic compounds, biorefinery, macroalgae, bioproducts
Journal or Publication Title: Algal Research
Publisher: Elsevier BV
ISSN: 2211-9264
DOI / ID Number: 10.1016/j.algal.2017.01.002
Copyright Information:

Copyright 2017 Elsevier B.V.

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