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

Magnusson, Marie, Yuen, Alexander K.L., Zhang, Rui, Wright, Jeffrey T., Taylor, Richard B., Maschmeyer, Thomas, and de Nys, Rocky (2017) A comparative assessment of microwave assisted (MAE) and conventional solid-liquid (SLE) techniques for the extraction of phloroglucinol from brown seaweed. Algal Research, 23. pp. 28-36.

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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 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.

Item ID: 50307
Item Type: Article (Research - C1)
ISSN: 2211-9264
Keywords: hydrothermal liquefaction, hydrothermal upgrading, phenolic compounds, biorefinery, macroalgae, bioproducts
Funders: Advanced Manufacturing Cooperative Research Centre (AMCRC), Science and Industry Endowment Fund (SIEF)
Projects and Grants: AMCRC DP109602, SIEF RP03-028
Date Deposited: 20 Sep 2017 07:49
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 30%
31 BIOLOGICAL SCIENCES > 3108 Plant biology > 310801 Phycology (incl. marine grasses) @ 30%
34 CHEMICAL SCIENCES > 3405 Organic chemistry > 340599 Organic chemistry not elsewhere classified @ 40%
SEO Codes: 86 MANUFACTURING > 8606 Industrial Chemicals and Related Products > 860604 Organic Industrial Chemicals (excl. Resins, Rubber and Plastics) @ 40%
82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8299 Other Plant Production and Plant Primary Products > 829999 Plant Production and Plant Primary Products not elsewhere classified @ 40%
97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 20%
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