Green and integrated processing approaches for the recovery of high-value compounds from brown seaweeds

Bordoloi, Achinta; Goosen, Neill J.

doi:10.1016/bs.abr.2019.11.011

Cited by 23 publications

(69 citation statements)

References 135 publications

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“…Polysaccharides are mainly located in the cell walls of seaweeds. The polysaccharides content in seaweeds is species dependent with values ranging from 4% to 76% dry weight (d.w.) [ 27 ], with a wide application due to their functional and bioactive properties [ 28 ]. Their chemical composition and molecular weight are also dependent on the species of the raw seaweed as well as on the extraction procedure.…”

Section: Seaweeds Classification and Chemical Compositionmentioning

confidence: 99%

“…Laminarins have also demonstrated good bioactive properties such as antibacterial, antioxidative and anticoagulant potential. Due to their resistance to hydrolysis in the upper gastrointestinal tract, they are classified as dietary fibers [ 28 ]. Alginate provides to the seaweed flexibility and stability against the marine currents.…”

Section: Seaweeds Classification and Chemical Compositionmentioning

confidence: 99%

“…The fractionation processes for the recovery of seaweed functional biocompounds can be divided in: raw material pre-treatment, extraction (single or multiple steps), followed by separation and concentration [ 28 ]. In many cases the use of additional pre-treatments, such as alkali pretreatment to remove sulphate groups from agar, improve the recovery final results [ 49 , 59 ].…”

Section: Recovery Of Added-value Compoundsmentioning

confidence: 99%

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Advances in Extraction Methods to Recover Added-Value Compounds from Seaweeds: Sustainability and Functionality

Matos

Pereira

Genisheva

et al. 2021

Foods

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Seaweeds are a renewable natural source of valuable macro and micronutrients that have attracted the attention of the scientists in the last years. Their medicinal properties were already recognized in the ancient traditional Chinese medicine, but only recently there has been a considerable increase in the study of these organisms in attempts to demonstrate their health benefits. The extraction process and conditions to be used for the obtention of value-added compounds from seaweeds depends mainly on the desired final product. Thermochemical conversion of seaweeds, using high temperatures and solvents (including water), to obtain high-value products with more potential applications continues to be an industrial practice, frequently with adverse impact on the environment and products’ functionality. However more recently, alternative methods and approaches have been suggested, searching not only to improve the process performance, but also to be less harmful for the environment. A biorefinery approach display a valuable idea of solving economic and environmental drawbacks, enabling less residues production close to the much recommended zero waste system. The aim of this work is to report about the new developed methods of seaweeds extractions and the potential application of the components extracted.

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Section: Seaweeds Classification and Chemical Compositionmentioning

confidence: 99%

Section: Seaweeds Classification and Chemical Compositionmentioning

confidence: 99%

Section: Recovery Of Added-value Compoundsmentioning

confidence: 99%

See 1 more Smart Citation

Advances in Extraction Methods to Recover Added-Value Compounds from Seaweeds: Sustainability and Functionality

Matos

Pereira

Genisheva

et al. 2021

Foods

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show abstract

“…The consumption of seaweeds is a long tradition in many Asian countries and recently has also increased in Europe and North America [1]. Many seaweed species contain significant quantities of compounds such as polyphenols, polysaccharides, carotenoids, fibres, minerals, trace elements, proteins and amino acids [2][3][4]. Moreover, brown seaweeds are good sources of polyphenolic compounds such as phlorotannins, flavanols and catechins [5].…”

Section: Introductionmentioning

confidence: 99%

“…However, toxicity, low yield of extracts and prevalence of residues in the target compound have always been a concern. Extraction of these compounds at a commercial scale requires high extraction yields as well as intact biological activities, which are difficult to achieve using conventional extraction methods [4]. Therefore, to address these shortcomings, and to facilitate the transition towards more environmentally sustainable extraction technologies, there is a need to develop new, safe, effective and affordable extraction technologies, which give maximum product yield, minimum presence of residues and enable attainment of clean label status.…”

Section: Introductionmentioning

confidence: 99%

Optimisation of Ultrasound Frequency, Extraction Time and Solvent for the Recovery of Polyphenols, Phlorotannins and Associated Antioxidant Activity from Brown Seaweeds

et al. 2020

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This study investigates ultrasound assisted extraction (UAE) process parameters (time, frequency and solvent) to obtain high yields of phlorotannins, flavonoids, total phenolics and associated antioxidant activities from 11 brown seaweed species. Optimised UAE conditions (35 kHz, 30 min and 50% ethanol) significantly improved the extraction yield from 1.5-fold to 2.2-fold in all seaweeds investigated compared to solvent extraction. Using ultrasound, the highest recovery of total phenolics (TPC: 572.3 ± 3.2 mg gallic acid equivalent/g), total phlorotannins (TPhC: 476.3 ± 2.2 mg phloroglucinol equivalent/g) and total flavonoids (TFC: 281.0 ± 1.7 mg quercetin equivalent/g) was obtained from Fucus vesiculosus seaweed. While the lowest recovery of TPC (72.6 ± 2.9 mg GAE/g), TPhC (50.3 ± 2.0 mg PGE/g) and TFC (15.2 ± 3.3 mg QE/g) was obtained from Laminaria digitata seaweed. However, extracts from Fucus serratus obtained by UAE exhibited the strongest 1,1-diphenyl-2-picryl-hydrazyl (DPPH) scavenging activity (29.1 ± 0.25 mg trolox equivalent/g) and ferric reducing antioxidant power (FRAP) value (63.9 ± 0.74 mg trolox equivalent/g). UAE under optimised conditions was an effective, low-cost and eco-friendly technique to recover biologically active polyphenols from 11 brown seaweed species.

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Current status and trends in extraction of bioactives from brown macroalgae using supercritical CO₂ and subcritical water

Gan

Baroutian

2022

J of Chemical Tech & Biotech

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Bioactive compounds from brown seaweeds, such as polysaccharides, phenolics and pigments, have shown a range of health‐promoting properties that can be implemented in products like functional foods, cosmetics and medicine. Extraction is therefore crucial in recovering these bioactive compounds, but conventional methods today need to be more sustainable and efficient. In this review, the extraction of brown seaweeds using supercritical carbon dioxide (SCCO2) and subcritical water (SCW) is discussed comprehensively. Previous studies have shown that these two extraction technologies enhance the overall extraction yield of brown seaweed bioactive compounds when process parameters are optimised. These technologies have also been combined, either together or with other extraction methods, to improve overall extraction yield. Although this review shows the research progress of these technologies for brown seaweeds, scale‐up operations are still challenging owing to a variety of factors. Further research should focus on optimisation such that scale‐up is less difficult. With the knowledge presented in this review and with further work, these eco‐friendly extraction technologies could be commercialised within the seaweed industry. © 2022 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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Green and integrated processing approaches for the recovery of high-value compounds from brown seaweeds

Cited by 23 publications

References 135 publications

Advances in Extraction Methods to Recover Added-Value Compounds from Seaweeds: Sustainability and Functionality

Advances in Extraction Methods to Recover Added-Value Compounds from Seaweeds: Sustainability and Functionality

Optimisation of Ultrasound Frequency, Extraction Time and Solvent for the Recovery of Polyphenols, Phlorotannins and Associated Antioxidant Activity from Brown Seaweeds

Current status and trends in extraction of bioactives from brown macroalgae using supercritical CO₂ and subcritical water

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Green and integrated processing approaches for the recovery of high-value compounds from brown seaweeds

Cited by 23 publications

References 135 publications

Advances in Extraction Methods to Recover Added-Value Compounds from Seaweeds: Sustainability and Functionality

Advances in Extraction Methods to Recover Added-Value Compounds from Seaweeds: Sustainability and Functionality

Optimisation of Ultrasound Frequency, Extraction Time and Solvent for the Recovery of Polyphenols, Phlorotannins and Associated Antioxidant Activity from Brown Seaweeds

Current status and trends in extraction of bioactives from brown macroalgae using supercritical CO2 and subcritical water

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Product

Resources

About

Current status and trends in extraction of bioactives from brown macroalgae using supercritical CO₂ and subcritical water