Seaweed biorefinery

Torres, María Dolores; Kraan, Stefan; Domı́nguez, Herminia

doi:10.1007/s11157-019-09496-y

Cited by 116 publications

(57 citation statements)

References 467 publications

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“…Seaweed or macroalgae, with over 10,000 species, have been highlighted as promising sources of novel molecules and bioactive compounds in recent years [1,2]. Macroalgae are able to adapt to extreme environmental conditions by producing molecules such as polysaccharides, phenolic compounds, vitamins and minerals [1]. There is an increased interest in extracting these compounds for their use as pharmaceuticals, functional foods and nutraceuticals.…”

Section: Introductionmentioning

confidence: 99%

“…Nutraceuticals are compounds with health benefits beyond those of basic nutrition when included in food products, offering possibilities in the prevention of pathological conditions in subjects not yet eligible for conventional pharmacological treatments [2,3]. Polysaccharides from macroalgae have been explored as nutraceuticals due to their wide range of biological properties including antioxidants [1,2,4]. There is evidence correlating the overproduction of reactive oxygen species (ROS) with ageing and multiple chronic diseases such as cancer, cardiovascular diseases and neurodegenerative disorders [5].…”

Section: Introductionmentioning

confidence: 99%

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Exploring Ultrasound, Microwave and Ultrasound–Microwave Assisted Extraction Technologies to Increase the Extraction of Bioactive Compounds and Antioxidants from Brown Macroalgae

et al. 2020

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This study aims to determine the influence of (1) ultrasound-assisted extraction (UAE), (2) microwave-assisted extraction (MAE) and (3) a combination of ultrasound–microwave-assisted extraction (UMAE) on the yields of fucose-sulphated polysaccharides (FSPs), total soluble carbohydrates and antioxidants extracted from A. nodosum. Scanning electron microscopy (SEM) was used to evaluate the influence of the extraction technologies on the surface of macroalgae while principal component analysis was used to assess the influence of the extraction forces on the yields of compounds. UMAE generated higher yields of compounds compared to UAE and MAE methods separately. The maximum yields of compounds achieved using UMAE were: FSPs (3533.75 ± 55.81 mg fucose/100 g dried macroalgae (dm)), total soluble carbohydrates (10408.72 ± 229.11 mg glucose equivalents/100 g dm) and phenolic compounds (2605.89 ± 192.97 mg gallic acid equivalents/100 g dm). The antioxidant properties of the extracts showed no clear trend or extreme improvements by using UAE, MAE or UMAE. The macroalgal cells were strongly altered by the application of MAE and UMAE, as revealed by the SEM images. Further research will be needed to understand the combined effect of sono-generated and microwave-induced modifications on macroalgae that will allow us to tailor the forces of extraction to target specific molecules.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploring Ultrasound, Microwave and Ultrasound–Microwave Assisted Extraction Technologies to Increase the Extraction of Bioactive Compounds and Antioxidants from Brown Macroalgae

et al. 2020

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“…They constitute a valuable source of biologically active compounds that can be used for the production of pharmaceuticals (chemicals), nutraceuticals, cosmetics, food, feed, fertilizers/biostimulants, etc. The downside is that the waste generated during their processing plus the natural occurrence of invasive species pose a major environmental problem [1][2][3]. One of the solutions to manage abounding green tide algae is pyrolysis, which is a thermal decomposition of biomass under oxygen-limited conditions, typically at a temperature range within 300-700 • C, within which algal waste can be converted to a solid product such as biochar, liquid (bio-oil) and gas [1,[4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Biochar from A Freshwater Macroalga as A Potential Biosorbent for Wastewater Treatment

Michalak

Baśladyńska

Mokrzycki

et al. 2019

Water

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The multi-elemental composition, surface texture and morphology of biochar, produced by pyrolysis at 300, 350, 400 and 450 °C from freshwater macroalga Cladophora glomerata, as a biosorbent of toxic metals was examined with Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), Scanning Electron Microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FT-IR) techniques. It was found that the yield of pyrolysis was inversely proportional to temperature: for 300 °C it was 63%, whereas for 450 °C—47%. The proximate analysis revealed that also biochar’s moisture and volatile matter was inversely proportional to temperature. The content of ash increased with temperature. All biochars were characterized by a similar total pore area of about 20 m2 g−1. FT-IR analysis showed that all biochars peaked at 3500–3100 cm−1 which was attributed to O–H stretching of the hydroxyl groups, at 2850–2970 cm−1, stretching vibrations of C–H bonds in aliphatic CH2 and CH groups, at 1605 cm−1, stretching vibrations from C=C of aromatics, at 1420 cm−1, bending oscillations from CH2, at about 1111 cm−1, stretching vibrations of Si–O, at 618 cm−1, vibrations from Fe–O bonds, and at 475 cm−1—Si–O–Si deformation vibrations. The biosorption properties of biochar towards Cr(III) ions were examined in kinetic studies. The biosorption capacity of biochar increased with an increase of pyrolysis temperature: the highest was for biochar obtained at 450 °C—87.1 mg Cr(III) g−1 and the lowest at 300 °C—45.9 mg g−1. Cladophora biochar also demonstrated a good ability to simultaneously remove metal ions from a multi-metal system, e.g., wastewater. The removal efficiency for Cr(III) was 89.9%, for Cu(II) 97.1% and for Zn(II) 93.7%. The biochar derived from waste-freshwater macroalgae can be a potent and eco-friendly alternative adsorptive material.

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“…Many EU projects have been financed for research in this field. For example, the recently concluded EU FP7 project BYEFOULING was aimed to design, develop, and upscale antifouling coatings through the use of Kim et al, 2013;Torres et al, 2019Hildebrand et al, 2012Maeda et al, 2017 Using Undaria pinnatifida for biofuel production Untapping the potential of diatoms to be included in biofuels research and industry due to their high lipid content…”

Section: Replacementioning

confidence: 99%

“…Microalgae, seaweed and jellyfish have been studied and screened for potential product development in terms of the reuse of their biomass as fertilizers or biostimulants, or feed and food (Bleve et al, 2019;Leone et al, 2019;Torres et al, 2019). Seaweeds have already been used in the food processing industry (e.g., for production of agar, alginates), but many other applications are possible.…”

Section: Reusementioning

confidence: 99%

Non-indigenous Species in the Mediterranean Sea: Turning From Pest to Source by Developing the 8Rs Model, a New Paradigm in Pollution Mitigation

et al. 2020

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For mitigation of the effects of pollution, the media, policy makers and, in turn, the scientific community and industry each provide contributions through development of a sense of urgency, and with guidelines and solutions. For non-indigenous species (NIS) that can frequently have negative impacts on the native biota, this is often conveyed in an emotive way to the general public, who are typically keen to help and to get personally involved. This might be through organization of cleaning campaigns, influence on the media, or collaboration with scientists, to inform them of the local presence and abundance of NIS. Alternatively, they might proactively develop technological solutions themselves. To assess the current state of affairs, we reviewed the presence and effects of NIS in the Mediterranean Sea. As so often, any well-planned and successful activity is directly linked to financing, or a lack thereof, and this leads to sometimes untargeted and sporadic measures that are developed within a project or over a limited timeframe, without any sustainability measures. Therefore, we also assessed the activities and strategies that have been financed in this area of NIS mitigation. Based on this review of the presence and impact of NIS, and previous and ongoing activities, we propose a new paradigm to mitigate such pollution: the 8Rs model (i.e., Recognize, Reduce, Replace, Reuse, Recycle, Recover/Restore, Remove, and Regulate). This model extends from the more traditional 3Rs model (i.e., Reduce, Reuse, and Recycle) that is often used and promoted for innovative waste management strategies. Importantly, the 8Rs model can be applied sequentially, for either prevention of NIS introduction, or preparation of mitigation measures. The 8Rs model was constructed based on Mediterranean NIS, although we believe it can be applied to other sources of pollution and other geographic areas. Importantly, the 8Rs model represents a general framework to organize and categorize future pollution mitigation strategies. This approach is essential for development of any action plan to influence the administrative and financial decision makers who essentially enable these activities, and therefore who have important roles in the guarantee of sustainability of these actions, and the creation of innovative societies.

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Seaweed biorefinery

Cited by 116 publications

References 467 publications

Exploring Ultrasound, Microwave and Ultrasound–Microwave Assisted Extraction Technologies to Increase the Extraction of Bioactive Compounds and Antioxidants from Brown Macroalgae

Exploring Ultrasound, Microwave and Ultrasound–Microwave Assisted Extraction Technologies to Increase the Extraction of Bioactive Compounds and Antioxidants from Brown Macroalgae

Biochar from A Freshwater Macroalga as A Potential Biosorbent for Wastewater Treatment

Non-indigenous Species in the Mediterranean Sea: Turning From Pest to Source by Developing the 8Rs Model, a New Paradigm in Pollution Mitigation

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