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Optimisation of Alginate Extraction and Characterisation of Polysaccharides from Brown Seaweed from the Portuguese Coast

2026-02-01Artigo de investigação Acesso aberto
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dc.contributor.authorMendes, Joana Corrêa
dc.contributor.authorValente, Joana F. A.
dc.contributor.authorSousa, Fanipt_PT
dc.contributor.authorBernardino, Raul
dc.contributor.authorBernardino, Susana
dc.contributor.authorAfonso, Clélia
dc.contributor.authorChagas, Bárbara
dc.date.accessioned2026-01-24T12:02:46Z
dc.date.available2026-01-24T12:02:46Z
dc.date.issued2026-02-01pt_PT
dc.date.updated2026-02-05T20:22:09Z
dc.descriptionThis work had the support of national funds through Fundação para a Ciência e Tecnologia (FCT, Portugal), within the scope of the projects: UIDB/00709/2020 (DOI 10.54499/UIDB/00709/2020); UIDP/00709/2020 (DOI 10.54499/UIDP/00709/2020); UIDB/04044/2020 (DOI 10.54499/UIDB/ 04044/2020); UIDP/04044/2020 (DOI 10.54499/UIDP/04044/2020); UID/PRR/04044/2025 (DOI 10.54499/UID/PRR/04044/2025); UID/04292/2025 (DOI 10.54499/UID/04292/2025); UID/50020/ 2025 (DOI: 10.54499/UID/50020/2025); UIDP/50020/2020 (DOI: 10.54499/UIDP/50020/2020); LA/P/0112/2020 (DOI 10.54499/LA/P/0112/2020); LA/P/0069/2020 (DOI 10.54499/LA/P/0069/ 2020); LA/P/0045/2020 (DOI: 10.54499/LA/P/0045/2020). The research work was also conducted under the PREDICTOS project, which received funding from the European Union’s Horizon Europe research and innovation program under Grant Agreement n. 101079372, and also by the project Programa de Recuperação e Resiliência-PRR: Packing of the future®, Green Agenda for Business Innovation, investment project n. 59, funded by the PRR, NextGenerationEU and the project Optimised additive biomanufacturing system to produce hierarchical multi-tissue scaffolds for the treatment of joint diseases (InnovaBIOMAS)—Ref. 2022. 10564.PTDC.
dc.description.abstractAlginate is a widely used and versatile biopolymer with an ever-expanding range of applications in the pharmaceutical and biomedical industries. This highlights the importance of developing sustainable and renewable production sources. Conventional extraction methods, although effective, are often energy-intensive and rely on harsh chemicals. In this context, brown algae are a promising alternative due to their abundance and renewability. This study investigated the potential of Saccorhiza polyschides and Sargassum muticum as sources of sodium alginate (SA), thus optimising an extraction process that combines acid treatment with an alkaline step. The extracted biopolymers were characterised using FTIR, H-NMR, STA, SEM/EDX, viscosity measurements, dynamic light scattering, and spectrophotometric assays of residual polyphenols and proteins. The optimised extraction conditions produced yields above 20% of high-purity alginate. When compared with commercial SA, the extracted materials showed comparable quality while relying on a simplified, solvent-reduced protocol that improves process efficiency and reduces the environmental impact. These results demonstrate that S. polyschides and S. muticum are promising, locally available sources of high-quality sodium alginate, and that industrially relevant yields (>20%) can be achieved through an environmentally conscious two-step extraction process.pt_PT
dc.description.versionN/A
dc.identifier.citationMendes, J. C., Valente, J. F. A., Sousa, F., Bernardino, R., Bernardino, S., Afonso, C., & Chagas, B. (2026). Optimisation of Alginate Extraction and Characterisation of Polysaccharides from Brown Seaweed from the Portuguese Coast. Marine Drugs, 24(2), 60.pt-PT
dc.identifier.doi10.3390/md24020060pt_PT
dc.identifier.issn1660-3397
dc.identifier.slugcv-prod-4714522
dc.identifier.urihttp://hdl.handle.net/10400.8/15644
dc.language.isoeng pt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationMARE - Marine and Environmental Sciences Centre
dc.relationAquatic Research Infrastructure Network
dc.relation10.54499/LA/P/0069/2020pt_PT
dc.relation.publisherversionhttps://www.mdpi.com/1660-3397/24/2/60pt_PT
dc.rights.urihttp://creaticecommons.org/licence/by/4.0/pt_PT
dc.subjectbrown seaweedspt_PT
dc.subjectalginatept_PT
dc.subjectpolysaccharidespt_PT
dc.subjectextraction methodspt_PT
dc.subjectSaccorhiza polyschidespt_PT
dc.subjectSargassum muticumpt_PT
dc.titleOptimisation of Alginate Extraction and Characterisation of Polysaccharides from Brown Seaweed from the Portuguese Coasteng
dc.typeresearch articlept_PT
dspace.entity.typePublication
oaire.awardTitleMARE - Marine and Environmental Sciences Centre
oaire.awardTitleAquatic Research Infrastructure Network
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMAR%2F04292%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0069%2F2020/PT
oaire.citation.titleMarine Drugspt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.affiliation.nameESTM / CDRSP
person.affiliation.nameMARE / ESTM
person.familyNameCorrêa Mendes de Sousa Fernandes
person.familyNameValente
person.familyNameBernardino
person.familyNameBernardino
person.familyNameAfonso
person.familyNameFerreira Chagas
person.givenNameJoana
person.givenNameJoana
person.givenNameRaul
person.givenNameSusana
person.givenNameClélia
person.givenNameBárbara
person.identifier826126
person.identifier153274
person.identifier.ciencia-id681B-CB14-8C8E
person.identifier.ciencia-id7515-7468-212D
person.identifier.ciencia-idE418-2945-9EB6
person.identifier.ciencia-idC512-13C3-50DD
person.identifier.ciencia-id2210-8754-7CA0
person.identifier.orcid0000-0002-2408-9762
person.identifier.orcid0000-0002-7775-0614
person.identifier.orcid0000-0001-9454-3281
person.identifier.orcid0000-0002-4167-5237
person.identifier.orcid0000-0003-0740-9637
person.identifier.ridM-1930-2019
person.identifier.ridA-2338-2010
person.identifier.ridB-1211-2016
person.identifier.scopus-author-id56273710100
person.identifier.scopus-author-id14824775000
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.cv.cienciaidC512-13C3-50DD | CLÉLIA PAULETE CORREIA NEVES AFONSO
rcaap.rightsopenAccesspt_PT
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