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Circular Valorisation of Essential Oil Post-distillation by-products for Enhanced Xanthan Gum Bioproduction and Antimicrobial Treatments against Staphylococcus aureus

2026Artigo científico Acesso aberto
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datacite.subject.fosCiências Naturais::Ciências da Terra e do Ambiente
datacite.subject.fosCiências Naturais::Ciências Biológicas
datacite.subject.fosCiências Naturais::Outras Ciências Naturais
datacite.subject.sdg12:Produção e Consumo Sustentáveis
dc.contributor.authorAlmeida, Heloísa H.S.
dc.contributor.authorCrugeira, Pedro
dc.contributor.authorSantamaria-Echart, Arantzazu
dc.contributor.authorAmaral, Joana S.
dc.contributor.authorFinimundy, Tiane C.
dc.contributor.authorBarros, Lillian
dc.contributor.authorRodrigues, Alírio
dc.contributor.authorBarreiro, Filomena
dc.date.accessioned2026-06-05T09:41:51Z
dc.date.available2026-06-05T09:41:51Z
dc.date.issued2026
dc.description.abstractEssential oil (EO) post-distillation by-products, like hydrosols and wastewater, are sources of bioactive compounds. Aligned with the principles of the circular economy, these residues offer a cost-effective alternative for various applications. In this context, this study investigated xanthan gum (XG) biosynthesis by Xanthomonas campestris ATCC 33913 in a mineral salt medium supplemented with four hydrosols (Cupressus leylandii A.B. Jacks & Dallim, Eucalyptus globulus Labill., Aloysia citrodora Pal & aacute;u, and Melissa officinalis L.), achieving a 15.8% increase in production (13.91 g/L) when 10% C. leylandii hydrosol was used, compared to the control (12.01 g/L). The combination of this XG sample with a 50:50 (v/v) A. citrodora hydrosol and wastewater mixture yielded a product with a strong antioxidant capacity (90.2% free radical scavenging) and bacteriostatic effects against Staphylococcus aureus. Moreover, its antimicrobial capacity increased over time, likely due to the bacteria's extended exposure to the bioactive compounds found in both by-products. These interactions may compromise the integrity of the cell membrane, thereby enhancing compounds' penetration, reducing S. aureus by 48.3% in clean conditions (low organic load) and 40.6% in dirty conditions (high organic load) after 45 min, both of which were significantly different from the control (p < 0.0001). The developed product demonstrated antimicrobial activity against S. aureus biofilms, reducing them by 35.9% (p < 0.001) after 45 min of treatment. This effect was increased (56.8%; p < 0.0001) by doubling the treatment time (90 min). Repurposing EO by-products as novel ingredients provides antioxidant and antimicrobial benefits for innovative products targeting S. aureus and its biofilms.eng
dc.description.sponsorshipFinancial support through national funds FCT/MCTES (PIDDAC) to CIMO UIDB/00690/2020 (https://doi.org/10.54499/UIDB/00690/2020) and UIDP/00690/2020 (https://doi.org/10.54499/UIDP/00690/2020), and SusTEC LA/P/0007/2021 (https://doi.org/10.54499/LA/P/0007/2020), LSRE-LCM UIDB/50020/2020 (https://doi.org/10.54499/UIDB/50020/2020) and UIDP/00690/2020 (https://doi.org/10.54499/UIDP/50020/2020), ALiCE LA/P/0045/2020 (https://doi.org/10.54499/LA/P/0045/2020); and national funding by FCT, P.I., through the institutional scientific employment program contract for L. Barros (CEEC-INST, https://doi.org/10.54499/CEECINST/00107/2021/CP2793/CT0002). Pedro Crugeira thanks OleaChain (NORTE-06-3559-FSE14 000188) for his research contract. National funding by FCT, through the institutional program contract for scientific employment of A. Santamaria-Echart, and the PhD grant of Heloísa Helena Scorsato de Almeida (https://doi.org/10.54499/SFRH/BD/148124/2019). Deifil Technology Lda (www.deifil.pt) for supplying the studied plants.
dc.identifier.citationAlmeida, Heloísa H.S.; Crugeira, Pedro; Santamaria-Echart, Arantzazu; Amaral, Joana S.; Finimundy, Tiane C.; Barros, Lillian; Rodrigues, Alírio E.; Barreiro, Filomena (2026). Circular Valorisation of Essential Oil Post-distillation by-products for Enhanced Xanthan Gum Bioproduction and Antimicrobial Treatments against Staphylococcus aureus. Waste and Biomass Valorization. ISSN 1877-2641. 17:6, p. 3073–3093
dc.identifier.doi10.1007/s12649-025-03302-3
dc.identifier.issn1877-2641
dc.identifier.issn1877-265X
dc.identifier.urihttp://hdl.handle.net/10198/36835
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer
dc.relationMountain Research Center - UIDP/00690/2020
dc.relationAssociate Laboratory for Sustainability and Tecnology in Mountain Regions - LA/P/0007/2020
dc.relationLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
dc.relationALICE - Associate Laboratory in Chemical Engineering
dc.relation.ispartofWaste and Biomass Valorization
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectXanthan gum
dc.subjectEssential oil by-products
dc.subjectWaste valorisation
dc.subjectHydrosols
dc.subjectAntimicrobial activity
dc.subjectBiobased solutions
dc.titleCircular Valorisation of Essential Oil Post-distillation by-products for Enhanced Xanthan Gum Bioproduction and Antimicrobial Treatments against Staphylococcus aureuseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUIDP/00690/2020
oaire.awardNumberLA/P/0007/2020
oaire.awardNumberUIDP/50020/2020
oaire.awardNumberLA/P/0045/2020
oaire.awardTitleMountain Research Center - UIDP/00690/2020
oaire.awardTitleAssociate Laboratory for Sustainability and Tecnology in Mountain Regions - LA/P/0007/2020
oaire.awardTitleLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
oaire.awardTitleALICE - Associate Laboratory in Chemical Engineering
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00690%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0007%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50020%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0045%2F2020/PT
oaire.citation.endPage3093
oaire.citation.issue6
oaire.citation.startPage3073
oaire.citation.titleWaste and Biomass Valorization
oaire.citation.volume17
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
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