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Solving urban water microplastics with bacterial cellulose hydrogels: leveraging predictive computational models

2023Journal article Open access
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dc.contributor.authorMendonça, Ivana
dc.contributor.authorSousa, Jessica
dc.contributor.authorCunha, César
dc.contributor.authorFaria, Marisa
dc.contributor.authorFerreira, Artur
dc.contributor.authorCordeiro, Nereida
dc.date.accessioned2023-04-21T11:11:49Z
dc.date.available2023-04-21T11:11:49Z
dc.date.issued2023
dc.description.abstractThe prevalence of microplastics (MPs) in both urban and aquatic ecosystems is concerning, with wastewater treatment plants being considered one of the major sources of the issue. As the focus on developing sustainable solutions increases, unused remnants from bacterial cellulose (BC) membranes were ground to form BC hydrogels as potential bioflocculants of MPs. The influence of operational parameters such as BC:MPs ratio, hydrogel grinding, immersion and mixing time, temperature, pH, ionic strength, and metal cations on MPs flocculation and dispersion were evaluated. A response surface methodology based on experimental data sets was computed to understand how these parameters influence the flocculation process. Further, both the BC hydrogel and the hetero-aggregation of MPs were characterised by UV–Vis, ATR-FTIR, IGC, water uptake assays, fluorescence, and scanning electron microscopy. These highlights that the BC hydrogel would be fully effective at hetero aggregating MPs in naturally-occurring concentrations, thereby not constituting a limiting performance factor for MPs’ optimal flocculation and aggregation. Even considering exceptionally high concentrations of MPs (2 g/ L) that far exceed naturally-occurring concentrations, the BC hydrogel was shown to have elevated MPs floc culation activity (reaching 88.6%: 1.77 g/L). The computation of bioflocculation activity showed high reliability in predicting flocculation performance, unveiling that the BC:MPs ratio and grinding times were the most critical variables modulating flocculation rates. Also, short exposure times (5 min) were sufficient to drive robust particle aggregation. The microporous nature of the hydrogel revealed by electron microscopy is the likely driver of strong MPs bioflocculant activity, far outperforming dispersive commercial bioflocculants like xanthan gum and alginate. This pilot study provides convincing evidence that even BC remainings can be used to produce highly potent and circular bioflocculators of MPs, with prospective application in the wastewater treatment industrypt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.chemosphere.2022.137719pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/5132
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationBD/6615/2020pt_PT
dc.relationInterdisciplinary Centre of Marine and Environmental Research
dc.relationInterdisciplinary Centre of Marine and Environmental Research
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectBacterial cellulosept_PT
dc.subjectBiopolymerpt_PT
dc.subjectMicroplasticspt_PT
dc.subjectFlocculationpt_PT
dc.subjectBioremediationpt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleSolving urban water microplastics with bacterial cellulose hydrogels: leveraging predictive computational modelspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleInterdisciplinary Centre of Marine and Environmental Research
oaire.awardTitleInterdisciplinary Centre of Marine and Environmental Research
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04423%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04423%2F2020/PT
oaire.citation.startPage137719pt_PT
oaire.citation.titleChemospherept_PT
oaire.citation.volume314pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameda Silva Mendonça
person.familyNameCunha
person.familyNameFaria
person.familyNamecordeiro
person.givenNameIvana Rita
person.givenNameCésar
person.givenNameMarisa Camacho Gonçalves
person.givenNamenereida
person.identifier3435316
person.identifier1612636
person.identifier.ciencia-id7619-C648-AE6C
person.identifier.ciencia-idEC12-B90B-BA98
person.identifier.ciencia-idD716-6F48-AD0E
person.identifier.ciencia-id521A-0F62-EA39
person.identifier.orcid0000-0002-9148-026X
person.identifier.orcid0000-0003-3811-2932
person.identifier.orcid0000-0002-9158-6961
person.identifier.orcid0000-0001-6006-3415
person.identifier.ridO-2253-2019
person.identifier.scopus-author-id7004319456
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.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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