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Photochemical oxidation of polyethylene terephthalate microplastics adsorbed on sand and silica surfaces

2024-10-01Journal article Open access
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dc.contributor.authorQ. V. da Costa, Camila
dc.contributor.authorNobahar, Amir
dc.contributor.authorEgea-Corbacho, Agata
dc.contributor.authorJockusch, Steffen
dc.contributor.authorPower, Deborah Mary
dc.contributor.authorRamamurthy, Vaidhyanathan
dc.contributor.authorSilva, José Paulo da
dc.date.accessioned2024-10-23T13:36:46Z
dc.date.available2024-10-23T13:36:46Z
dc.date.issued2024-10-01
dc.description.abstractThe environmental contamination by plastics, microplastics, and related compounds is a major concern. While the detection and release of micro- and nanoparticles from these materials have been widely studied, the formation and release of molecules resulting from their degradation in the environment have been overlooked. This work presents a study of the products released from poly(ethylene terephthalate) (PET) irradiated as pure particles and adsorbed on silica and sand surfaces under different irradiation conditions. The role of oxygen was also evaluated. The products were identified by gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-high resolution mass spectrometry (LC-HRMS). The main released molecules can be accounted for by considering the cleavage of alpha- and beta-bonds next to the ester moiety of the polymer chain. Volatile products such as benzene as well as monomer units of the polymer and related products were identified. In the presence of oxygen, acetic acid and products resulting from hydroxylation at the benzenic ring or at the ethyl moiety were detected. Adsorption on silica and sand has little effect on the photoproduct distributions. The irradiation at 360 nm leads to distributions similar to the ones observed at 257 nm, but the reaction rate is lower. The identified product ethylene terephthalate is a marker of PET plastics and particles and can therefore be used to evaluate the environmental contamination by this polymer material.eng
dc.description.sponsorshipEXPL/CTA-AMB/1613/2021; EMBRC.PT ALG-01- 0145-FEDER-022121; 2022.14374.BD
dc.identifier.doi10.1021/acs.langmuir.4c02281
dc.identifier.eissn1520-5827
dc.identifier.issn0743-7463
dc.identifier.urihttp://hdl.handle.net/10400.1/26133
dc.language.isoeng
dc.peerreviewedyes
dc.publisherAmerican Chemical Society (ACS)
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.relation.ispartofLangmuir
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAromatic compounds
dc.subjectHydrocarbons
dc.subjectIrradiation
dc.subjectOrganic acids
dc.subjectOxygen
dc.titlePhotochemical oxidation of polyethylene terephthalate microplastics adsorbed on sand and silica surfaceseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.citation.issue41
oaire.citation.titleLangmuir
oaire.citation.volume40
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameQ. V. da Costa
person.familyNameNobahar
person.familyNamePower
person.familyNameSilva
person.givenNameCamila
person.givenNameAmir
person.givenNameDeborah Mary
person.givenNameJosé Paulo da
person.identifier2065549
person.identifierhttps://scholar.google.com/citations?user=Wgc6MlUAAAAJ&hl=en
person.identifier.ciencia-id931B-9699-7396
person.identifier.ciencia-id3A19-5673-BA9A
person.identifier.ciencia-id891A-8A44-3CAE
person.identifier.ciencia-id3413-C4F4-73F7
person.identifier.orcid0000-0001-8725-9100
person.identifier.orcid0000-0002-7401-9076
person.identifier.orcid0000-0003-1366-0246
person.identifier.orcid0000-0002-6458-7328
person.identifier.ridA-4606-2008
person.identifier.scopus-author-id7101806760
person.identifier.scopus-author-id7201733236
project.funder.identifierhttp://doi.org/10.13039/501100001871
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
project.funder.nameFundação para a Ciência e a Tecnologia
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