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Surface interactions during the removal of emerging contaminants by hydrochar-based adsorbents

2020-05-01Artigo científico Acesso aberto
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dc.contributor.authorRomán, Silvia
dc.contributor.authorNabais, Joâo Manuel Valente
dc.contributor.authorLedesma, Beatriz
dc.contributor.authorLaginhas, Carlos
dc.contributor.authorTitirici, Maria Magdalena
dc.contributor.institutionNOVA Medical School|Faculdade de Ciências Médicas (NMS|FCM)
dc.contributor.institutionComprehensive Health Research Centre (CHRC) - pólo NMS
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2020-05-21T22:45:37Z
dc.date.available2020-05-21T22:45:37Z
dc.date.issued2020-05-01
dc.descriptionFunding: The work was partially funded by the FCT (Grant FRH/BD/82696/2011) with National (OE) and European Union (FEDER, program COMPETE of QREN) funds. The authors are also grateful to Junta de Extremadura and FEDER (Fondo Europeo de Desarrollo Regional “Una manera de hacer Europa”), for financial help by project IB16108, and also to the program “Ayudas a grupos de la Junta de Extremadura” GR18150. Acknowledgments: The authors are grateful for the SAIUEX (Servicios de Apoyo a la Investigación de la Universidad de Extremadura) for their help in textural and surface chemistry analysis of the hydrochars.
dc.description.abstractThe aim of this work was to test activated carbons derived from hydrochars produced from sunflower stem, olive stone and walnut shells, as adsorbents for emerging contaminants in aqueous solution, namely fluoxetine and nicotinic acid. The adsorption capacity was determined by the chemical nature of the adsorbents, namely the presence of specific functional groups and their positive or negative ionization in aqueous solutions and also by steric factors. The activated carbons produced by air showed a higher adsorption capacity of fluoxetine, whilst the samples produced by carbon dioxide activation were more useful to remove nicotinic acid. In general, surface acidity was advantageous for fluoxetine adsorption and detrimental for nicotinic acid removal. The adsorption mechanisms involved in each case were discussed and related to the adsorbents characteristics. The maximum adsorption capacity, Q0, given by the Langmuir model was 44.1 and 91.9 mg g-1 for fluoxetine and nicotinic acid adsorption, respectively.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent1640482
dc.identifier.doi10.3390/molecules25092264
dc.identifier.otherPURE: 18257733
dc.identifier.otherPURE UUID: cb782253-ee57-4e47-ac70-43e25a265216
dc.identifier.otherScopus: 85084447250
dc.identifier.otherPubMed: 32403348
dc.identifier.otherWOS: 000535695900260
dc.identifier.urihttp://hdl.handle.net/10362/98112
dc.identifier.urlhttps://www.scopus.com/pages/publications/85084447250
dc.language.isoeng
dc.peerreviewedyes
dc.subjectActivated carbons
dc.subjectAdsorption
dc.subjectHydrocarbonization
dc.subjectPharmaceutical effluents
dc.subjectWater
dc.subjectAnalytical Chemistry
dc.subjectChemistry (miscellaneous)
dc.subjectMolecular Medicine
dc.subjectPharmaceutical Science
dc.subjectDrug Discovery
dc.subjectPhysical and Theoretical Chemistry
dc.subjectOrganic Chemistry
dc.titleSurface interactions during the removal of emerging contaminants by hydrochar-based adsorbentsen
dc.typejournal article
degois.publication.issue9
degois.publication.titleMolecules
degois.publication.volume25
dspace.entity.typePublication
rcaap.rightsopenAccess

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