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Methionine-functionalized graphene oxide/sodium alginate bio-polymer nanocomposite hydrogel beads

2021-03Artigo científico Acesso aberto
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dc.contributor.authorYadav, Sushma
dc.contributor.authorAsthana, Anupama
dc.contributor.authorSingh, Ajaya Kumar
dc.contributor.authorChakraborty, Rupa
dc.contributor.authorSree Vidya, S.
dc.contributor.authorSingh, Ambrish
dc.contributor.authorCarabineiro, Sónia A. C.
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.institutionDQ - Departamento de Química
dc.contributor.pblMDPI AG
dc.date.accessioned2021-10-12T04:51:30Z
dc.date.available2021-10-12T04:51:30Z
dc.date.issued2021-03
dc.descriptionNo. 3114/4/Fin./Sch.//2018
dc.description.abstractIn spite of the growing demand for new antibiotics, in the recent years, the occurrence of fluoroquinolone antibiotics (as a curative agent for urinary tract disorders and respiratory problems) in wastewater have drawn immense attention. Traces of antibiotic left-overs are present in the water system, causing noxious impact on human health and ecological environments, being a global concern. Our present work aims at tackling the major challenge of toxicity caused by antibiotics. This study deals with the efficient adsorption of two commonly used fluoroquinolone (FQ) antibiotics, i.e., Ofloxacin (OFX) and Moxifloxacin (MOX) on spherical hydrogel beads generated from methionine‒functionalized graphene oxide/ sodium alginate polymer (abbreviated Met-GO/SA) from aqueous solutions. The composition, morphology and crystal phase of prepared adsorbents were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), high-resolution transmission electron microscopy (HR-TEM) and thermogravimetric analysis/differential thermogravimetry (TGA/DTG). Batch adsorption tests are followed to optimize the conditions required for adsorption process. Both functionalized and non-functionalized adsorbents were compared to understand the influence of several experimental parameters, such as, the solution pH, contact time, adsorbent dosage, temperature and initial concentration of OFX and MOX on adsorption. The obtained results indicated that the functionalized adsorbent (Met-GO/SA) showed a better adsorption efficiency when compared to non-functionalized (GO/SA) adsorbent. Further, the Langmuir isotherm was validated as the best fitting model to describe adsorption equilibrium and pseudo second-order-kinetic model fitted well for both types of adsorbate. The maximum adsorption capacities of Met-GO/SA were 4.11 mg/g for MOX and 3.43 mg/g for OFX. Thermodynamic parameters, i.e., ∆G°, ∆H° and ∆S° were also calculated. It was shown that the overall adsorption process was thermodynamically favorable, spontaneous and exothermic in nature. The adsorbents were successfully regenerated up to four cycles with 0.005 M NaCl solutions. Overall, our work showed that the novel Met-GO/SA nanocomposite could better contribute to the removal of MOX and OFX from the liquid media. The gel beads prepared have adequate features, such as simple handling, eco-friendliness and easy recovery. Hence, polymer gel beads are promising candidates as adsorbents for large-scale water remediation.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent25
dc.format.extent5421802
dc.identifier.doi10.3390/nano11030568
dc.identifier.issn2079-4991
dc.identifier.otherPURE: 28556728
dc.identifier.otherPURE UUID: 165216f0-56a1-4dd4-986b-61ed450b1318
dc.identifier.otherScopus: 85101354309
dc.identifier.otherPubMed: 33668774
dc.identifier.otherPubMedCentral: PMC7996286
dc.identifier.otherWOS: 000633978200001
dc.identifier.otherORCID: /0000-0001-9913-4671/work/101301382
dc.identifier.urihttp://hdl.handle.net/10362/125955
dc.identifier.urlhttps://www.scopus.com/pages/publications/85101354309
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/CEEC INST 2018/CEECINST%2F00102%2F2018%2FCP1567%2FCT0001/PT
dc.relationNot Available
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.subjectAdsorption
dc.subjectFluoroquinolones antibiotics
dc.subjectGraphene oxide
dc.subjectHydrogel beads
dc.subjectIsotherms
dc.subjectKinetics
dc.subjectMethionine functionalized
dc.subjectPolymer nanocomposite
dc.subjectThermodynamics
dc.subjectGeneral Chemical Engineering
dc.subjectGeneral Materials Science
dc.subjectSDG 3 - Good Health and Well-being
dc.subjectSDG 6 - Clean Water and Sanitation
dc.subjectSDG 13 - Climate Action
dc.titleMethionine-functionalized graphene oxide/sodium alginate bio-polymer nanocomposite hydrogel beadsen
dc.title.subtitleSynthesis, isotherm and kinetic studies for an adsorptive removal of fluoroquinolone antibioticsen
dc.typejournal article
degois.publication.firstPage1
degois.publication.issue3
degois.publication.lastPage25
degois.publication.titleNanomaterials
degois.publication.volume11
dspace.entity.typePublication
oaire.awardNumberCEECINST/00102/2018/CP1567/CT0001
oaire.awardNumberUIDB/50006/2020
oaire.awardNumberUIDP/50006/2020
oaire.awardTitleNot Available
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/CEEC INST 2018/CEECINST%2F00102%2F2018%2FCP1567%2FCT0001/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50006%2F2020/PT
oaire.fundingStreamCEEC INST 2018
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
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
rcaap.rightsopenAccess
relation.isProjectOfPublication6f46e6ae-f2a2-41d6-8aa9-ab10c4fa8058
relation.isProjectOfPublicationadc84c24-ba1d-4bcd-b753-2128ce9a5faa
relation.isProjectOfPublication4d9a4d40-4803-4f3a-976b-d6eaaef42510
relation.isProjectOfPublication.latestForDiscovery4d9a4d40-4803-4f3a-976b-d6eaaef42510

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