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Application of experimental design methodology to optimize antibiotics removal by walnut shell based activated carbon

2019Journal article Open access
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dc.contributor.authorTeixeira, Salomé
dc.contributor.authorDelerue-Matos, Cristina
dc.contributor.authorSantos, L.
dc.date.accessioned2020-10-30T12:06:06Z
dc.date.available2020-10-30T12:06:06Z
dc.date.issued2019
dc.description.abstractThree-level Box-Behnken experimental design with three factors (pH, temperature and antibiotic initial concentration) combined with response surface methodology (RSM) was applied to study the removal of Metronidazole and Sulfamethoxazole by walnut shell based activated carbon. This methodology enabled to identify the effects of the different factors studied and their interactions in the response of each antibiotic. The relationship between the independent variable (sorption capacity) and the dependent variables (pH, temperature and antibiotic concentration) was adequately modelled by second-order polynomial equation. The pH factor exerted a significant but distinct influence on the removal efficiency of both antibiotics. The removal of Metronidazole is favoured by increasing pH values, with the maximum value obtained for pH 8 - upper limit of the study domain; while Sulfamethoxazole displays a maximum value around 5.5, with a decrease in the extent of adsorption as the pH increases. The best conditions, predicted by the model, for the removal of the antibiotic Sulfamethoxazole (106.9 mg/g) are obtained at a temperature of 30 °C, initial concentration of 40 mg/L and a pH value of 5.5. For the antibiotic Metronidazole, the highest removal value (127 mg/g) is expected to occur at the maximum levels attributed to each of the factors (pH = 8, Cin = 40 mg/L, T = 30 °C). The results of isotherm experiments (at 20 °C and pH 6) displayed a good agreement with the models predictions. The maximum sorption capacity, estimated by the Langmuir model, was 107.4 mg/g for Metronidazole and 93.5 mg/g for Sulfamethoxazole.pt_PT
dc.description.sponsorshipThis work was financially supported by the projects POCI-01-0145-FEDER-006939 (LEPABE), POCI-010145-FEDER-007265 (REQUIMTE/LAQV) funded by the European Regional Development Fund (ERDF), through COMPETE2020 - Programa Operacional Competitividade e Internacionalização (POCI) and by national funds, through FCT - Fundação para a Ciência e a Tecnologia (LEPABE - UID/EQU/00511/2013; REQUIMTE/LAQV - UID/QUI/50006/2013) and NORTE-01-0145-FEDER-000005 – LEPABE-2-ECO-INNOVATION, supported by North Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.scitotenv.2018.07.204pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/16391
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0048969718326950?via%3Dihubpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectAdsorptionpt_PT
dc.subjectAnti-Bacterial Agentspt_PT
dc.subjectActivated carbonpt_PT
dc.subjectCharcoalpt_PT
dc.subjectHydrogen-Ion Concentrationpt_PT
dc.subjectJuglanspt_PT
dc.subjectNutspt_PT
dc.subjectResearch Designpt_PT
dc.subjectWater Pollutantspt_PT
dc.subjectAntibioticspt_PT
dc.subjectWalnut Shellpt_PT
dc.subjectRemovalpt_PT
dc.subjectBox-Behnkenpt_PT
dc.subjectResponse surface methodologypt_PT
dc.titleApplication of experimental design methodology to optimize antibiotics removal by walnut shell based activated carbonpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FEQU%2F00511%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F50006%2F2013/PT
oaire.citation.endPage176pt_PT
oaire.citation.startPage168pt_PT
oaire.citation.titleScience of the Total Environmentpt_PT
oaire.citation.volume646pt_PT
oaire.fundingStream5876
oaire.fundingStream5876
person.familyNameTeixeira
person.familyNameDelerue-Matos
person.givenNameSalomé
person.givenNameCristina
person.identifier.ciencia-idCF16-4CDE-4A69
person.identifier.ciencia-id9A1A-43FB-5C27
person.identifier.orcid0000-0002-9473-0113
person.identifier.orcid0000-0002-3924-776X
person.identifier.ridD-4990-2013
person.identifier.scopus-author-id15832784500
person.identifier.scopus-author-id6603741848
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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