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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/57052
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dc.creatorGustavo Alves Puiattipt_BR
dc.creatorEduarda Mara Eleratept_BR
dc.creatorJéssica Passos de Carvalhopt_BR
dc.creatorVivian Andrade Lucianopt_BR
dc.creatorAna Paula de Carvalho Teixeirapt_BR
dc.creatorRenata Pereira Lopespt_BR
dc.creatorAntonio Teixeira de Matospt_BR
dc.date.accessioned2023-07-27T14:50:31Z-
dc.date.available2023-07-27T14:50:31Z-
dc.date.issued2021-
dc.identifier.doihttps://doi.org/10.1080/09593330.2021.2011427pt_BR
dc.identifier.issn1479-487Xpt_BR
dc.identifier.urihttp://hdl.handle.net/1843/57052-
dc.description.resumoIn this work, an iron ore tailings sample (IOT), collected from a tailings dam in Minas Gerais, Brazil, was characterized. The IOT presented point of zero charge of ∼ 6, specific surface area of 4 m2 g−1, and was mainly composed of hematite and quartz. Subsequently, experiments were performed to evaluate the adsorption of an anionic dye, Direct Red 80 (DR80), and a cationic dye, Methylene Blue (MB), by the IOT, studying the effects of its dose (doseIOT) and the solution initial pH (pH0). The DR80 removal increased with the decrease of the pH0 while the opposite effect occurred in the experiments with the MB, suggesting the process is governed by the adsorption resulting from electrostatic forces. The increase in the doseIOT increased the DR80 and MB removal, which can be attributed to the greater availability of adsorption sites. Pseudo-second order kinetic (R2 > 0.9994) and the Langmuir equilibrium isotherm (R2 > 0.9842) models described well the DR80 adsorption by the IOT, being the reaction rate and maximum adsorption capacity higher at lower pH0. In a regeneration experiment, it was possible to desorb almost entirely the DR80 using a NaOH solution. Additionally, the regenerated IOT was able to adsorb the DR80, demonstrating its reusability. In a preliminary assay, the IOT decreased the colour of the textile wastewater sample at pH0 3. Therefore, the results indicate the potential use of IOT for removing electric-charged pollutants by adsorption, especially anionic ones under acidic conditions.pt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipOutra Agênciapt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofEnvironmental Technologypt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectMining wastept_BR
dc.subjectEnvironmental remediationpt_BR
dc.subjectPollution controlpt_BR
dc.subjectOrganic pollutantspt_BR
dc.subjectAdsorptionpt_BR
dc.subject.otherResíduospt_BR
dc.subject.otherFerro - Minas e mineraçãopt_BR
dc.subject.otherAdsorçãopt_BR
dc.subject.otherÁgua- Reutilizaçãopt_BR
dc.subject.otherRefugos (Metalurgia)pt_BR
dc.subject.otherPoluentes orgânicos aquáticospt_BR
dc.titleReuse of iron ore tailings as an efficient adsorbent to remove dyes from aqueous solutionpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.tandfonline.com/doi/full/10.1080/09593330.2021.2011427pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9794-431Xpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-1049-8300pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4985-7502pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4675-732Xpt_BR
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