Reuse of iron ore tailings as an efficient adsorbent to remove dyes from aqueous solution

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dc.creatorGustavo Alves Puiatti
dc.creatorEduarda Mara Elerate
dc.creatorJéssica Passos de Carvalho
dc.creatorVivian Andrade Luciano
dc.creatorAna Paula de Carvalho Teixeira
dc.creatorRenata Pereira Lopes
dc.creatorAntonio Teixeira de Matos
dc.date.accessioned2023-07-27T14:50:31Z
dc.date.accessioned2025-09-09T01:33:34Z
dc.date.available2023-07-27T14:50:31Z
dc.date.issued2021
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1080/09593330.2021.2011427
dc.identifier.issn1479-487X
dc.identifier.urihttps://hdl.handle.net/1843/57052
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofEnvironmental Technology
dc.rightsAcesso Restrito
dc.subjectResíduos
dc.subjectFerro - Minas e mineração
dc.subjectAdsorção
dc.subjectÁgua- Reutilização
dc.subjectRefugos (Metalurgia)
dc.subjectPoluentes orgânicos aquáticos
dc.subject.otherMining waste
dc.subject.otherEnvironmental remediation
dc.subject.otherPollution control
dc.subject.otherOrganic pollutants
dc.subject.otherAdsorption
dc.titleReuse of iron ore tailings as an efficient adsorbent to remove dyes from aqueous solution
dc.typeArtigo de periódico
local.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.
local.identifier.orcidhttps://orcid.org/0000-0002-9794-431X
local.identifier.orcidhttps://orcid.org/0000-0003-1049-8300
local.identifier.orcidhttps://orcid.org/0000-0002-4985-7502
local.identifier.orcidhttps://orcid.org/0000-0002-4675-732X
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.tandfonline.com/doi/full/10.1080/09593330.2021.2011427

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