Biochar-iron composites: an efficient material for dyes removal

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dc.creatorTiago Guimarães
dc.creatorVivian Andrade Luciano
dc.creatorMayara Stefani Ventura Silva
dc.creatorAna Paula de Carvalho Teixeira
dc.creatorMarcelo Moreira da Costa
dc.creatorRenata Pereira Lopes
dc.date.accessioned2023-11-20T20:44:49Z
dc.date.accessioned2025-09-09T00:22:42Z
dc.date.available2023-11-20T20:44:49Z
dc.date.issued2022
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1016/j.enmm.2022.100645
dc.identifier.issn2215-1532
dc.identifier.urihttps://hdl.handle.net/1843/61166
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofEnvironmental Nanotechnology, Monitoring & Management
dc.rightsAcesso Restrito
dc.subjectPoluentes
dc.subjectAgua - Purificação - Adsorção
dc.subjectBiomassa
dc.subjectAdsorção
dc.subjectÁguas residuais - Purificação - Remoção de cor
dc.subject.otherTextiles pollutants
dc.subject.otherResidual water
dc.subject.otherBiomass
dc.subject.otherAdsorption / degradation
dc.titleBiochar-iron composites: an efficient material for dyes removal
dc.typeArtigo de periódico
local.citation.spage100645
local.citation.volume17
local.description.resumoIn this work, the removal of methyl orange (MOR) and methylene blue (MBL) by composites based on iron supported on biochar was evaluated. The biochar was produced from pyrolysis of arabica coffee (Coffea arabica) husks, following Fe(II) adsorption. The adsorbed Fe(II) was submitted to chemical reduction, via borohydride, producing zero-valent iron nanoparticles (nZVI/BC). This material showed point of zero charge (pHPCZ) of 8.6. Kinetic studies indicated that the pseudo-second order model was the best fit to experimental data for both dyes. The maximum removal capacities were 57.1 and 62.1 mg g−1 for MOR and MBL, respectively. The material can be used in three different cycles, with no loss efficiency (>80% for MOR and >90% for MBL). During dye removal, two processes occur, adsorption and degradation, the first being predominant. Thus, to maximize the efficiency of both processes, it was suggested the use of a sequence, that is, adsorption followed by degradation of desorbed solution. Such processes are feasible because the effluent volume is significantly lower, reducing process costs. The results, therefore, demonstrated that nZVI/BC has potential to be used in dye removal from aqueous systems in a quick and efficient manner.
local.identifier.orcidhttps://orcid.org/0000-0002-5766-7821
local.identifier.orcidhttps://orcid.org/0000-0002-4985-7502
local.identifier.orcidhttps://orcid.org/0000-0003-1049-8300
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S2215153222000058

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