Biochars obtained from arabica coffee husk by a pyrolysis process: characterization and application in the Fe(ii) removal in aqueous systems

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dc.creatorTiago Guimarães
dc.creatorAna Paula de Carvalho Teixeira
dc.creatorAndré Fernando de Oliveira
dc.creatorRenata Pereira Lopes
dc.date.accessioned2023-07-27T12:21:20Z
dc.date.accessioned2025-09-09T00:13:40Z
dc.date.available2023-07-27T12:21:20Z
dc.date.issued2020
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/10.1039/C9NJ04144C
dc.identifier.issn1144-0546
dc.identifier.urihttps://hdl.handle.net/1843/57047
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofNew Journal of Chemistry
dc.rightsAcesso Restrito
dc.subjectÁgua - Purificação - Adsorção
dc.subjectPirólise
dc.subjectCafé - Resíduos
dc.subjectBiomassa vegetal
dc.subjectTermogravimetria
dc.subjectEspectroscopia de infravermelho
dc.subjectRaios X - Difração
dc.subjectFerro
dc.subject.otherBiochars
dc.subject.otherArabica coffee husks
dc.subject.otherAdsorption
dc.subject.otherPyrolysis
dc.subject.otherFTIR spectra
dc.subject.otherThermogravimetric analyses
dc.subject.otherFe(II) removal
dc.subject.otherThermodynamics
dc.titleBiochars obtained from arabica coffee husk by a pyrolysis process: characterization and application in the Fe(ii) removal in aqueous systems
dc.typeArtigo de periódico
local.citation.epage3322
local.citation.spage3310
local.citation.volume44
local.description.resumoIn this work biochars were synthesized from arabica coffee husks and were used for Fe(II) adsorption by a Pirolise process at 350 and 600 °C. The in natura material before and after pyrolysis exhibited an amorphous structure, showing C, H, and N levels, for both biochars, of around 70, 0.25, and 2.5% (m/m), respectively. The Point of Zero Charge (PZC) was 9.5 and 10.2 for BIO350 and BIO600, respectively. FTIR spectra and thermogravimetric analyses confirmed the presence of OH, COOH, and SO3H groups on the coffee husks’ surfaces as well as the loss of these groups on the biochars’ surfaces, with the biochars being more stable than the coffee husks. The synthesized biochars presented amorphous characteristics before the adsorption process of iron(II), but turned into nail-like structures after the Fe(II) adsorption studies. The Langmuir isotherm model and pseudo-second order kinetic model were the best models fitted to the experimental data and were evaluated based on the coefficient of determination. Both biochars demonstrated similar efficiencies in Fe(II) removal, with a maximum adsorption capacity of about 110 mg of Fe(II) per gram of biochar. The adsorption thermodynamics indicates a spontaneous and favorable process, thus justifying the use of biochars for Fe(II) adsorption in aqueous solution.
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.identifier.orcidhttps://orcid.org/0000-0003-4158-6098
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://pubs.rsc.org/en/content/articlelanding/2020/NJ/C9NJ04144C

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