Low temperature sulfonated biochar from Macauba’s endocarp for lead adsorption from wastewater

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dc.creatorIzabela Sabrina Souza de Brito
dc.creatorClésia Cristina Nascentes
dc.creatorPaula Sevenini Pinto
dc.creatorFabiano Gomes Ferreira de Paula
dc.creatorAna Paula de Carvalho Teixeira
dc.date.accessioned2025-04-14T23:01:18Z
dc.date.accessioned2025-09-09T00:04:56Z
dc.date.available2025-04-14T23:01:18Z
dc.date.issued2023
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.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1016/j.nxmate.2023.100028
dc.identifier.issn2949-8228
dc.identifier.urihttps://hdl.handle.net/1843/81574
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofNext Materials
dc.rightsAcesso Aberto
dc.subjectAdsorção
dc.subjectÁguas residuais - Purificação
dc.subjectChumbo
dc.subjectBiomassa
dc.subjectMetais pesados
dc.subjectRaman, Efeito de
dc.subjectCarbonização
dc.subjectMicroscopia eletrônica
dc.subjectÁcido sulfúrico
dc.subject.otherSulfonated biochar
dc.subject.otherAdsorption
dc.subject.otherMacauba endocarp
dc.subject.otherLead removal
dc.titleLow temperature sulfonated biochar from Macauba’s endocarp for lead adsorption from wastewater
dc.typeArtigo de periódico
local.citation.issue3
local.citation.spage100028
local.citation.volume1
local.description.resumoLead is a heavy metal that can be present in different types of effluents. This toxic ion is harmful both to human health and to other species. Therefore, it is necessary to study materials that can be used to remove lead from aquatic environments. In this context, the use of modified biomass residues for the production of efficient adsorbents for this purpose stands out. In this work was synthesized a new type of adsorbent material, sulfonated carbon, from macauba oil extraction residue for application in the removal of lead ions from aqueous media. The sulfonated carbons were produced from the reaction of macauba endocarp with concentrated sulfuric acid at 100 °C at 1, 2 and 4 h. The materials were characterized by XRD, MS-TG, Raman and infrared spectroscopies, SEM, potential titration, elemental analysis and by N2 adsorption/desorption. All synthetic conditions were efficient to produce functionalized carbonaceous materials with amorphous characteristics and good thermal stability. Although the material carbonized for 4 h had a low specific surface area (2 m2.g−1), it showed the higher efficiency for the removal of lead ions from aqueous solution. The adsorption occurred due to interactions of these ions with the functional groups present on the surface of the coal. The greatest lead removal occurred at pH 5.0 (83.8%), where –COOH and SO3H groups are in the deprotonated form, what favors the electrostatic attraction of Pb2+ ions. The experimental results were fitted using pseudo-first-order and pseudo-second-order models. A high concentration of lead ions was removed in the first 40 min, and the removal percentage was 97.5% for the less concentrated solution (10 mg·L−1) and 55.0% for the solution with the highest concentration (100 mg·L−1). The increase in the concentration of adsorbent provided an increase in the removal of this contaminant. The isotherm of adsorption was adjusted by Langmuir and Freundlich models. The better adjust was obtained by Langmuir and the maximum adsorption capacity by this model was 104.2 mg·g−1. The best lead removal conditions were: adsorbent concentration: 0.5 g.L−1; pH 5; Pb2+ concentration 80 mg.L−1 and time 2 h.
local.identifier.orcidhttps://orcid.org/0000-0002-8514-442X
local.identifier.orcidhttps://orcid.org/0000-0002-7499-105X
local.identifier.orcidhttps://orcid.org/0000-0002-5231-2204
local.identifier.orcidhttps://orcid.org/0000-0002-4985-7502
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S294982282300028X?via%3Dihub

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