1. Repositório Institucional da UFMG
  2. Publicações Científicas e Culturais
  3. Artigo de Periódico
Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/81574
Full metadata record
DC FieldValueLanguage
dc.creatorIzabela Sabrina Souza de Britopt_BR
dc.creatorClésia Cristina Nascentespt_BR
dc.creatorPaula Sevenini Pintopt_BR
dc.creatorFabiano Gomes Ferreira de Paulapt_BR
dc.creatorAna Paula de Carvalho Teixeirapt_BR
dc.date.accessioned2025-04-14T23:01:18Z-
dc.date.available2025-04-14T23:01:18Z-
dc.date.issued2023-
dc.citation.volume1pt_BR
dc.citation.issue3pt_BR
dc.citation.spage100028pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.nxmate.2023.100028pt_BR
dc.identifier.issn2949-8228pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/81574-
dc.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.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)pt_BR
dc.description.sponsorshipOutra Agênciapt_BR
dc.format.mimetypepdfpt_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.ispartofNext Materialspt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectSulfonated biocharpt_BR
dc.subjectAdsorptionpt_BR
dc.subjectMacauba endocarppt_BR
dc.subjectLead removalpt_BR
dc.subject.otherAdsorçãopt_BR
dc.subject.otherÁguas residuais - Purificaçãopt_BR
dc.subject.otherChumbopt_BR
dc.subject.otherBiomassapt_BR
dc.subject.otherMetais pesadospt_BR
dc.subject.otherRaman, Efeito dept_BR
dc.subject.otherCarbonizaçãopt_BR
dc.subject.otherMicroscopia eletrônicapt_BR
dc.subject.otherÁcido sulfúricopt_BR
dc.titleLow temperature sulfonated biochar from Macauba’s endocarp for lead adsorption from wastewaterpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S294982282300028X?via%3Dihubpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-8514-442Xpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-7499-105Xpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-5231-2204pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4985-7502pt_BR
Appears in Collections:Artigo de Periódico

Files in This Item:
File Description SizeFormat 
Low temperature sulfonated biochar from Macauba’s endocarp for lead adsorption from wastewater.pdf6.1 MBAdobe PDFView/Open
Show simple item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.