Activation of biochar obtained from slow pyrolysis of the macauba coconut residue for removing uranium from aqueous solutions

Página do item simplificado
dc.contributor.authorGUILHEN, S.N.
dc.contributor.authorORTIZ, N.
dc.contributor.authorIZIDORO, J.C.
dc.contributor.authorFUNGARO, D.A.
dc.coverageInternacionalpt_BR
dc.creator.eventoBIOCHARpt_BR
dc.date.accessioned2019-02-28T13:23:08Z
dc.date.available2019-02-28T13:23:08Z
dc.date.eventoAugust 20-23, 2018pt_BR
dc.description.abstractMacauba (Acrocomiaaculeata) is a palm tree native to the savannah-like area of Central Brazil. As a result of the oil extraction from its coconuts, a dark stiff residue, the “endocarp”, rich in lignin content, has a potential for being exploited as feedstock for biochar production. This study investigates the activation of biochar obtained from slow pyrolysis of the macauba coconut residue in order to remove uranium from aqueous solutions. The non-activated biochar, referred to as “BC350”, is produced at a pyrolytic temperature of 350°C under Ar atmosphere and a 1- hour residence time. The activated biochar was produced the same way and was further subjected to activation via physical route using CO2 at 850°C for 120 min. The product of this treatment was named “BC350-A”. Both biochars were characterized by specific surface area. The surface area increased from 0.832 (untreated biochar) to 643.12 m2 g-1, confirming the improvement of the porosity. The removal efficiency for uranyl ions (U(VI)) increased from 80.5 (untreated biochar) to 99.2% for 5 mg L-1 initial concentration solution adjusted to pH 3 using a 10 g L-1dosage. Adsorption isotherms were employed to represent the results of the U adsorption onto the BC350-A. An estimation of the best fit was performed by calculating different deviation equations, also called error functions. The Redlich-Peterson isotherm model was the most appropriate for fitting the experimental data. This hybrid model incorporates both Langmuir and Freundlich’s isotherm functionalities. These results demonstrate that a valueadded material can be produced, encouraging the exploration of thermochemical conversion of lignocellulosic biomasses.pt_BR
dc.identifier.citationGUILHEN, S.N.; ORTIZ, N.; IZIDORO, J.C.; FUNGARO, D.A. Activation of biochar obtained from slow pyrolysis of the macauba coconut residue for removing uranium from aqueous solutions. In: BIOCHAR, August 20-23, 2018, Wilmington, Delaware, USA. <b>Abstract...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/29734.
dc.identifier.orcidaguardandopt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-1618-0264
dc.identifier.orcidhttps://orcid.org/0000-0002-7737-3732
dc.identifier.orcidhttps://orcid.org/0000-0003-2604-1225
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/29734
dc.local.eventoWilmington, Delaware, USApt_BR
dc.rightsopenAccesspt_BR
dc.titleActivation of biochar obtained from slow pyrolysis of the macauba coconut residue for removing uranium from aqueous solutionspt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorDENISE ALVES FUNGARO
ipen.autorJULIANA DE CARVALHO IZIDORO
ipen.autorNILCE ORTIZ
ipen.autorSABINE NEUSATZ GUILHEN
ipen.codigoautor587
ipen.codigoautor3049
ipen.codigoautor904
ipen.codigoautor5931
ipen.contributor.ipenauthorDENISE ALVES FUNGARO
ipen.contributor.ipenauthorJULIANA DE CARVALHO IZIDORO
ipen.contributor.ipenauthorNILCE ORTIZ
ipen.contributor.ipenauthorSABINE NEUSATZ GUILHEN
ipen.date.recebimento19-02pt_BR
ipen.event.datapadronizada2018pt_BR
ipen.identifier.ipendoc25513pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
relation.isAuthorOfPublication8991b6fc-8b88-4efb-a386-34308e9c7d73
relation.isAuthorOfPublicatione225373c-08a2-4e41-8532-6a7b06838c9c
relation.isAuthorOfPublication3a9d6f22-64d9-4a98-8032-ca82e6b88025
relation.isAuthorOfPublicationc3932232-0001-4122-bc0e-9109d11f8bec
relation.isAuthorOfPublication.latestForDiscoveryc3932232-0001-4122-bc0e-9109d11f8bec
sigepi.autor.atividadeGUILHEN, S.N.:5931:510:Spt_BR
sigepi.autor.atividadeORTIZ, N.:904:510:Npt_BR
sigepi.autor.atividadeIZIDORO, J.C.:3049:510:Npt_BR
sigepi.autor.atividadeFUNGARO, D.A.:587:510:Npt_BR
Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
25513.pdf
Tamanho:
386.51 KB
Formato:
Adobe Portable Document Format
Descrição:
Baixar
Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar
Coleções
Eventos - Resumos