Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”

Detalhes bibliográficos
Autor(a) principal: Nabais, Joao
Data de Publicação: 1997
Outros Autores: Carrott, Peter, Ribeiro Carrott, Manuela
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/2630
Resumo: surface ionization and adsorption model is used to simulate the adsorption of zinc species from aqueous solutions of varying pH on a number of different activated carbons and the results compared with experimental data. In all cases good agreement is obtained between theory and experiment. It is shown that for most of the carbons the uptake of zinc is due to adsorption of Zn*+ ions on ionized acid sites, the calculated equilibrium constants being of the order of 10”107. On the other hand, one of the carbons used (NORIT AZO) contains virtually no acid sites, but a high concentration of strong basic sites, and the uptake of zinc in this case appears to be due to adsorption of a negatively charged hydroxy complex on protonated basic sites, the estimated equilibrium constant being 10’
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spelling Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”zinc adsorptionActivated carbonsurface ionization and adsorption model is used to simulate the adsorption of zinc species from aqueous solutions of varying pH on a number of different activated carbons and the results compared with experimental data. In all cases good agreement is obtained between theory and experiment. It is shown that for most of the carbons the uptake of zinc is due to adsorption of Zn*+ ions on ionized acid sites, the calculated equilibrium constants being of the order of 10”107. On the other hand, one of the carbons used (NORIT AZO) contains virtually no acid sites, but a high concentration of strong basic sites, and the uptake of zinc in this case appears to be due to adsorption of a negatively charged hydroxy complex on protonated basic sites, the estimated equilibrium constant being 10’2011-03-16T10:19:41Z2011-03-161997-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article45931 bytesapplication/pdfhttp://hdl.handle.net/10174/2630http://hdl.handle.net/10174/2630eng403-410Carbon35livreCQEjvn@uevora.ptpeter@uevora.ptmanrc@uevora.pt252Nabais, JoaoCarrott, PeterRibeiro Carrott, Manuelainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:36:47Zoai:dspace.uevora.pt:10174/2630Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:57:11.002204Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”
title Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”
spellingShingle Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”
Nabais, Joao
zinc adsorption
Activated carbon
title_short Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”
title_full Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”
title_fullStr Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”
title_full_unstemmed Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”
title_sort Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons”
author Nabais, Joao
author_facet Nabais, Joao
Carrott, Peter
Ribeiro Carrott, Manuela
author_role author
author2 Carrott, Peter
Ribeiro Carrott, Manuela
author2_role author
author
dc.contributor.author.fl_str_mv Nabais, Joao
Carrott, Peter
Ribeiro Carrott, Manuela
dc.subject.por.fl_str_mv zinc adsorption
Activated carbon
topic zinc adsorption
Activated carbon
description surface ionization and adsorption model is used to simulate the adsorption of zinc species from aqueous solutions of varying pH on a number of different activated carbons and the results compared with experimental data. In all cases good agreement is obtained between theory and experiment. It is shown that for most of the carbons the uptake of zinc is due to adsorption of Zn*+ ions on ionized acid sites, the calculated equilibrium constants being of the order of 10”107. On the other hand, one of the carbons used (NORIT AZO) contains virtually no acid sites, but a high concentration of strong basic sites, and the uptake of zinc in this case appears to be due to adsorption of a negatively charged hydroxy complex on protonated basic sites, the estimated equilibrium constant being 10’
publishDate 1997
dc.date.none.fl_str_mv 1997-01-01T00:00:00Z
2011-03-16T10:19:41Z
2011-03-16
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/2630
http://hdl.handle.net/10174/2630
url http://hdl.handle.net/10174/2630
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 403-410
Carbon
35
livre
CQE
jvn@uevora.pt
peter@uevora.pt
manrc@uevora.pt
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